Commercial or technical designation of a manufacturer's product family sharing a common design and compatible characteristics.

Range of tasks and systems for which the manufacturer recommends the component.

Primary function of the device and its intended use as defined by its design and the manufacturer's documentation.

Permissible installation location of the product: indoors, outdoors, in a technical area, or as part of equipment.

Environmental conditions under which installation and operation of the product are permitted.

Permissible spatial orientation of the component during installation and operation.

High-level electrical or process monitoring domains supported by the product.

External horizontal dimension of the product between its outermost lateral points.

External vertical dimension of the product from its lowest to its highest point.

External distance between the foremost and rearmost surfaces of the product.

Number of available digital inputs of the product.

Number of available digital outputs of the product.

Number of independent relay outputs or sets of switching contacts provided by the product.

Contact configurations provided for the product relay outputs.

Functions permanently assigned or assignable to the product relay outputs.

Number of normally open switching contact sets provided by the relay.

Number of normally closed switching contact sets provided by the relay.

Number of changeover contact sets provided by the relay.

Number of distinct liquid level points that can be evaluated by one monitoring function or device.

Number of independent level monitoring channels provided by the device.

Maximum number of level electrodes or conductive probes that can be connected to the device.

Number of integrated physical Ethernet communication ports.

Number of integrated physical RS-485 communication interfaces.

Number of integrated physical USB ports provided by the product, including charging, data, communication or programming ports.

Minimum number of electrical cycles used for ROCOF evaluation where configurable or specified by the manufacturer.

Maximum number of electrical cycles used for ROCOF evaluation where configurable or specified by the manufacturer.

Number of independently usable insulation-resistance response values or alarm thresholds.

Number of independently connectable temperature sensor or thermistor measuring circuits.

Number of distinct liquid-level switching points that can be evaluated by the device, typically one or two.

Maximum number of conductive measuring electrodes directly connected to one level monitoring device.

Maximum number of different measured quantities that can be evaluated simultaneously.

Number of independent parameter or setting sets that can be stored in the device.

Maximum number of monitoring functions that can operate simultaneously in one device configuration.

Primary visually perceived colour of the product's external surface.

Designation of the product's primary surface colour according to the RAL colour system.

Type of final surface finish of the product determining its appearance and service properties.

Primary material from which the product is manufactured.

Grade, alloy, class, or technical designation of the product's primary material.

Profile type of the DIN rail installed in the product or specified for compatible mounting.

Installation arrangement permitted by the product design, such as wall-mounted, flush-mounted, floor-mounted, or another specified mounting type.

Method used to mechanically secure the product to a support, surface, or load-bearing structure.

Indicates whether the design provides for mounting equipment on a DIN rail.

Indicates whether equipment may be mounted directly to the mounting surface without an intermediate DIN rail.

Voltage with reference to which the product's insulation clearances and dielectric properties are specified.

Peak value of an impulse voltage of specified waveform that the product insulation must withstand without breakdown.

Test voltage applied to verify the dielectric strength of the product insulation.

Minimum permissible insulation resistance between the specified electrically separated parts.

Category characterizing the expected level of impulse overvoltages at the product's point of use.

Degree of pollution of the surrounding microenvironment considered when selecting insulation distances and product characteristics.

Type of electrical insulation used, considered in terms of its protective function and construction.

Class of protection against electric shock determined by the product design and protective connection method.

Maximum manufacturer-declared active power that may be switched by the relay-output contacts.

Manufacturer-declared response time of the relevant protective function of the product to a surge impulse.

Supported wiring arrangements for resistive temperature sensors, such as 2-wire, 3-wire or 4-wire connection.

Relationship between the monitored measuring circuit and the electrical supply required for operation of the monitoring or indication function.

Defines whether a monitoring threshold is specified as an absolute measured value or relative to a nominal or measuring-range value.

Current type of the monitored voltage measuring circuit: AC, DC or AC/DC.

Lower limit of the manufacturer-declared voltage measuring range.

Upper limit of the manufacturer-declared voltage measuring range.

Manufacturer-declared accuracy of voltage measurement where expressed as a single percentage value.

Manufacturer-declared accuracy of the configured voltage monitoring threshold.

Repeat accuracy of voltage threshold detection or switching under constant conditions.

Maximum voltage-monitoring error attributable to variation of the device supply voltage within its declared tolerance.

Change of voltage-monitoring accuracy per degree of temperature variation.

Electrical input resistance of the monitored voltage measuring circuit.

Minimum AC measuring-signal frequency supported by the voltage monitoring function.

Maximum AC measuring-signal frequency supported by the voltage monitoring function.

Lower limit of the rated measuring-signal frequency range for which nominal voltage-monitoring characteristics are specified.

Upper limit of the rated measuring-signal frequency range for which nominal voltage-monitoring characteristics are specified.

Maximum short-duration voltage that the measuring input can withstand without damage under the stated pulse duration.

Duration associated with the manufacturer-declared pulse overload capability of the monitored voltage input.

Maximum voltage that may be continuously applied to the monitored voltage input under manufacturer-declared conditions.

Method used to detect interruption or abnormal condition of the neutral conductor.

Minimum configurable phase-failure detection threshold expressed as a percentage of the applicable nominal or reference phase voltage.

Maximum configurable phase-failure detection threshold expressed as a percentage of the applicable nominal or reference phase voltage.

Maximum regenerative or back-fed voltage, expressed relative to the monitored line voltage, for which reliable phase-failure detection is declared.

Minimum configurable voltage-asymmetry or voltage-unbalance threshold.

Maximum configurable voltage-asymmetry or voltage-unbalance threshold.

Manufacturer-declared accuracy of phase-voltage asymmetry or voltage-unbalance evaluation.

Repeat accuracy of phase-asymmetry threshold detection under constant reference conditions.

Nominal frequency of the electrical source or circuit monitored by the device.

Lower limit of the manufacturer-declared frequency measurement range.

Upper limit of the manufacturer-declared frequency measurement range.

Manufacturer-declared absolute accuracy of frequency measurement.

Manufacturer-declared absolute accuracy of the configured frequency monitoring threshold.

Repeat accuracy of frequency threshold detection under constant reference conditions.

