I/O Expansion Module | Schneider Electric TM2DRA8RT

The Schneider Electric TM2DRA8RT is a discrete output expansion module designed for Modicon M238 logic controllers, as well as compatible Twido and Advantys OTB control systems. It features 8 relay output channels capable of handling up to 2 A per channel with 1 Normally Open (NO) function per output. This module is ideal for switching heavy industrial loads while providing reliable electrical isolation between field devices and internal logic.

Output Characteristics and Ratings

The module incorporates 8 relay discrete outputs divided across 2 common points, with a maximum current rating of 7 A per output common. Each contact features a low contact resistance of 45 mOhm and supports a minimum switching current of 0.1 mA at 0.1 V DC. Response times are rated up to 10 ms from state 0 to state 1 and up to 5 ms from state 1 to state 0.

Isolation and Operational Durability

To ensure operational safety and noise immunity, the unit provides 1500 V isolation for 1 minute between channels and between output channel groups, alongside a 2300 V isolation rating relative to internal logic. Mechanical durability reaches 20 million cycles, while electrical durability handles up to 100,000 cycles under specified resistive and inductive load conditions such as AC-15 and DC-13.

Physical and Electrical Connection

Housed in a compact enclosure measuring 90 mm in height, 27.3 mm in width, and 84.6 mm in depth, the unit weighs approximately 0.11 kg. It mounts securely onto a 35 mm symmetrical DIN rail and uses a single removable screw terminal block for efficient field wiring maintenance. Current consumption is rated at 30 mA at 5 V DC and 40 mA at 24 V DC.

Technical Specifications

Frequently Asked Questions

Q: What controller platforms are compatible with the TM2DRA8RT module? A: This module is primarily designed for Modicon M238 logic controllers and maintains compatibility with Twido and Advantys OTB system architectures.

Q: How are the 8 relay outputs grouped for common connections? A: The 8 discrete outputs are divided into 2 common points, with a maximum current limit of 7 A per output common group.