32 Sink Outputs for M238 — Key Constraints at a Glance
The TM2DDO32UK is a 32-point sink transistor output module for the Modicon M238 logic controller. Outputs are rated 0.1 A per channel, 24 V DC sink logic, with a total of 1 A per common point across two commons. Response time is 300 µs in both directions — suitable for discrete valve and indicator control, but not for high-speed counting or precise timing. The module draws 20 mA at 5 V DC from the backplane and 70 mA at 24 V DC when all outputs are on. The module provides no overload or short-circuit protection on the outputs; each channel is a simple transistor switch with a residual voltage of 1 V at state 1. External series fuse or current-limiting resistor is required for any load that could draw more than 0.12 A.
Mounting, Wiring & Panel Fit
Occupies 33.5 mm (1.3 in) of panel width, 90 mm height, 81.3 mm depth. That gives room for a compact layout but the depth may conflict with shallow enclosures or door-mounted HMI. Wiring is via a HE10 ribbon connector (not a screw-clamp terminal block); a mating connector and pre-assembled cable or breakout board must be sourced separately. Isolation between channels and internal logic is 500 V for 1 minute.