Schneider Electric Twido/Modicon M238 8-Channel 24VDC Discrete Input Module (DIN Rail)

The Schneider Electric Discrete Input Module is a robust I/O expansion module designed for reliable digital signal acquisition in industrial automation systems. This module (MPN: TM2DDI8DT) is compatible with both Modicon M238 logic controllers and the Twido range, offering seamless integration into existing control architectures.

It provides 8 discrete input channels, specifically engineered for 24 VDC input signals (with an input voltage limit of 20.4 to 28.8 V). The module supports both sink and source (positive or negative logic) wiring configurations, providing flexibility for diverse field device connections. Each input has a typical current of 7 mA and an impedance of 3.4 kOhm, with a fast response time of 4 ms for both state 0 and state 1 changes.

For robust operation, the module features 500 V isolation between its channels and internal logic for one minute, safeguarding the control system from field disturbances. The inputs share a single common point for simplified wiring. It consumes 25 mA at 5 VDC (for all inputs at state 1) and includes a local display block for status indication.

Mounting is convenient and secure on a 35 mm symmetrical DIN rail. This compact module, weighing approximately 0.2 lb (0.1 kg), is equipped with a removable screw terminal block for easy installation and maintenance, making it a reliable and serviceable component for industrial control panels.

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