Modbus I/O Module
Remote I/O module communicating over Modbus for connecting sensors and actuators.
A Modbus I/O module exposes digital, analogue, or specialized input and output channels through Modbus RTU, Modbus TCP, or another supported protocol implementation. It may be a standalone device or part of a distributed I/O station.
Key characteristics include channel count and type, signal voltages and ranges, accuracy, resolution, output load capability, filtering, diagnostics, and mapping of channels to Modbus registers and coils. For serial devices, RS-485 parameters, addressing, and data rate are important.
Selection criteria include Modbus role and variant, register map, data refresh time, galvanic isolation, power supply, environmental conditions, and configuration method.
This subcategory includes local and remote Modbus I/O modules with digital and analogue inputs and outputs.
Modbus I/O Module
General6
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.
Dimensions4
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.
Mass of the product itself, excluding transport packaging, additional accessories, and external equipment.
Capacity and Layout21
Number of integrated physical Ethernet communication ports.
Number of integrated physical RS-485 communication interfaces.
Physical and architectural forms through which the automation system can be expanded.
Physical or communication connection methods used between the base system and expansion modules or stations.
Minimum configurable station or node address where numeric node addressing is used.
Maximum configurable station or node address where numeric node addressing is used.
Indicates that modules communicate through a rack, base, terminal or equivalent internal backplane bus.
General architecture of the internal backplane or module bus.
Number of electrically distinct field-potential groups provided or supported by the product.
Maximum number of dedicated power-feed modules supported within one station.
Number of separate field or module-bus power feed points provided by the product.
Number of electrically separated field-supply segments provided or supported by the product.
Number of integrated physical RS-232 communication interfaces.
Number of integrated physical RS-422 communication interfaces.
Maximum number of simultaneous outbound Modbus TCP client connections.
Maximum number of simultaneous incoming Modbus TCP server connections.
Maximum number of Modbus RTU remote devices that can be handled by the product when operating as a master or client.
Maximum total number of simultaneous CIP connections supported by the product.
Maximum number of simultaneous implicit EtherNet/IP I/O connections.
Maximum number of simultaneous TCP connections available to EtherNet/IP communication services.
Number of physical serial ports that can be configured for more than one electrical serial standard.
Materials and Finish8
Primary material from which the product is manufactured.
Grade, alloy, class, or technical designation of the product's primary material.
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.
Technological surface treatment applied to modify its protective, mechanical, or decorative properties.
Type of protective, functional, or decorative coating applied to the surface.
Material or chemical basis of the coating applied to the surface of the product or one of its parts.
Mounting and Installation16
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.
Type of surface or supporting base to which the product may be fixed.
Number of holes provided in the product for mechanical fixing.
Diameter of the hole provided for a fixing element used when mounting the product.
Geometric shape of the hole intended for mechanical fixing of the product.
Distance between the centres of mounting holes in the horizontal direction.
Profile type of the DIN rail installed in the product or specified for compatible mounting.
Distance between the centres of mounting holes in the vertical direction.
Horizontal dimension of the mounting pattern between the outermost fixing points of the product.
Vertical dimension of the mounting pattern between the outermost fixing points of the product.
Size designation of the screw, bolt, or other threaded fastener used for mounting the product.
Designation of the thread provided in the product's mounting holes or fixing elements.
Tightening torque recommended or permitted for fasteners during product installation.
Indicates whether the required fasteners are included with the product.
Indicates use of mechanical keying to prevent installation of an incompatible module or terminal unit.
Electrical Parameters72
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.
Maximum voltage at which continuous operation of the product is permitted under the conditions declared by the manufacturer.
Minimum voltage at which the manufacturer guarantees the intended operating mode of the product.
AC frequency assigned to the product for normal operating conditions.
Indicates that the sensor requires an external auxiliary power supply.
Maximum auxiliary supply current required by the sensor.
Supported serial communication baud rates for interfaces such as RS-232, RS-422, RS-485 or equivalent serial buses.
Supported data-word lengths for serial communication.
Parity modes supported by the serial communication interface.
Supported number of stop bits in serial communication frames.
Minimum configurable logical address on a supported serial communication network.
Maximum configurable logical address on a supported serial communication network.
Supported nominal Ethernet physical-layer link speeds.
Nominal electrical input voltage for which the power conversion device is designed.
Minimum continuous input voltage within the manufacturer-declared operating input range.
Maximum continuous input voltage within the manufacturer-declared operating input range.
Maximum manufacturer-declared input current under the specified operating conditions.
Maximum active electrical power drawn by the device from its input source under manufacturer-declared conditions.
Manufacturer or industry designation of the local or remote expansion bus.
Maximum or nominal manufacturer-declared data rate of the expansion bus.
Manufacturer-declared cyclic update time of the expansion bus under specified conditions.
Maximum manufacturer-supported cable length of the expansion bus. Stored in millimetres; the UI may display metres.
