TRASA3 Knowledge Base

Electrical Component Parameter Reference

An open technical reference for electrical component types, their applications, and selection parameters.

This material is also available in PL and RU.

Device description

RS-485 Interface

Industrial interface module or device for connecting equipment to a differential RS-485 serial communication line.

An RS-485 interface provides physical data transmission over a balanced two-wire or four-wire serial line. It may be integrated into a controller or implemented as a standalone interface module.

Important characteristics include port count, 2-wire/4-wire mode, maximum data rate, permissible line length, galvanic isolation, isolation voltage, termination, and bus biasing. Supported node count, ESD/surge protection, and connector type are also relevant.

The interface may carry Modbus RTU/ASCII, manufacturer-specific protocols, and other serial protocols. Selection should treat the physical layer independently from the particular application protocol.

Components in this subcategory

This subcategory includes RS-485 modules and devices for controllers, meters, drives, sensors, and other industrial equipment.

Available parameters

RS-485 Interface

115 parameters
General6
Product Series

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

Application

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

Intended Use

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

Installation Location

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

Installation Environment

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

Orientation

Permissible spatial orientation of the component during installation and operation.

Dimensions4
Widthmm

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

Heightmm

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

Depthmm

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

Net Weightkg

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

Capacity and Layout2
RS-485 Port Count

Number of integrated physical RS-485 communication interfaces.

Configurable Serial Combo Port Count

Number of physical serial ports that can be configured for more than one electrical serial standard.

Materials and Finish8
Material

Primary material from which the product is manufactured.

Material Grade

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

Color

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

RAL Color

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

Surface Finish

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

Surface Treatment

Technological surface treatment applied to modify its protective, mechanical, or decorative properties.

Coating Type

Type of protective, functional, or decorative coating applied to the surface.

Coating Material

Material or chemical basis of the coating applied to the surface of the product or one of its parts.

Mounting and Installation15
Mounting Type

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

Mounting Method

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

Mounting Surface

Type of surface or supporting base to which the product may be fixed.

Number of Mounting Holes

Number of holes provided in the product for mechanical fixing.

Mounting Hole Diametermm

Diameter of the hole provided for a fixing element used when mounting the product.

Mounting Hole Shape

Geometric shape of the hole intended for mechanical fixing of the product.

Horizontal Mounting Hole Spacingmm

Distance between the centres of mounting holes in the horizontal direction.

DIN Rail Type

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

Vertical Mounting Hole Spacingmm

Distance between the centres of mounting holes in the vertical direction.

Mounting Pattern Widthmm

Horizontal dimension of the mounting pattern between the outermost fixing points of the product.

Mounting Pattern Heightmm

Vertical dimension of the mounting pattern between the outermost fixing points of the product.

Mounting Screw Size

Size designation of the screw, bolt, or other threaded fastener used for mounting the product.

Mounting Thread

Designation of the thread provided in the product's mounting holes or fixing elements.

Mounting Tightening TorqueNm

Tightening torque recommended or permitted for fasteners during product installation.

Fasteners Included

Indicates whether the required fasteners are included with the product.

Electrical Parameters20
Supply Current Type

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

Rated VoltageV

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

Rated AC VoltageV

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

Rated DC VoltageV

Rated direct voltage assigned to the product by the manufacturer.

Maximum Operating VoltageV

Maximum voltage at which continuous operation of the product is permitted under the conditions declared by the manufacturer.

Minimum Operating VoltageV

Minimum voltage at which the manufacturer guarantees the intended operating mode of the product.

Rated FrequencyHz

AC frequency assigned to the product for normal operating conditions.

Supported Serial Baud Rates

Supported serial communication baud rates for interfaces such as RS-232, RS-422, RS-485 or equivalent serial buses.

Supported Serial Data Bits

Supported data-word lengths for serial communication.

Supported Serial Parity Modes

Parity modes supported by the serial communication interface.

Supported Serial Stop Bits

Supported number of stop bits in serial communication frames.

Minimum Serial Device Address

Minimum configurable logical address on a supported serial communication network.

Maximum Serial Device Address

Maximum configurable logical address on a supported serial communication network.

Serial Connector Types

Connector types used for RS-232, RS-422, RS-485 or comparable serial communication interfaces.

Supported Serial Flow Control Modes

Hardware or software flow-control modes supported by serial interfaces.

Maximum Serial Cable Lengthmm

Maximum manufacturer-supported serial communication cable length under the declared conditions.

