TM3DI16 | Schneider Modicon TM3 Discrete Input Module Supplier

What Is the TM3DI16?

When your automation system demands reliable 24 VDC discrete input detection, the TM3DI16 delivers 16 inputs conforming to IEC 61131-2 type 3. This module supports both sink and source logic, giving you flexibility in wiring positive or negative signals. Part of the Modicon TM3 family, it integrates seamlessly with Modicon M221, M241, and M251 controllers.

Key Features & Technical Specs

• 16 discrete inputs, each with a 7 mA current draw at 24 VDC.
• Voltage state 1 guaranteed from 15 to 28.8 V; state 0 from 0 to 5 V.
• Current state 1 guaranteed at ≥2.5 mA; state 0 at ≤1 mA.
• Input impedance of 3.4 kOhm ensures consistent signal detection.
• Response time of 4 ms for both turn-on and turn-off.
• Removable screw terminal block with 10 terminals, 3.81 mm pitch, accepting 1.5 mm² wire.
• Consumes 5 mA at 5 VDC via bus connector when off, and 40 mA at 5 VDC when on.

One distinctive spec is the 4 ms response time, which allows the module to capture fast sensor signals without missing events—critical in high-speed packaging or sorting lines.

Real-World Applications

In material handling systems, the TM3DI16 monitors limit switches and proximity sensors to track product flow. For example, a conveyor line using Modicon M241 can rely on these inputs to detect jams or confirm part presence. The module's 50 m unshielded cable length supports distributed sensor placement across a production floor.

Installation Guide

Mount the TM3DI16 on a TH35-15 or TH35-7.5 DIN rail per IEC 60715, or use a panel with a fixing kit. Connect the 24 VDC sensors to the removable screw terminal block, ensuring proper polarity for sink or source wiring. Keep unshielded cable runs under 50 m to maintain signal integrity. The module is non-insulated between inputs but provides 500 VAC isolation between input and internal logic.

Maintenance & Reliability

Routine inspection of terminal connections and environmental conditions helps maintain uptime. The module operates from -10 to 55 °C horizontally or -10 to 35 °C vertically, with IP20 protection when the cover is in place. Its resistance to electrostatic discharge (4 kV contact, 8 kV air) and electromagnetic fields (10 V/m up to 1 GHz) ensures stable performance in industrial environments.

Compatibility & Integration

The TM3DI16 is designed for Modicon M221, M241, and M251 controllers. It communicates via the TM3 bus, drawing power from the 5 VDC and 24 VDC bus connectors. No external communication protocols are required—simply plug it into the expansion rack.

FAQs about TM3DI16

Q: What is the input voltage range for the TM3DI16?

A: The guaranteed voltage for state 1 is 15 to 28.8 VDC, and for state 0 it is 0 to 5 VDC.

Q: Can the TM3DI16 handle both sink and source inputs?

A: Yes, the module supports sink or source (positive/negative) logic.

Q: What is the response time of the TM3DI16?

A: The turn-on and turn-off response times are both 4 ms.

Q: How many inputs does the TM3DI16 have?

A: It has 16 discrete inputs conforming to IEC 61131-2 type 3.

Q: What certifications does the TM3DI16 hold?

A: It carries CE, C-Tick, and CULus markings, and complies with EN/IEC 61131-2 and EN/IEC 61010-2-201.

Product Support & Availability

The TM3DI16 is in stock and ready to ship from Petro Auto Tech. Contact our team for pricing and lead times. Please verify current lifecycle status and availability with Petro Auto Tech before ordering.