Siemens 6ES7131-4BF00-0AA0 Programmable Logic Controller Module

Siemens 6ES7131-4BF00-0AA0 is an 8-channel digital input electronics module for the ET 200S distributed I/O system, offered in a compact 15 mm-wide form factor designed for mounting on the ET 200S backplane. It provides eight 24 V DC digital inputs with IEC 61131 type 1 characteristics; logic “0” accepts -30 to +5 V and logic “1” accepts +15 to +30 V, with an input current of about 5 mA per channel and compatibility with 2-wire sensors. The module is powered from the backplane’s 3.3 V DC bus (max 10 mA) and dissipates typ 1.2 W, with built-in reverse polarity protection and an address space of 1 byte per module. It supports isochronous operation (TWE = 3000 µs) and provides no encoder supply or outputs, making it a dedicated digital input option for ET 200S installations requiring reliable 24 V sensing in a compact footprint.