Galvanically Isolated Serial Port

Indicates galvanic isolation between the serial communication interface and relevant internal circuitry.

Supported RS-485 Operating Modes

Two-wire or four-wire electrical operating modes supported by the RS-485 interface.

Maximum RS-485 Node Count

Maximum number of RS-485 nodes supported on one manufacturer-declared bus segment.

Supported Serial Port Modes

Electrical serial interface standards selectable on configurable serial ports.

Protection and Safety6
IP Rating

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

IK Rating

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

Impact EnergyJ

Mechanical impact energy that the product or enclosure can withstand in the specified test.

NEMA Enclosure Rating

Enclosure type or rating under the NEMA system characterizing the conditions and types of external influences against which protection is provided.

Ingress Protection Certified

Indicates whether the declared ingress protection of the enclosure has been verified by certification or testing.

Serial Port Isolation Test VoltageV

Manufacturer-declared dielectric test voltage associated with serial-interface isolation.

Environmental Conditions16
Minimum Operating Temperature°C

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

Maximum Operating Temperature°C

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

Minimum Storage Temperature°C

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

Maximum Storage Temperature°C

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

Minimum Transport Temperature°C

Minimum ambient temperature permitted during transportation of the product.

Maximum Transport Temperature°C

Maximum ambient temperature permitted during transportation of the product.

Minimum Installation Temperature°C

Minimum ambient temperature at which the manufacturer permits installation of the product.

Maximum Installation Temperature°C

Maximum ambient temperature at which the manufacturer permits installation of the product.

Minimum Relative Humidity%

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

Maximum Relative Humidity%

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

Non-Condensing Humidity

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

Maximum Installation Altitudem

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

Minimum Installation Altitudem

Minimum altitude relative to sea level for which the manufacturer specifies permissible installation conditions.

Altitude Derating Required

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

Vibration Resistant

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

Mechanical Shock Resistant

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

Special Features17
Communication Supported

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

Communication Protocols

List of supported digital data communication protocols.

Communication Interfaces

List of supported physical or logical digital communication interfaces.

Configurable Serial Device Address

Indicates that the logical device or slave address used by a serial communication protocol can be configured.

Communication Watchdog Supported

Indicates that loss or inactivity of a communication link can be detected by an internal communication watchdog.

Configurable Communication Timeout

Indicates that the timeout used to detect communication loss or inactivity can be configured.

Minimum Communication Timeouts

Minimum configurable communication timeout.

Maximum Communication Timeouts

Maximum configurable communication timeout.

Communication Failure Alarm Supported

Indicates that loss of an expected communication connection can generate a local or remote alarm or diagnostic condition.

Communication Statistics Supported

Indicates that communication activity or communication health statistics can be read for diagnostic purposes.

Communication Error Counter Supported

Indicates that communication errors can be accumulated and read through the product diagnostics.

RS-485 Termination Supported

Indicates that bus termination can be applied to the RS-485 interface.

Integrated RS-485 Termination

Indicates that an RS-485 termination resistor is integrated into the product.

RS-485 Termination ResistanceΩ

Nominal resistance of the integrated or manufacturer-declared RS-485 bus termination.

RS-485 Biasing Supported

Indicates support for bias resistors used to establish a defined idle state on the RS-485 bus.

RS-485 Fail-Safe Biasing Supported

Indicates integrated or manufacturer-supported fail-safe biasing for a defined RS-485 idle state.

Communication Diagnostics Supported

Indicates that communication-interface faults, states or network conditions can be diagnosed by the product.

Standards and Compliance11
Conformity Regions

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

Certification and Conformity Marks

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

Primary Product Standard

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

Additional Standards

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

Declaration of Conformity Available

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

Manufacturer Declaration Available

Indicates whether a separate manufacturer declaration concerning declared product characteristics or conformity is available.

Certificate Available

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

Certificate Number

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

RoHS Compliant

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

REACH Compliant

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

WEEE Applicable

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

Logistics10
Gross Weightkg

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

Package Widthmm

External horizontal dimension of the product's individual package.

Package Heightmm

External vertical dimension of the product's individual package.

Package Depthmm

External depth dimension of the product's individual package.

Packaging Type

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

Units per Package

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

Country of Origin

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

Country of Manufacture

Country in which the product was manufactured or its principal manufacturing operation was performed.

HS Code

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

Combined Nomenclature Code

Commodity code under the Combined Nomenclature of the European Union.