Smallest manufacturer-supported adjustment increment for an absolute frequency threshold.

Smallest manufacturer-supported adjustment increment when the frequency threshold is specified relative to nominal frequency.

Minimum configurable rate-of-change-of-frequency threshold.

Maximum configurable rate-of-change-of-frequency threshold.

Current type of the monitored measuring circuit: AC, DC or AC/DC.

Types of current quantities evaluated by the monitoring device, for example RMS, active-current component or apparent current.

Nominal current used as the reference value for current monitoring and relative threshold settings.

Lower limit of the manufacturer-declared current measuring range.

Upper limit of the manufacturer-declared current measuring range.

Manufacturer-declared relative accuracy of current measurement where expressed as a percentage.

Manufacturer-declared accuracy of the configured current monitoring threshold.

Repeat accuracy of current threshold detection under constant reference conditions.

Change of current monitoring accuracy per degree of temperature variation.

Electrical resistance of the current measuring input.

Minimum AC current frequency supported by the measuring input.

Maximum AC current frequency supported by the measuring input.

Maximum current that may be continuously applied to the measuring input without exceeding manufacturer-declared limits.

Maximum short-duration current that the measuring input can withstand.

Duration associated with the declared short-duration current input overload capability.

Minimum configurable current hysteresis expressed as an absolute current difference.

Maximum configurable current hysteresis expressed as an absolute current difference.

Supported methods for connecting the monitored current to the measuring device.

Minimum configurable primary-to-secondary current transformer ratio.

Maximum configurable primary-to-secondary current transformer ratio.

Apparent-power burden presented by the measuring input to an external current transformer under manufacturer-declared conditions.

Minimum supported measuring voltage across an external current shunt. UI may display the value in mV.

Maximum supported measuring voltage across an external current shunt. UI may display the value in mV.

Defines whether electrical power is evaluated as a total system value, per phase, or both.

Electrical power quantities measured or calculated by the device.

Power-flow directions that can be measured or evaluated by the product.

Lower limit of the manufacturer-declared active-power measuring range.

Upper limit of the manufacturer-declared active-power measuring range.

Manufacturer-declared relative accuracy of active-power measurement.

Minimum configurable active-power hysteresis expressed as an absolute power difference.

Maximum configurable active-power hysteresis expressed as an absolute power difference.

Minimum configurable active-power threshold for detection of reverse or exported power flow.

Maximum configurable active-power threshold for detection of reverse or exported power flow.

Lower limit of the manufacturer-declared reactive-power measuring range.

Upper limit of the manufacturer-declared reactive-power measuring range.

Manufacturer-declared relative accuracy of reactive-power measurement.

Minimum configurable reactive-power monitoring threshold.

Maximum configurable reactive-power monitoring threshold.

Lower limit of the manufacturer-declared apparent-power measuring range.

Upper limit of the manufacturer-declared apparent-power measuring range.

Manufacturer-declared relative accuracy of apparent-power measurement.

Minimum configurable apparent-power monitoring threshold.

Maximum configurable apparent-power monitoring threshold.

Inductive or capacitive power-factor regions that the device can distinguish or monitor.

Lower limit of the manufacturer-declared power-factor measuring range.

Upper limit of the manufacturer-declared power-factor measuring range.

Manufacturer-declared absolute accuracy of power-factor measurement expressed as a cos φ value difference.

Smallest manufacturer-supported adjustment increment for the power-factor threshold.

Indicates support for measurement of the active or resistive current component Ires, distinct from RMS current.

Lower limit of the manufacturer-declared active-current Ires measuring range.

Upper limit of the manufacturer-declared active-current Ires measuring range.

Minimum configurable hysteresis for active-current Ires monitoring.

Maximum configurable hysteresis for active-current Ires monitoring.

Lower limit of the nominal voltage range of the electrical system for which monitoring is supported.

Upper limit of the nominal voltage range of the electrical system for which monitoring is supported.

Minimum frequency of the monitored AC or AC/DC system supported by the insulation monitoring function.

Maximum frequency of the monitored AC or AC/DC system supported by the insulation monitoring function.

Lower limit of the insulation-resistance measuring range of the monitoring device.

Upper limit of the insulation-resistance measuring range of the monitoring device.

Minimum configurable insulation-resistance response value Ran.

Maximum configurable insulation-resistance response value Ran.

Manufacturer-declared relative uncertainty of the insulation-resistance response value.

Percentage component of the insulation-resistance response hysteresis.

Absolute resistance component added to the insulation-resistance response hysteresis where declared by the manufacturer.

Maximum manufacturer-declared response time of the insulation monitoring function under the specified resistance and system-capacitance conditions.

Maximum measuring or test voltage injected into the monitored system by the insulation monitoring function.

Minimum internal DC resistance of the insulation monitoring measuring circuit.

Minimum internal measuring impedance of the insulation monitoring circuit at the manufacturer-declared reference frequency.

Maximum extraneous DC voltage that may be present in the monitored system without exceeding the declared limits of the insulation monitoring device.

Maximum locating current generated or supported for insulation fault location.

Maximum locating voltage generated or supported for insulation fault location.

Lower limit of the manufacturer-declared temperature measuring range.

Upper limit of the manufacturer-declared temperature measuring range.

Manufacturer-declared absolute temperature measurement accuracy expressed as a temperature difference.

Manufacturer-declared temperature measurement accuracy expressed as a percentage of measuring range or full scale.

Change of temperature measuring accuracy caused by variation of the control supply voltage.

Change of measuring accuracy per degree of ambient temperature variation.

Repeat accuracy of temperature threshold detection under constant reference conditions.

Smallest manufacturer-supported adjustment increment for a temperature threshold.

Maximum measuring or excitation current supplied through a connected temperature sensor circuit.

Maximum manufacturer-declared voltage occurring in the temperature sensor measuring circuit.

Maximum permissible total resistance of series-connected PTC sensors in their cold state.

PTC sensor-circuit resistance at which the protection output changes to the overtemperature trip state.

PTC sensor-circuit resistance below which reset or return to the normal state becomes possible.

Sensor-circuit resistance below which the device identifies a PTC sensor-circuit short circuit and enters the fault state.

