TM3DM8RG is Schneider Electric’s 8‑channel digital I/O expansion module for Modicon TM3 controllers, delivering 4 discrete inputs and 4 relay outputs with a spring-terminal block. It operates at 24 V DC with an input current of 7 mA per input and uses a removable spring terminal block (5.08 mm pitch) for straightforward field wiring. This RG variant is the spring-terminal version of the TM3DM8R family and is designed to plug into a TM3 I/O rack to extend available I/O on a TM3 system. Typical applications include sensing devices and switches and driving low‑current relay coils in machine control and automation panels.
