Module overview
The Siemens 6ES7131-6BH01-0DA0 is a digital input module for the SIMATIC ET 200SP distributed I/O system. It sits on the ET 200SP bus adapter, draws 90 mA at 24 V DC, and dissipates 1.7 W. Rated supply voltage range is 19.2 V to 28.8 V DC, so standard 24 V control power is fine, but a sagging bus below 19.2 V will drop the module offline.