Nominal internal system or backplane supply voltage provided to connected modules.
Maximum aggregate current available to connected modules through the internal backplane or module bus.
Maximum aggregate electrical power available to modules through the internal backplane supply.
Maximum backplane or system-bus current available to one module position.
Maximum backplane electrical power available to one module position.
Nominal supply voltage for the logic, electronics or internal system side of the device.
Minimum permissible continuous voltage of the system or logic supply.
Maximum permissible continuous voltage of the system or logic supply.
Maximum current drawn or required from the system or logic supply.
Maximum electrical power required from the system or logic supply.
Electrical current type accepted by the field-side supply circuit.
Nominal voltage applied to the field-side power circuit.
Minimum permissible continuous field-side supply voltage.
Maximum permissible continuous field-side supply voltage.
Maximum aggregate field-side supply current that the product or station can carry.
Maximum aggregate power available or transferable through the field-side supply circuit.
Nominal voltage provided by the integrated sensor supply output.
Maximum continuous current available from the integrated sensor supply output.
Nominal voltage provided for external actuators.
Maximum continuous current available for external actuators.
Maximum continuous current carried through the module power contacts.
Maximum manufacturer-declared operating voltage permitted on the module power contacts.
Maximum current that can be introduced through a field or station power-feed point.
Maximum operating voltage permitted at a field or station power-feed point.
Indicates local visual indication of one or more system or field power-supply states.
Indicates galvanic isolation between field power contacts and internal logic or system bus circuitry.
Maximum continuous current carried by one field-supply segment.
Physical transmission media supported by the Ethernet interfaces.
Physical connector types provided or supported for Ethernet communication.
Ethernet half-duplex and full-duplex operating modes supported by the interface.
Indicates automatic detection and correction of straight-through or crossover copper Ethernet wiring.
Maximum manufacturer-supported Ethernet cable length for the declared physical interface. Stored in millimetres; UI may display metres.
Packet-forwarding architectures supported by the integrated Ethernet switch.
Indicates support for a manufacturer-approved Ethernet network redundancy mechanism.
Network redundancy and rapid-recovery protocols supported by the Ethernet interface or integrated switch.
Indicates local indication of Ethernet physical-link status.
Indicates local indication of Ethernet transmit or receive activity.
Indicates support for copying traffic from one or more Ethernet ports to a monitoring port.
Indicates support for Ethernet frames larger than the standard frame size.
Maximum Ethernet frame size supported by the interface or integrated switch.
Connector types used for RS-232, RS-422, RS-485 or comparable serial communication interfaces.
Hardware or software flow-control modes supported by serial interfaces.
Maximum manufacturer-supported serial communication cable length under the declared conditions.
Indicates galvanic isolation between the serial communication interface and relevant internal circuitry.
Two-wire or four-wire electrical operating modes supported by the RS-485 interface.
Maximum number of RS-485 nodes supported on one manufacturer-declared bus segment.
Electrical serial interface standards selectable on configurable serial ports.
Protection and Safety24
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.
Mechanical impact energy that the product or enclosure can withstand in the specified test.
Enclosure type or rating under the NEMA system characterizing the conditions and types of external influences against which protection is provided.
Indicates whether the declared ingress protection of the enclosure has been verified by certification or testing.
Indicates detection of excessive current or power demand on the internal module or backplane supply.
Indicates galvanic isolation between separate field-potential groups.
Manufacturer-declared dielectric test voltage between isolated field-potential groups.
Indicates integrated overload protection of the field-side supply circuit.
Indicates integrated short-circuit protection of the field-side supply circuit.
Indicates protection of the field-side DC supply against reverse polarity.
Indicates protection of the system-side DC supply against reverse polarity.
Indicates monitoring or diagnostics of system-supply undervoltage.
Indicates monitoring or diagnostics of field-supply undervoltage.
Indicates galvanic isolation between field-side circuitry and the system, logic or internal bus.
Manufacturer-declared dielectric test voltage between field-side circuitry and system or logic circuitry.
Indicates integrated short-circuit protection of the sensor supply output.
Indicates integrated short-circuit protection of the actuator supply circuit.
Indicates integrated current limiting of the sensor supply output.
Indicates integrated current limiting of the actuator supply circuit.
Indicates galvanic isolation between independent field-supply segments.
Indicates galvanic isolation between the Ethernet physical interface and relevant internal circuitry.
Manufacturer-declared dielectric test voltage associated with Ethernet interface isolation.
Manufacturer-declared dielectric test voltage associated with serial-interface isolation.
Environmental Conditions16
Minimum ambient temperature at which normal operation of the product is permitted.
Maximum ambient temperature at which normal operation of the product is permitted.
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.
Minimum ambient temperature at which the manufacturer permits installation of the product.
Maximum ambient temperature at which the manufacturer permits installation of the product.
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.
Minimum altitude relative to sea level for which the manufacturer specifies permissible installation conditions.
