Manufacturer & Model: Schneider Electric Modicon M171 series programmable controller, part number TM171PDM27R
Power Supply: 24 V AC/DC (also supports 48 V DC); designed for HVAC and pumping automation applications
Integrated Display & Inputs/Outputs:
- Built-in 128×64 pixel LCD and user keypad
- Total I/O: 27 – including 9 digital inputs, 7 digital outputs (relay), 6 analog inputs, 5 analog outputs, and 1 high-speed counter
Digital Inputs/Outputs:
- 9 discrete inputs supporting sink/source logic (24 V),
- 7 relay outputs: 2 × 8 A SPDT, 2 × 5 A SPST, plus analog/output relays
Analog Channels:
- 6 analog inputs (voltage, current, NTC, Pt1000)
- 5 analog outputs (programmable 0–10 V or 4–20 mA)
- 2 high-speed open-collector outputs (1 kHz, 12 V, 35 mA)
Communications:
- RS‑485 Modbus serial link
- CAN bus (CANopen) expansion support
- USB ports: one mini-B (device), one Type-A (host)
Performance: Deterministic scan cycle (~0.3 ms per 1 K binary instruction); built-in real-time clock; IP20; operating −10 °C to +55 °C
Certifications & Standards: CE, cURus, CSA, EAC; compliant with EN/IEC 60730 standards

Schneider Electric – TM171PDM27R – Modicon M171 Performance Logic Controller