Sensor-circuit resistance above which the PTC short-circuit fault condition is cleared or reset becomes possible.

Electrical sensor or probe interface types accepted by the level monitoring device.

Supported arrangements of conductive electrodes used for single-level or two-level monitoring.

Minimum selectable resistance threshold of the conductive level sensing circuit.

Maximum selectable resistance threshold of the conductive level sensing circuit.

Manufacturer-declared accuracy of the resistance-based level sensing function.

Change of resistance-based level measurement accuracy per degree of ambient temperature variation.

Current waveform used by the level monitoring device to excite conductive probes or electrodes.

Maximum manufacturer-declared measuring voltage applied to the level electrodes.

Maximum manufacturer-declared measuring current flowing through the level sensing probes.

Frequency of the AC or modulated measuring signal applied to conductive level probes where specified.

Maximum permissible total capacitance of the level probe connection cable for the applicable sensitivity range.

Nominal auxiliary voltage supplied by the monitoring device to an external level sensor.

Maximum output current available from the integrated external level sensor supply.

Type of electrical current for which the product's main supply circuit is intended.

Voltage value assigned to the product by the manufacturer for specified application conditions and characteristics.

Rated RMS value of alternating voltage assigned to the product by the manufacturer.

Rated direct voltage assigned to the product by the manufacturer.

AC frequency assigned to the product for normal operating conditions.

Rated external auxiliary supply voltage required for the product's active functions.

Type of current and source used for the product's auxiliary supply.

Maximum thermal power loss that the product can dissipate under specified conditions.

Thermal power loss of the product or current-carrying system at rated current.

Conductor materials for which the specified terminals and connection methods are designed.

Conductor connection methods supported by the specified terminals or connection elements.

Tightening torque specified by the manufacturer for a screw or bolted terminal connection.

Electrical or physical monitoring functions provided by the device, such as overvalue, undervalue, window, phase, frequency, current, power, insulation, temperature or level monitoring.

Electrical measurement principle used for evaluation of the monitored signal, such as true RMS, RMS, average-value or direct-value measurement.

Physical or electrical input technology used for acquisition of the monitored quantity, for example direct voltage, direct current, current transformer, resistance sensor, thermistor or conductive probe.

Current type accepted by the measuring input, such as AC, DC or AC/DC.

Number of independent physical measuring inputs provided by the device.

Indicates whether the measuring input is galvanically isolated from the supply, output or other relevant circuits.

Indicates that the monitoring device derives its operating power directly from the measured circuit and does not require a separate auxiliary supply.

Minimum signal frequency accepted by the measuring circuit for the declared monitoring or measurement function.

Maximum signal frequency accepted by the measuring circuit for the declared monitoring or measurement function.

Manufacturer-declared electrical resistance of the measuring input where applicable.

Manufacturer-declared accuracy of the measured value under the specified reference conditions.

Manufacturer-declared accuracy or tolerance of the configured monitoring threshold.

Manufacturer-declared repeatability of switching, alarm or monitoring operation under unchanged reference conditions.

Manufacturer-declared change of measuring or switching accuracy per unit change of ambient temperature.

Number of independently usable monitoring, switching or alarm thresholds provided by the device.

Methods available for setting monitoring thresholds, such as potentiometer, rotary selector, DIP switch, buttons, software or NFC configuration.

Indicates that the intentional delay between detection of a monitored fault condition and output operation can be adjusted.

Minimum configurable response delay between fault detection and monitoring output operation.

Maximum configurable response delay between fault detection and monitoring output operation.

Fixed manufacturer-declared intentional response delay where the monitoring device does not provide an adjustable delay.

Time required for the monitoring function or output to recover after the monitored quantity has returned to the permissible range.

Maximum supply interruption duration that can be tolerated without loss of the relevant operating or monitoring state.

Indicates support for monitoring whether the measured value remains inside or outside a defined lower-to-upper threshold window.

Indicates that the upper and lower limits of a monitoring window can be configured independently.

Number of discrete measurement ranges supported by the measuring input.

Indicates that the measuring range can be selected or configured by the user.

Method used to select the active measuring range, such as automatic range selection, rotary control, DIP switch, wiring selection or software configuration.

Operating principle of the monitoring relay output with respect to normal and fault conditions, such as normally energized, normally de-energized or selectable behaviour.

Defines whether monitoring thresholds are specified as absolute measured values, percentages of a nominal value or another manufacturer-defined reference.

Manufacturer-declared time from application of the control signal until the relay reaches its operated switching state.

Manufacturer-declared time from removal of the control signal until the relay returns to its released switching state.

Manufacturer-declared duration of mechanical contact bounce following relay contact operation.

Mechanical structure of an individual switching contact system, for example single, double or bifurcated contact.

Electrical contact material or contact-material system used by the relay switching contacts.

Maximum manufacturer-declared voltage that may be switched by the relay-output contacts.

Maximum manufacturer-declared current that may be switched by the relay-output contacts.

Minimum manufacturer-declared switching voltage for reliable operation of the relay contact.

Minimum manufacturer-declared switching current for reliable relay-contact operation.

Maximum continuous current permitted through a closed relay contact under the manufacturer-declared conditions.

Maximum short-duration inrush current permitted through the relay switching contact.

Maximum AC switching voltage of the relay output contact.

Maximum DC switching voltage of the relay output contact.

Indicates whether the product can measure and provide electrical voltage values.

Nominal voltage of the electrical circuit whose voltage condition is monitored by the device.

Lowest voltage that can be measured or monitored within the manufacturer-declared measuring range.

Highest voltage that can be measured or monitored within the manufacturer-declared measuring range.

Electrical voltage relationships measured by the device, for example line-to-line or line-to-neutral.

Indicates whether one or more voltage-monitoring threshold values can be adjusted.

Maximum intrinsic detection or response time for an overvoltage or undervoltage condition, excluding intentionally configured output delay where specified separately.

Maximum short-duration voltage that the measuring input can withstand without damage under manufacturer-declared conditions.

Maximum duration associated with the declared short-time voltage overload capability of the measuring input.

