Module overview and fit
The Siemens 6ES7131-4BF00-4AA0 is a SIMATIC DP ET200S electronic module providing 8 digital inputs rated for 24 V DC. Each input draws a typical 5 mA at signal "1". The module is 15 mm wide, 81 mm tall, and 52 mm deep — a slim footprint that fits tightly on a DIN rail in a dense I/O cabinet.
Panel fit and wiring note
At 15 mm wide, the module occupies one slot on the ET200S terminal block. The 52 mm depth clears most standard 80 mm deep enclosures with room for wiring ducts. Spring-cage terminals accept 0.2–2.5 mm² conductors; strip length 8 mm.