Siemens Industrial Controls 3TX7112-1DF13C 8-Pin DPDT Octal Relay 16A 120V

The Siemens Industrial Controls 3TX7112-1DF13C 8-Pin DPDT Plug-In Relay is an electrical multi-circuit switch in the HVAC systems. It is mainly used in offering two independent sets of changeover contacts that are either open or closed, depending on a 120V control signal. It works on the concept of charging an internal coil, which is used to shift the positions of contacts to provide reliable routing of circuits. It is achieved through fitting in a matching relay socket and joining them where required. This is used to arrange control logic and to enable the control of complex chains of operation.