Schneider Electric TM3DM8RG Discrete I Module

Schneider Electric TM3DM8RG is a Modicon TM3 digital I/O expansion module that provides eight discrete I/O channels: four 24 V DC inputs and four relay outputs. The input side is Type 1 (IEC/EN 61131-2) and supports sink or source logic with a shared input line, while the output side consists of four 2 A NO relays rated for 24 V DC or 240 V AC with a shared output line. The module uses a removable spring-terminal block (TM3DM8RG) and is designed for compact, interlocking installation in TM3 systems; screw-terminal variants exist as TM3DM8R. Wiring is unshielded, with a typical maximum field wiring length of 30 meters (98 feet). It weighs about 95 g and carries IP20 protection, suitable for common industrial environments. Operating temperature ranges from -10°C to 55°C, enabling reliable performance across a wide ambient range. Each channel features a green status LED to indicate active inputs and outputs, aiding on-site diagnostics. The TM3DM8RG is a dedicated expansion option for Modicon TM3 controllers, enabling straightforward augmentation of discrete I/O for sensor and actuator interfacing, machine control panels, and compact automation setups that require reliable 24 V logic and 2 A relay drive in a single, pluggable module.