The Modicon TM2DDI16DT is a 16-point Digital Input Expansion Module from Schneider Electric’s TM2 series. While it shares many internal specifications with the “DK” version, the “DT” suffix indicates that it uses Removable Screw Terminal Blocks rather than high-density connectors.
This makes it the preferred choice for standard control panels where individual wires are landed directly on the module without the need for specialized cables or sub-bases.
1. Input Configuration
The TM2DDI16DT provides a straightforward interface for 24V DC discrete sensors like pushbuttons, limit switches, and proximity sensors.
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Number of Inputs: 16.
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Input Voltage: 24V DC.
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Input Type: Sink/Source (Logic can be defined by how you wire the “Common” terminal).
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Connection Type: 2x Removable Screw Terminal Blocks.
2. Technical Specifications
| Feature | Details |
| Model Number | TM2DDI16DT |
| Input Current | 4.4 mA per channel |
| Input Impedance | $5.4 k\Omega$ |
| Response Time | 4 ms (standard) |
| Isolation | 500Vrms between inputs and internal logic |
| Current Draw | 25 mA at 5V DC (from the PLC bus) / 40 mA at 24V DC (external) |












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