Siemens 6ES7131-4BD00-0AA0 is a SIMATIC DP electronic module for ET 200S, packing four 24V DC digital inputs into a 15 mm wide slice. The module arrives as a 5-pack — a convenient batch for populating multiple stations or stocking as a critical spare. Rated input current 7 mA at 24 V per channel, with a supply capacity of 500 mA from the backplane. Power dissipation is a modest 0.7 W. Signal thresholds: '0' at -30 to +5 V, '1' at +15 to +30 V. Input delay runs 2–4.5 ms, typically 3 ms. Not parameterizable, no diagnostics — a straightforward, fixed-function block.
Spares & stocking
The 5-pack is a min/max item for any ET 200S rack with 24V DI needs. A failed input module on a 15 mm slice takes minutes to swap — keep a pack on the shelf to avoid downtime.
Integration details
15 mm wide, 52 mm deep, 81 mm high; shielded cable max 1 000 m, unshielded 600 m, reverse polarity protected.