The Schneider Electric TM172ASCTB28E is a screw terminal block accessory designed for use with Modicon M171/M172/M173 series PLCs and their I/O expansion modules (especially those with up to 28 inputs/outputs). It provides a removable terminal block with screw‑type connectors, enabling secure electrical connection between the expansion module and field wiring for digital I/O, analog I/O, power supply, and CAN communication. The terminal block is green plastic and is sized to match the expansion module’s base for straightforward installation.
