The Siemens 6ES7131-4BB01-0AB0 is a SIMATIC ET 200S High Feature electronic module with two 24 V DC digital inputs. It is designed for switches and two-wire proximity sensors and provides configurable 0.1, 0.5, 3, or 15 ms input delays. Channel status is indicated by green LEDs, while a red SF LED reports group faults. The module supplies up to 500 mA for sensors, provides electronic short-circuit protection, supports hardware interrupts and isochronous operation, and dissipates typically 0.4 W. The 6ES7131-4BB01-0AB0 supports precise, diagnosable distributed I/O in machine and process automation.

Collects two discrete 24 V DC signals in ET 200S stations installed near machinery and production cells.

Connects compatible two-wire BEROs for presence, position, and end-of-travel detection.

Uses configurable input delays and hardware interrupts for responsive machine states and process events.

Monitors guards, limit switches, sensors, and station status in distributed automation equipment.

Reports channel status, short-circuit conditions, and group faults for faster maintenance response.

Supports exact-model replacement and refurbishment of installed High Feature digital-input stations.