Product Description – Schneider TM2DMM8DRT Mixed I/O Module

The Schneider TM2DMM8DRT is a versatile mixed I/O expansion module designed to extend Modicon PLC systems, including M200, M218, M221, M241, and M251 series. It provides 4 digital inputs, 4 relay outputs, and 4 configurable analog inputs plus 2 analog outputs, all in a compact DIN-rail mounted form factor. Moreover, its removable terminal blocks simplify wiring, while LED indicators offer quick diagnostics for both digital and analog channels.

This module supports both sink and source digital inputs with fast response times under 1 millisecond, and relay outputs capable of switching up to 2 A. Analog channels are fully configurable for voltage or current (0–10 V, 0–20 mA, or 4–20 mA), making it ideal for processing both discrete and continuous signals. Therefore, it is well-suited for machine automation, HVAC systems, pumping stations, and packaging lines requiring a compact yet flexible I/O solution.

Technical Specifications

Electrical & I/O

• Supply Voltage: 24 V DC

• Digital Inputs: 4 × 24 V DC, sink/source logic, IEC 61131‑2 compliant

• Input Current: ~7 mA per channel at 24 V DC

• Input Impedance: ~3 kΩ

• Digital Outputs: 4 × relay outputs (SPST/SPDT)

• Relay Rating: 2 A at 24 V DC / 250 V AC

• Analog Inputs: 4 × configurable (0–10 V, 0–20 mA, 4–20 mA)

• Analog Outputs: 2 × configurable (0–10 V, 0–20 mA, 4–20 mA)

• Resolution: 10–12 bits depending on PLC configuration

Performance

• Digital Input Response Time: ≤ 1 ms

• Relay Output Response Time: ≤ 10 ms typical

• Isolation: 500 V between input/output groups and logic

• Diagnostics: LED indicators for each channel

Mechanical

• Mounting: DIN-rail

• Dimensions (W × H × D): 90 × 90 × 70 mm

• Weight: 0.3 kg

• Connection: Removable terminal blocks

• Protection: IP20

Communication & Integration

• Interface: TM2 expansion bus (plug-in)

• Compatible Controllers: Modicon M200, M218, M221, M241, M251

• Configuration: Managed via EcoStruxure Machine Expert – Basic software

Environmental & Compliance

• Operating Temperature: 0 °C to +55 °C

• Storage Temperature: −20 °C to +70 °C

• Relative Humidity: 5–95% non-condensing

• Certifications: CE, UL, CSA

• Sustainability: RoHS and REACh compliant

FAQ

Q1: How many digital and relay channels does the TM2DMM8DRT provide?
It offers 4 digital inputs and 4 relay outputs for Modicon PLC expansion.

Q2: Are analog channels included?
Yes, it includes 4 analog inputs and 2 analog outputs configurable for voltage or current.

Q3: What is the input response time?
Digital inputs respond within 1 millisecond for real-time monitoring.

Q4: How is this module mounted?
The module mounts easily on a 35 mm DIN rail with removable terminal blocks.

Q5: Which PLC series are compatible?
Compatible with Modicon M200, M218, M221, M241, and M251 PLCs.