Coupling relays

Coupling relays are an indispensable part of industrial automation, where reliability, safety, and efficiency are of great importance. Rely on our wide range of solid-state relays and electromechanical relays, available as plug-in versions or as complete modules. Coupling relays, force-guided coupling relays, highly compact relay modules, and relays for the Ex area also help achieve high system availability in your application.

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Comparison of relay modules Electronic and electromechanical coupling relays: In use worldwide for your application

Finding the right relays for an application is not always easy. We hope that this overview provides a little guidance. Criteria such as the number of contacts, bridge system, scope of functions and function extension, approvals, certification, and manufacturer’s declarations, option for protecting loads, and application with safe feedback provide a perfect starting point. Find the right relay modules for your application in our broad product range.


	Highly compact relay modules PLC-INTERFACE	Universal industrial relay system RIFLINE complete
Connection technology	Push-in, screw	Push-in
Number of contacts	Up to 2 changeover contacts	Up to 4 changeover contacts
Bridge system	FBST...-PLC... continuous plug-in bridges	CLIPLINE complete FBS... plug-in bridges
Scope of functions	Wide range of functions in a highly compact design and industry-specific electronic versions	Standard functions in various designs with multi-position relays
Approvals, certification, and manufacturer’s declarations	UL and CSA incl. HazLoc, DNV, ATEX, IECEx, CCC, CCC Ex, EAC, EAC Ex, KCs, Railway, CB Scheme	UL, CSA, DNV, CCC, EAC, CB Scheme (Ex approvals for RIF-2)
Function extension	Connection to system cabling and programmable logic relay system	Connection to system cabling (RIF-1)
Option for protecting loads	Pluggable fuse adapter, integrated circuit breaker	Pluggable fuse adapter (RIF-0)
Application with safe feedback	Versions with 2-pos. relay modules with force-guided contacts	Consistent product range with 2- and 4-pos. relay modules with force-guided contacts
	To the product list	To the product list

New products

Highly compact force-guided relay module on a DIN rail

Network-capable PLC-INTERFACE Ethernet gateway remote relay system on a DIN rail

PLC-INTERFACE with circuit breaker on the DIN rail

PLC-INTERFACE inverter module on a DIN rail

Highly compact force-guided relay modules

Six-position with Push-in connection technology

The highly compact RIFLINE complete relay module switches reliably with six force-guided contacts and Push-in connection technology. Benefit from A2 potential distribution via plug-in bridges on the input side and reliable feedback in your application.

Main features

Push-in connection technology
Overall width of just 20.9 mm
Relay module with 6-position, force-guided relay
A2 potential distribution via plug-in bridges on the input side
Reliable feedback

Your Advantages

Space-saving switching with a width of just 20.9 mm
More force-guided contacts with the six-position relay
Quick and easy cabling of the relay modules with Push-in connection technology
Simple potential distribution with plug-in bridges on the input side

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Network-capable remote relay system

Multi-protocol connection to the controller

The modular remote relay system with flexible channel assignment supports you in simple applications with up to 56 IO channels. Benefit from high flexibility and intuitive integration with compatibility with common control software.

Main features

Multi-protocol connection: PROFINET, EtherNet/IP, Modbus/TCP
Simple integration into the control system software via device description files
Compatible with PLC-INTERFACE relay and analog modules
Temperature range: -40°C ... +60°C
Maximum number of channels: up to 56 channels

Your Advantages

Flexible channel configuration (DI, DO, AI, AO) and compact design for simple applications with small to medium numbers of channels in the decentral control box
Multi-protocol connection with an innovative network module with high-performance chipset (PROFINET Class C and S2 redundancy)
Intuitive and fast integration into the control level due to compatibility with established control software

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Relay modules – switching and fuse protection

Highly compact circuit breaker

PLC-INTERFACE offers the innovative combination of a relay interface and circuit breaker in an overall width of just 6.2 mm, for more space in the control cabinet. The nominal current and shutdown behavior can be configured individually via DIP switches on the device.

Main features

Configurable with DIP switch
Electronic fuse (circuit breaker) with physical disconnection via relay
Compatible with PLC-INTERFACE relay modules
Easy function extension in existing systems
Space-saving design with an overall width of 6.2 mm

Your Advantages

Space-saving installation in the control cabinet with the combination of relay interface and circuit breaker in an overall width of 6.2 mm
Reduced wiring effort with comprehensive accessories, bridging options, and system cabling solutions
Easy system integration and function extension of existing installations due to compatibility with PLC-INTERFACE relay modules

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Relay modules – inverting signals

Compact signal inversion (PNP/NPN)

The inverter module is a 6.2 mm wide solution for inverting PNP into NPN signals and vice versa. With this coupling element, you can benefit from all the advantages of the PLC-INTERFACE relay system to implement different types of circuit with Push-in and screw connection technology.

Main features

Inverts the signals of ground switching NPN transistor outputs into positive switching PNP outputs, as well as signals from PNP into NPN switching signals
Overall width: 6.2 mm
Push-in or screw connection technology
Operating temperature range up to +60°C
Maximum transmission frequency: 15 kHz
Bridging options

Your Advantages

Easy signal inversion (PNP/NPN and vice versa) for the DIN rail
Space-saving control cabinet solution with a compact overall width of 6.2 mm
Flexible connection with versions with Push-in and screw connection technology
System compatibility with the PLC-INTERFACE relay system with bridging and marking options. Highly compact relay modules are part of the COMPLETE line system

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Switching devices for a sustainable future PLC-INTERFACE: Wide range of solutions for every application

Our PLC-INTERFACE range offers more than 700 products, manufactured in a fully automated manner, which meet the requirements of just about any application. With over 50 subsidiaries and more than 30 agencies around the world, we are always close by. This means that you receive bespoke advice, fast deliveries, and high-quality relay modules that perfectly suit your needs.

Our relays are certified and approved for global use. With PLC-INTERFACE, you can be sure of easy and safe use in almost any application. We offer a comprehensive range of certificates and approvals for current and future applications.