Maximum voltage that may be continuously applied to the measuring input without damage under manufacturer-declared conditions.

Minimum configurable absolute voltage threshold for overvoltage monitoring.

Maximum configurable absolute voltage threshold for overvoltage monitoring.

Minimum configurable overvoltage threshold expressed relative to the applicable nominal or reference voltage.

Maximum configurable overvoltage threshold expressed relative to the applicable nominal or reference voltage.

Minimum configurable absolute voltage threshold for undervoltage monitoring.

Maximum configurable absolute voltage threshold for undervoltage monitoring.

Minimum configurable undervoltage threshold expressed relative to the applicable nominal or reference voltage.

Maximum configurable undervoltage threshold expressed relative to the applicable nominal or reference voltage.

Number of phases of the electrical system for which the product is designed to be connected or used.

Configuration of live and neutral conductors of the electrical system supported by the product.

Voltage level relative to the nominal or reference voltage below which a phase is considered lost.

Maximum regenerated or feedback voltage relative to the normal phase voltage at which reliable phase loss detection is manufacturer-declared.

Maximum intrinsic time required to detect loss of a monitored phase.

Phase sequence regarded by the monitoring function as the correct sequence, where this is manufacturer-declared or configurable.

Maximum intrinsic time required to detect an incorrect phase sequence.

Indicates whether voltage unbalance measurement or calculation is supported.

Minimum configurable voltage unbalance or phase asymmetry threshold.

Maximum configurable voltage unbalance or phase asymmetry threshold.

Maximum intrinsic detection time for a phase or voltage asymmetry condition.

Indicates that neutral conductor monitoring parameters can be enabled, disabled or adjusted by the user.

Indicates whether the product can measure and provide electrical network frequency values.

Indicates whether one or more frequency-monitoring threshold values can be adjusted.

Lower limit of the electrical network or signal frequency at which product operation is permitted.

Upper limit of the electrical network or signal frequency at which product operation is permitted.

Maximum intrinsic detection or response time for an underfrequency or overfrequency condition.

Minimum configurable absolute threshold for underfrequency monitoring.

Maximum configurable absolute threshold for underfrequency monitoring.

Minimum configurable absolute threshold for overfrequency monitoring.

Maximum configurable absolute threshold for overfrequency monitoring.

Minimum configurable underfrequency threshold expressed relative to the nominal or reference frequency.

Maximum configurable underfrequency threshold expressed relative to the nominal or reference frequency.

Minimum configurable overfrequency threshold expressed relative to the nominal or reference frequency.

Maximum configurable overfrequency threshold expressed relative to the nominal or reference frequency.

Minimum configurable absolute hysteresis for frequency threshold monitoring.

Maximum configurable absolute hysteresis for frequency threshold monitoring.

Indicates whether the product can measure and provide electrical current values.

Lowest current that can be measured or monitored within the manufacturer-declared measuring range.

Highest current that can be measured or monitored within the manufacturer-declared measuring range.

Indicates that the measuring circuit supports connection through an external current transformer.

Indicates that the current transformer ratio used for measurement scaling can be configured in the device.

Minimum configurable primary current value used for current transformer scaling.

Maximum configurable primary current value used for current transformer scaling.

Standard secondary current ratings of external current transformers supported by the measuring input.

Maximum short-duration current that the measuring input can withstand without damage under manufacturer-declared conditions.

Maximum duration associated with the declared short-time current overload capability of the measuring input.

Maximum current that may be continuously applied to the measuring input without damage under manufacturer-declared conditions.

Indicates whether the product stores or provides minimum and maximum values of measured quantities.

Indicates that one or more current monitoring thresholds can be adjusted by the user.

Maximum intrinsic detection time for an overcurrent or undercurrent condition, excluding an intentionally configured response delay.

Minimum configurable absolute current threshold for overcurrent monitoring.

Maximum configurable absolute current threshold for overcurrent monitoring.

Minimum configurable overcurrent threshold expressed relative to the applicable nominal or reference current.

Maximum configurable overcurrent threshold expressed relative to the applicable nominal or reference current.

Minimum configurable absolute current threshold for undercurrent monitoring.

Maximum configurable absolute current threshold for undercurrent monitoring.

Minimum configurable undercurrent threshold expressed relative to the applicable nominal or reference current.

Maximum configurable undercurrent threshold expressed relative to the applicable nominal or reference current.

Indicates whether current unbalance measurement or calculation is supported.

Indicates support for monitoring the active component of current derived from current and phase relationship.

Minimum configurable threshold for active-current monitoring.

Maximum configurable threshold for active-current monitoring.

Indicates whether measurement of active, reactive, or apparent electrical power is supported.

Indicates that one or more power monitoring thresholds can be adjusted by the user.

Indicates that active electrical power is measured or calculated by the device.

Indicates that reactive electrical power is measured or calculated by the device.

Indicates that apparent electrical power is measured or calculated by the device.

Lowest active power value within the manufacturer-declared measurement range.

Highest active power value within the manufacturer-declared measurement range.

Minimum configurable absolute active-power monitoring threshold.

Maximum configurable absolute active-power monitoring threshold.

Indicates support for detection or monitoring of active power flowing in the reverse direction.

Indicates that the device can distinguish and monitor the direction of active power flow.

Maximum intrinsic time required to detect an active-power threshold violation.

Indicates that the electrical power factor is measured or calculated by the device.

Indicates that one or more power-factor monitoring thresholds can be adjusted by the user.

Lowest power-factor value within the manufacturer-declared measurement range.

Highest power-factor value within the manufacturer-declared measurement range.

Minimum configurable threshold value for power-factor monitoring.

Maximum configurable threshold value for power-factor monitoring.

Indicates that the device can distinguish between leading and lagging power-factor conditions.

Maximum intrinsic time required to detect a power-factor threshold violation.

Minimum configurable absolute hysteresis of the power-factor monitoring threshold.

Maximum configurable absolute hysteresis of the power-factor monitoring threshold.

Electrical network earthing systems with which the product may be used in the declared configuration.

Indicates whether the design permits the neutral busbar or conductor to be insulated from the enclosure.

Indicates whether a separate functional earth connection is provided that does not replace the PE protective connection.

