Product Introduction
The Schneider TM2DDI16DK is a compact discrete input module designed for the Modicon M238 series of logic controllers. It provides 16 digital inputs operating at 24 V DC, making it ideal for collecting signals from sensors, push buttons, and limit switches in industrial automation. The module supports both sink and source wiring configurations and offers electrical isolation between channels and internal logic up to 500 V for one minute, ensuring robust performance in noisy environments.
Technical Specifications Breakdown
Key specifications of the Schneider TM2DDI16DK include:
| Parameter |
Value |
| Discrete Input Number |
16 |
| Input Voltage Type |
DC |
| Input Voltage Limits |
20.4...28.8 V |
| Discrete Input Current |
5 mA |
| Input Impedance |
4.4 kOhm |
| Response Time |
4 ms (both 0→1 and 1→0) |
| Isolation (Channel to Logic) |
500 V for 1 minute |
| Current Consumption (5 V DC) |
35 mA at state 1 |
| Weight |
0.1 kg |
| Dimensions (WxHxD) |
21.4 x 90 x 81.3 mm |
These specs ensure reliable signal acquisition with fast response and good noise immunity. The 4.4 kOhm impedance limits current draw while maintaining accurate detection.
Industry Applications
Commonly used in packaging, material handling, and assembly lines, the Schneider TM2DDI16DK interfaces with proximity sensors and pushbuttons to monitor machine status. Its 4 ms response time suits high-speed counting applications where timely input detection is critical. The isolation capability prevents ground loops and protects the controller in electrically harsh environments, reducing unexpected downtime.
Installation & Setup Guidance
Mount the TM2DDI16DK on a 35 mm symmetrical DIN rail. Connect inputs via the HE10 connector using appropriate wiring—match the sink/source configuration to your field devices. Power the module from the backplane; ensure the 24 V DC supply is within 20.4–28.8 V. Local signalling LEDs on the front panel help verify each channel's state during commissioning. No calibration is required—simply verify wiring and test with a known signal.
Maintenance & Reliability
Routine inspection should focus on connector tightness and signs of corrosion. The solid-state design means no moving parts; environmental factors like temperature and vibration are the main concerns. Keep dust away from the HE10 connector. With proper installation, the TM2DDI16DK delivers long service life, reducing total cost of ownership through minimized replacement needs.
Selection Guide & Purchasing Advice
When ordering, confirm compatibility with your controller—the TM2DDI16DK works with Modicon M238 and Twido families, plus Advantys OTB islands. Consider the number of inputs and voltage type; the 24 V DC version suits most industrial sensors. For large systems, plan common point count (1 common in this module). For reliable sourcing, choose UBEST Automation (ubest101) to ensure genuine Schneider parts and fast delivery.