A wide range of coupling relays is available for electrical isolation, amplification and signal adjustment between the controller and I/O.

• Narrow, compact design with relay output (3TX7, 3RQ3)
• Narrow, compact design with semiconductor output (3TX7, 3RQ3)
• With plug-in relay (3TX7, 3RQ3, LZS)
• In industrial enclosure (3RS18)