Indicates that the device measures insulation resistance of the monitored electrical system against earth.

Lowest insulation resistance value within the manufacturer-declared measurement range of the insulation monitoring function.

Highest insulation resistance value within the manufacturer-declared measurement range of the insulation monitoring function.

Indicates that the insulation resistance alarm or response threshold can be adjusted by the user.

Minimum configurable insulation resistance alarm or response threshold.

Maximum configurable insulation resistance alarm or response threshold.

Indicates that a separate insulation resistance warning or pre-alarm threshold is available in addition to the main alarm threshold.

Minimum configurable insulation resistance warning or pre-alarm threshold.

Maximum configurable insulation resistance warning or pre-alarm threshold.

Maximum manufacturer-declared intrinsic time required to detect an insulation resistance fault under specified system conditions.

Manufacturer-declared measuring voltage generated or applied by the insulation monitoring circuit.

Maximum measuring current generated by the insulation monitoring circuit under manufacturer-declared conditions.

Manufacturer-declared internal DC resistance of the insulation monitoring measuring circuit relative to the monitored system.

Manufacturer-declared measuring principle or test-signal method used to determine insulation resistance in the monitored system.

Maximum total system leakage capacitance to earth for which the insulation monitoring function is manufacturer-declared to operate correctly.

Indicates that the device can determine or display the system leakage capacitance to earth in addition to insulation resistance.

Upper limit of the manufacturer-declared system leakage capacitance measurement range.

Types of unearthed or impedance-earthed electrical systems for which insulation monitoring is manufacturer-declared, such as AC, DC or combined AC/DC systems.

Indicates that insulation resistance can be continuously monitored while the electrical system is energized and operating.

Indicates support for insulation monitoring or insulation fault detection while the monitored load or system is de-energized.

Indicates that insulation resistance can be evaluated separately for the positive and negative conductors of a DC system.

Indicates that the device can identify whether an insulation fault is associated with the positive or negative side of a DC system.

Indicates that a separate coupling device is required between the insulation monitor and the monitored electrical system.

Indicates compatibility with an external manufacturer-specified coupling device used to extend the monitored system voltage range.

Maximum monitored system voltage achievable when using the manufacturer-specified insulation monitoring coupling device.

Number of integrated analogue input channels.

Analogue signal, sensor or resistance input types supported by the product.

Resolution in bits of the analogue-to-digital conversion used for analogue inputs.

Lowest temperature that can be measured by the temperature monitoring input under manufacturer-declared conditions.

Highest temperature that can be measured by the temperature monitoring input under manufacturer-declared conditions.

Indicates that one or more temperature monitoring thresholds can be adjusted by the user.

Minimum configurable threshold for overtemperature monitoring.

Maximum configurable threshold for overtemperature monitoring.

Minimum configurable threshold for undertemperature monitoring.

Maximum configurable threshold for undertemperature monitoring.

Minimum configurable temperature hysteresis associated with a monitoring threshold.

Maximum configurable temperature hysteresis associated with a monitoring threshold.

Thermocouple characteristic types supported by the temperature measuring input, for example J, K, T, E, N, R, S or B.

Indicates that resistance of sensor wiring can be compensated automatically or by the measuring method.

Maximum sensor lead or line resistance permitted for manufacturer-declared temperature measurement performance.

Measurement or excitation current supplied by the device to a resistive temperature sensor where applicable.

Time interval used by the temperature measuring circuit to acquire or update the measured temperature.

Indicates support for cold-junction compensation when thermocouple inputs are used.

Minimum configurable threshold for temperature difference monitoring.

Maximum configurable threshold for temperature difference monitoring.

Number of independent thermistor sensor circuits evaluated by the protection relay.

Sensor-circuit resistance at which the thermistor protection relay changes to the trip or overtemperature state.

Sensor-circuit resistance below which reset or return from the thermistor trip state becomes possible.

Sensor-circuit resistance below which the thermistor input is interpreted as a short circuit.

Maximum permissible total cold-state resistance of the connected thermistor sensor circuit.

Maximum number of PTC thermistor sensors permitted in series in one sensor circuit where declared by the manufacturer.

Sensor-circuit resistance corresponding to operation of the thermistor warning or pre-alarm function.

Lowest electrode-to-electrode or electrode-to-reference resistance within the manufacturer-declared sensitivity range.

Highest electrode-to-electrode or electrode-to-reference resistance within the manufacturer-declared sensitivity range.

Indicates that the electrical sensitivity of the level measuring circuit can be adjusted for liquids with different conductivity.

Indicates that a dedicated common or reference electrode is required for conductive level measurement.

Manufacturer-declared electrical measuring voltage applied to the level probe circuit.

Electrical waveform or current type used by the level probe measuring circuit, such as AC, DC or pulsed measurement.

Maximum measuring current flowing through the level probe circuit under manufacturer-declared conditions.

Frequency of the AC or alternating measuring signal applied to conductive level probes where specified.

Maximum manufacturer-declared cable length between the level monitoring relay and the connected probe or electrode.

Maximum manufacturer-declared time required to complete one measurement and evaluation cycle of the monitoring function.

Total number of electrical connection points provided by the product.

Minimum conductor cross-section permitted by the connection system within its general conductor-size range.

Maximum conductor cross-section permitted by the connection system within its general conductor-size range.

Minimum rigid conductor cross-section permitted by an electrically and mechanically equivalent connection point.

Maximum rigid conductor cross-section permitted by an electrically and mechanically equivalent connection point.

Minimum flexible conductor cross-section permitted by the relevant connection point.

Maximum flexible conductor cross-section permitted by the relevant connection point.

Minimum flexible conductor cross-section with a ferrule without an insulating plastic collar permitted by the relevant connection point.

Maximum flexible conductor cross-section with a ferrule without an insulating plastic collar permitted by the relevant connection point.

Minimum flexible conductor cross-section with a ferrule and insulating plastic collar permitted by the relevant connection point.

Maximum flexible conductor cross-section with a ferrule and insulating plastic collar permitted by the relevant connection point.

Minimum cross-section of each of two conductors connected simultaneously using a TWIN ferrule.