Indicates whether the permissible product load must be reduced as installation altitude increases.
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.
Special Features64
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 that the logical device or slave address used by a serial communication protocol can be configured.
Supported methods for assigning network-layer addresses to the Ethernet interface.
Indicates support for Internet Protocol version 6 communication.
Indicates that loss or inactivity of a communication link can be detected by an internal communication watchdog.
Indicates that the timeout used to detect communication loss or inactivity can be configured.
Minimum configurable communication timeout.
Maximum configurable communication timeout.
Indicates that loss of an expected communication connection can generate a local or remote alarm or diagnostic condition.
Indicates that the product or module may be inserted, removed or replaced in an energized manufacturer-approved system without shutting down the remaining supply.
Indicates that communication activity or communication health statistics can be read for diagnostic purposes.
Indicates that communication errors can be accumulated and read through the product diagnostics.
Indicates that the expansion or remote I/O bus supports a manufacturer-approved redundant communication path.
Indicates diagnostic monitoring of remote I/O stations, modules or communication status.
Methods supported for assigning or obtaining the network or station address of an automation or remote I/O station.
Indicates that local or remote expansion modules can be automatically identified and assigned logical addresses.
Indicates that an assigned module or station address can be retained across power cycles or module replacement where supported.
Indicates that the automation system can monitor or validate the available backplane power budget against installed module consumption.
Indicates automatic detection of whether an expected expansion or I/O module is physically present.
Indicates that installed modules can be automatically identified by type or manufacturer-defined module identity.
Indicates that configured module identity or compatibility is electronically checked against the installed module.
Indicates detection of a module whose type or configuration differs from the expected system configuration.
Indicates that insertion or removal of a module can be detected and reported by the automation system.
Indicates that supported hardware or I/O configuration changes can be applied while the controller remains in RUN mode.
Indicates that installed expansion modules can be automatically incorporated into the supported system configuration.
Indicates that configuration parameters of expansion modules can be backed up by the controller, coupler or engineering system.
Indicates that a compatible replacement module can restore the required configuration without manually modifying the user application.
Default or configurable output behavior when communication with the controlling device or network is lost.
Indicates that configuration or parameter data associated with individual modules can be stored persistently.
Indicates that a separate supply for logic, electronics or internal system operation is required.
Indicates that a separate field-side supply is required for I/O, sensors, actuators or field electronics.
Indicates that field I/O power can be supplied independently from the system or logic supply.
Indicates that the device provides an integrated supply output intended for external sensors.
Indicates that the device provides an integrated supply connection or output intended for external actuators.
Indicates that the module includes power contacts used to distribute field potential between adjacent modules.
Indicates that field power can be passed through the module to adjacent modules by integrated power contacts.
Indicates that the module or station architecture allows separate field-potential groups to be created.
Indicates that separate potential groups may be electrically bridged using a manufacturer-approved connection method.
Indicates support for a dedicated module used to feed or refresh field-side power within an I/O station.
Indicates that a dedicated power-feed module is required for the specified station configuration.
Indicates diagnostic monitoring of the system or logic supply.
Indicates diagnostic monitoring of the field-side supply.
Indicates support for IEEE Ethernet automatic negotiation of link parameters.
Indicates diagnostic monitoring of individual Ethernet ports and link states.
Indicates that traffic or error statistics are available for individual Ethernet ports.
Indicates that bus termination can be applied to the RS-485 interface.
Indicates that an RS-485 termination resistor is integrated into the product.
Nominal resistance of the integrated or manufacturer-declared RS-485 bus termination.
Indicates support for bias resistors used to establish a defined idle state on the RS-485 bus.
Indicates integrated or manufacturer-supported fail-safe biasing for a defined RS-485 idle state.
Indicates that manufacturer-approved line termination can be applied to the RS-422 interface.
Indicates that communication-interface faults, states or network conditions can be diagnosed by the product.
Modbus communication roles supported by the product.
Standard Modbus function codes directly supported by the product.
Indicates support for applicable Modbus broadcast requests.
Indicates that the product can route or gateway Modbus requests between supported Modbus networks or transports.
Indicates support for manufacturer-declared Modbus communication or protocol diagnostics.
EtherNet/IP Scanner, Adapter and explicit-message communication roles supported by the product.
Indicates support for CIP explicit request-response messaging over EtherNet/IP.
Indicates support for cyclic or real-time CIP I/O connections over EtherNet/IP.
Indicates support for multicast transport of applicable EtherNet/IP I/O data.
Indicates that a manufacturer-provided EtherNet/IP EDS device-description file is available.
Standards and Compliance11
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 separate manufacturer declaration concerning declared product characteristics or conformity is available.
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.
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.
Logistics10
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.
Country in which the product was manufactured or its principal manufacturing operation was performed.
Commodity code under the international Harmonized Commodity Description and Coding System.
Commodity code under the Combined Nomenclature of the European Union.