Maximum cross-section of each of two conductors connected simultaneously using a TWIN ferrule.

Minimum conductor stripping length specified by the manufacturer.

Maximum conductor stripping length specified by the manufacturer.

Minimum rigid conductor cross-section suitable for direct insertion into a compatible connection without prior actuation of the release mechanism.

Maximum rigid conductor cross-section suitable for direct insertion into a compatible connection without prior actuation of the release mechanism.

Minimum conductor cross-section with a ferrule without an insulating plastic collar suitable for direct insertion into a compatible connection.

Maximum conductor cross-section with a ferrule without an insulating plastic collar suitable for direct insertion into a compatible connection.

Minimum conductor cross-section with a ferrule and insulating plastic collar suitable for direct insertion into a compatible connection.

Maximum conductor cross-section with a ferrule and insulating plastic collar suitable for direct insertion into a compatible connection.

Method or operator action used to open, actuate, or prepare the clamping mechanism before conductor insertion.

Method used to release and remove a connected conductor from the connection point.

Indicates whether an applicable conductor can be inserted directly without first opening the clamping mechanism using a tool or actuator.

Indicates whether normal conductor connection can be performed without using a separate hand tool.

Indicates whether visual feedback is provided to confirm correct conductor connection or the intended operating state of the clamping mechanism.

Indicates whether haptic feedback is provided to confirm correct conductor connection or attainment of the intended operating state by the mechanism.

Indicates whether a separate tool is required to release the connected conductor.

Type, size, or designation of the tool declared by the manufacturer for actuating the conductor-release mechanism.

Thread designation of the screw used in the conductor clamping mechanism, for example M2.5, M3, M4, or another manufacturer-declared designation.

Drive geometry of the screw head used to clamp the conductor in the terminal block.

Size or designation of the screwdriver, bit, or other tool required to operate the terminal screw.

Minimum tightening torque of the terminal screw, bolt, or nut declared by the manufacturer where a permissible range is specified.

Maximum tightening torque of the terminal screw, bolt, or nut declared by the manufacturer where a permissible range is specified.

Minimum cross-section of each of two equal rigid conductors that may be connected simultaneously to one clamping point.

Maximum cross-section of each of two equal rigid conductors that may be connected simultaneously to one clamping point.

Minimum cross-section of each of two equal flexible conductors that may be connected simultaneously to one clamping point.

Maximum cross-section of each of two equal flexible conductors that may be connected simultaneously to one clamping point.

Minimum cross-section of each of two equal flexible conductors fitted with separate ferrules without insulating collars and permitted for joint connection to one clamping point.

Maximum cross-section of each of two equal flexible conductors fitted with separate ferrules without insulating collars and permitted for joint connection to one clamping point.

Indicates whether the product material is classified as halogen-free according to the characteristics declared by the manufacturer.

Degree of enclosure protection against access to hazardous parts and ingress of solid objects and water, designated by the IP code.

Class of enclosure resistance to external mechanical impacts designated by the IK code.

Method or level of protection of the user against direct contact with hazardous live parts.

Indicates whether the design prevents finger access to hazardous live parts in the intended condition.

Indicates whether the design provides protection against accidental contact with hazardous live parts.

Classification of a material according to its ability to ignite, sustain combustion, and cease burning under a specified test.

Temperature of the heated wire used when testing the material or product against an ignition source.

Indicates that galvanic isolation is provided between the relevant electrical input and output circuits of the product.

Indicates that the manufacturer declares safe electrical separation between the relevant input and output circuits.

Indicates that the level monitoring function can protect a pump or process against operation without sufficient liquid.

Indicates that the level monitoring function can provide protection or alarm when the maximum permitted liquid level is reached.

Minimum ambient temperature at which normal operation of the product is permitted.

Maximum ambient temperature at which normal operation of the product is permitted.

Maximum permissible average ambient temperature over a consecutive 24-hour period.

Minimum ambient temperature permitted during storage of the product while not in operation.

Maximum ambient temperature permitted during storage of the product while not in operation.

Minimum ambient temperature permitted during transportation of the product.

Maximum ambient temperature permitted during transportation of the product.

Indicates whether permissible electrical or thermal loading must be reduced as temperature changes.

Temperature above which the permissible product load must be reduced.

Indicates whether the manufacturer has published the relationship between permissible product load and temperature.

Minimum relative air humidity permitted for the declared operating or test condition.

Maximum relative air humidity permitted for the declared operating or test condition.

Indicates whether the permissible humidity value applies only to non-condensing conditions.

Maximum altitude above sea level at which the product may be installed without exceeding the declared conditions.

Indicates whether the permissible product load must be reduced as installation altitude increases.

Altitude above sea level above which the permissible product load must be reduced.

Indicates whether the product's resistance to vibration has been verified under the declared conditions.

Indicates whether the product's resistance to short-duration mechanical shocks has been verified.

Indicates whether documentation is included in the product's standard supply.

Indicates whether a local human-machine interface (HMI) is provided for monitoring, configuration, or control.

Indicates whether the product has an integrated local display.

Technology or construction type of the product's integrated display.

Indicates whether the integrated display has a backlight.

Number of integrated LEDs used to indicate product status or operating modes.

Indicates whether the product can store an internal event log.

Maximum number of event records that can be stored in the product's internal log.

Indicates whether an integrated real-time clock is provided for timekeeping, event time-stamping, or time-based functions.

Number of integrated user keys or buttons available for local navigation, programming or control.

Manufacturer family, series or designation of compatible external coupling devices or coupling impedances.

Indicates that the device provides an auxiliary supply output for external active level sensors.

Indicates that current measured values can be shown on the integrated display.

Indicates that fault, warning or diagnostic messages can be shown on the local display.

Indicates that the display changes color or uses color coding to distinguish normal, warning, fault or configuration states.

Indicates whether one or more measured values can be stored, for example the latest, minimum, maximum, or a value associated with a fault event.

Indicates whether information about a fault condition, alarm, or protective operation can be retained after the cause of the event has disappeared.

Indicates whether the mode of storing or latching a fault condition can be configured.

Indicates whether an alarm or output state can automatically return to normal after the operating cause disappears, according to the product settings.

Indicates whether the delay can be adjusted during which a monitoring or protective function temporarily ignores the monitored condition after power-up or start.

Minimum available setting of the start-up delay for the monitoring or protective function.

Maximum available setting of the start-up delay for the monitoring or protective function.

Indicates whether the delay before an alarm or output state returns after the operating condition disappears can be adjusted.

Minimum available setting of the release delay for the alarm or output state.

Maximum available setting of the release delay for the alarm or output state.

Indicates whether the hysteresis between the operating threshold and release threshold can be adjusted.

Minimum available setting of switching or alarm hysteresis relative to the corresponding threshold.

Maximum available setting of switching or alarm hysteresis relative to the corresponding threshold.

Indicates whether an external wired input or external push-button is supported for initiating the specified TEST function.

Indicates whether an external wired input or external push-button is supported for performing the specified RESET function.

Indicates whether product settings can be protected against unauthorized modification by means of a specified mechanical, software, or password-based locking mechanism.

Indicates that the device can support automatic correction of phase sequence or direction of rotation through its switching outputs or associated switching arrangement.

Indicates that automatic phase sequence correction behaviour can be enabled, disabled or otherwise configured.

Indicates support for locating the faulty branch or circuit associated with an insulation fault, either internally or with compatible external equipment.

Number of insulation fault location channels directly supported or evaluated by the device where applicable.

Indicates that an open sensor circuit or broken sensor lead can be detected.

Indicates that a short circuit in the sensor circuit can be detected.

Maximum intrinsic time required to detect a supported sensor fault such as wire break or short circuit.

Indicates that the device can monitor the temperature difference between two measuring channels.

Indicates that the sensor type and related parameters can be configured separately for individual temperature measuring channels.

Indicates that different temperature sensor technologies can be operated simultaneously on separate measuring channels.

Indicates suitability for direct thermal monitoring of motor or generator windings using embedded temperature sensors.

Indicates support for a separate thermistor warning or pre-alarm sensor circuit in addition to the trip circuit.

Operating modes supported by the level monitoring function, such as filling, draining, minimum-level, maximum-level or two-point level control.

Indicates that liquid level can be detected by measuring electrical conduction between immersed electrodes.

Indicates that the electrode measuring circuit can be used to monitor changes in liquid conductivity or mixture conductivity.

Indicates that multiple level monitoring channels can operate independently with separate sensing or output logic.

Indicates that an electrically conductive tank wall may be used as the common reference electrode instead of a separate reference probe.

Indicates support for monitoring one defined level point using a sensing electrode and the applicable reference.

Indicates support for control between separate minimum and maximum level electrodes.

Indicates that relay logic is suitable for automatic filling control between defined liquid levels.

Indicates that relay logic is suitable for automatic draining control between defined liquid levels.

Indicates that the monitoring relay is intended to directly control a pump contactor or equivalent switching circuit according to liquid level.

Indicates that the device can be used for simple presence or absence detection of a conductive liquid.

Indicates support for a dedicated alarm or switching condition when the monitored liquid falls below the defined minimum level.

Indicates support for a dedicated alarm or switching condition when the monitored liquid reaches or exceeds the defined maximum level.

Indicates that faults in the connected level probe circuit can be detected or diagnosed by the device.

Supported timing behaviours between detection of a monitored condition and operation or release of the monitoring output, such as ON-delay, OFF-delay or instantaneous operation.

Indicates that individual monitoring functions can be independently enabled, disabled or configured.

Indicates that monitoring, warning or fault functions can be assigned by configuration to individual relay outputs.

Indicates that the device distinguishes different monitored fault conditions for indication, output assignment, display or communication instead of providing only one undifferentiated fault state.

Electrical parameters and source conditions that the device can monitor when making transfer decisions.

Indicates whether user-configurable functions can be assigned to one or more digital inputs.

Indicates whether user-configurable functions can be assigned to one or more digital outputs.

Indicates whether the product supports digital data exchange with external devices or systems.

List of supported digital data communication protocols.

List of supported physical or logical digital communication interfaces.

Indicates whether an integrated web server or web interface is provided for access to product functions.

Indicates whether specified product settings can be read or changed remotely through a supported communication interface.

Indicates whether a data-logging function is provided for recording supported measurements, states, or process parameters.

Indicates whether the user can configure the condition that triggers or starts data logging.

Indicates whether the product has a local TEST button for the specified functional check of the device.

Indicates whether the product has a separate local RESET button for performing the specified reset function.

Indicates whether the product has a local visual or mechanical indicator of operating, fault, or end-of-life status.

Types of local visual or mechanical status indication provided by the product design.

Indicates that device firmware can be updated by a manufacturer-supported procedure.

Indicates that the principal monitoring function can be selected or configured on the product, for example over-value, under-value or window monitoring.

Methods available for setting monitoring or switching threshold values.

Indicates that the delay between detection of the monitored fault condition and switching of the monitoring output can be adjusted.

Minimum configurable delay between detection of a monitored fault condition and output switching.

Maximum configurable delay between detection of a monitored fault condition and output switching.

Timing behaviour of the monitoring relay output with respect to appearance or disappearance of the monitored condition.

Indicates that the monitoring output can be configured between supported operating principles.

Voltage supervision functions supported by the product, such as overvoltage, undervoltage or window monitoring.

Indicates that the product evaluates or indicates phase-to-phase voltages of the monitored multiphase system.

Indicates that the product evaluates or indicates phase-to-neutral voltages of the monitored electrical system.

Indicates that interruption or loss of the neutral conductor can be detected or indicated by the product.

Indicates that neutral-conductor monitoring can be enabled, disabled or otherwise configured by the user.

Indicates that phase-sequence monitoring can be enabled, disabled or configured by the user.

Indicates support for an output/control arrangement intended to automatically correct an incorrect phase sequence using external switching equipment.

Indicates that the voltage criterion used to identify phase failure can be adjusted.

Indicates that the monitoring method is designed to detect a missing phase even when regenerative or back-fed voltage from the connected load is present.

Indicates that the permitted phase-voltage asymmetry or voltage-unbalance threshold can be adjusted.

Indicates support for monitoring the rate of change of frequency (ROCOF, df/dt).

Indicates that the measuring input automatically distinguishes between AC and DC current without manual selection.

Current supervision functions supported by the device.

Indicates that current can be monitored using an external measuring shunt.

Supported under-limit, over-limit, window and reverse-power monitoring functions for active, reactive or apparent power.

Indicates that the device can distinguish the direction of active power flow.

Power-factor supervision functions supported by the device.

Indicates that the device distinguishes inductive lagging and capacitive leading power-factor conditions.

Under-limit, over-limit and window monitoring functions for the active current component Ires.

Insulation-system monitoring and diagnostic functions supported by the product.

Indicates that the measuring algorithm automatically adapts to the existing system leakage capacitance.

Indicates that the product can automatically test its internal monitoring or measuring functionality.

Indicates that an internal functional self-test can be initiated manually.

Indicates monitoring of the electrical connection between the device measuring terminals and the monitored system.

Indicates monitoring of the device connection to protective earth or the reference earth connection required by the measuring circuit.

Indicates that an external coupling device or coupling impedance can be used to extend the supported monitored-system voltage range or application range.

Indicates that an external coupling device or coupling impedance is required for the declared application or monitored-system voltage range.

Indicates that the device can inject a locating current for use by a compatible insulation fault location system.

Indicates that the device measures and evaluates an actual temperature value rather than only a thermistor resistance state.

Temperature supervision functions supported by the product.

Indicates detection of an open sensor circuit or interrupted sensor wire.

Indicates detection of a short circuit in the temperature sensor measuring circuit.

Indicates that wire-break detection is performed dynamically during normal monitoring operation.

Indicates compatibility with PTC thermistor sensors of the Type A characteristic used for built-in thermal protection of rotating electrical machines.

Indicates that short-circuit monitoring of the PTC sensor circuit can be enabled, disabled or otherwise configured.

Level monitoring, pump protection and conductivity-related functions supported by the product.

Indicates that a dedicated common or reference electrode is required for normal conductive level sensing.

Indicates that direct probe-based level detection requires an electrically conductive liquid or medium.

Indicates that multiple measured quantities or monitoring functions can be evaluated simultaneously.

Indicates that the device identifies or reports different monitored fault causes separately rather than providing only one collective fault indication.

Indicates that digital input functions such as reset, inhibit, parameter-set selection or other control commands can be configured.

Indicates that the active parameter or setting set can be changed during operation by a supported control method.

Methods supported for selection or switching of the active parameter set.

Indicates that one parameter set can be copied to another internal parameter set or configuration slot.

Indicates that device parameters and configuration data can be backed up to an external system or supported storage medium.

Indicates that previously stored device parameters or configuration data can be restored to the product.

Indicates that backed-up parameters can be transferred automatically or semi-automatically to a replacement device through a supported communication system.

Indicates that device settings can be configured directly on the product using integrated controls or a local HMI.

Types of measured values that can be retained by the product, such as last, minimum, maximum or fault-associated values.

Indicates that stored events, warnings or faults can include a date and/or time stamp.

Indicates that measured-value trends or historical sequences can be stored, transmitted or evaluated.

Indicates that current measured values can be read by an external controller, software system or communication master.

Indicates whether a latched trip, fault, or alarm state can be reset remotely through a supported command or interface.

Indicates that an internal test or test function can be initiated remotely through a supported interface.

Indicates that warning, fault, status or diagnostic information can be transmitted through a supported digital communication interface.

Regions or markets for which the manufacturer declares regulatory or certification compliance of the product.

Certification, market-approval, or conformity marks applicable to the product.

Primary normative document or standard according to which the manufacturer classifies or assesses the product.

Additional normative documents and standards declared by the manufacturer as applicable to the product.

Indicates whether an official declaration of conformity is available for the product.

Indicates whether a certificate relating to the declared certification or conformity of the product is available.

Identification number of the certificate relating to the product or its certified version.

Name of the organization that issued the certificate or performed the relevant conformity assessment.

Indicates whether the product was tested by an organization independent of the manufacturer.

Indicates whether the CE marking is applied to the product where applicable.

Indicates whether the UKCA marking is applied to the product where applicable.

Indicates whether the EAC marking is applied to the product where applicable.

Indicates whether the product has a declared UL Listed certification or recognition status.

Indicates whether the product has a declared UL Recognized certification or recognition status.

Indicates whether the cULus mark is applied to the product where applicable.

Indicates whether the product has a declared CSA certification or recognition status.

Indicates whether the product has a declared TÜV certification or recognition status.

Indicates whether the product has a declared VDE certification or recognition status.

Indicates declared conformity of the product with applicable ATEX requirements for equipment intended for potentially explosive atmospheres.

Indicates whether product compliance with applicable RoHS restrictions on hazardous substances has been declared.

Indicates whether the manufacturer declares compliance of the product with applicable REACH Regulation requirements.

Indicates whether the product falls within the scope of WEEE requirements for waste electrical and electronic equipment.

Compliance with applicable IEC 60947-5-1 requirements for control-circuit devices and switching elements.

Compliance with applicable IEC 61557-8 requirements for insulation monitoring devices in IT systems.

Compliance with applicable IEC 61557-9 requirements for insulation fault location systems in IT systems.

Compliance with applicable IEC 60947-8 requirements for control units used with built-in PTC thermal protection of rotating electrical machines.

Compliance with applicable IEC 60255-1 common requirements for measuring relays and protection equipment.

Compliance with applicable IEC 60255-26 electromagnetic compatibility requirements for measuring relays and protection equipment.

Compliance with applicable IEC 60255-27 product safety requirements for measuring relays and protection equipment.

Mass of the product itself, excluding transport packaging, additional accessories, and external equipment.

Mass of the product together with its individual packaging and the accessories included in it.

External horizontal dimension of the product's individual package.

External vertical dimension of the product's individual package.

External depth dimension of the product's individual package.

Design type of the product's individual or transport packaging.

Number of individual products contained in one packaging unit at the specified level.

Country of origin of the goods declared for customs or commercial purposes.

Commodity code under the international Harmonized Commodity Description and Coding System.

Commodity code under the Combined Nomenclature of the European Union.