Siemens 6ES7131-4BD01-0AA0 ET 200S Digital Input Module

Siemens 6ES7131-4BD01-0AA0: SIMATIC ET 200S 4 DI 24V DC Electronic Module

The Siemens 6ES7131-4BD01-0AA0 (MLFB: 6ES7131-4BD01-0AA0) is a compact 4-channel digital input electronic module designed for the SIMATIC ET 200S distributed I/O system. Engineered for field signal acquisition, this module reads standard 24 V DC switches, proximity sensors, pushbuttons, and auxiliary contact inputs across industrial control networks.

Featuring a slim 15 mm module width, reverse polarity protection, and clear LED status diagnostics, the 6ES7131-4BD01-0AA0 ensures reliable field signal transmission to central PLCs via PROFIBUS or PROFINET head stations.

Key Technical Specifications

• Part Number: 6ES7131-4BD01-0AA0 (MLFB: 6ES7 131-4BD01-0AA0)

• Product Line: SIMATIC ET 200S Distributed I/O System

• Module Type: Digital Input Electronic Module (4 DI Standard)

• Number of Inputs: 4 digital inputs

• Input Voltage: 24 V DC (13 to 30 V DC range)

• Input Characteristic Curve: According to IEC 61131, Type 1

• Input Delay: Typ. 3 ms

• Module Width: 15 mm standard ET 200S form factor

• Compatible Terminal Modules: Plugs into TM-E15S24-01, TM-E15C24-01, and standard 15 mm base units

• Sensor Connection: 2-wire, 3-wire, or 4-wire proximity switches / PNP sensors

• Weight: Approx. 35 g

Key Features and Industrial Benefits

Fast & Reliable Signal Acquisition

Reads 4 independent 24 V DC digital signals with a 3 ms hardware filter delay, ensuring precise input detection and eliminating mechanical contact bounce in fast-moving automation processes.

Compact 15 mm Modular Density

Plugs directly into standard 15 mm ET 200S base terminal blocks, maximizing panel space while enabling custom channel configurations tailored to machine requirements.

Integrated Reverse Polarity Protection

Includes built-in protection against accidental polarity reversal on incoming sensor lines, safeguarding sensitive internal electronics and reducing commissioning mistakes.

Diagnostic Visual LED Indication

Equipped with individual green status LEDs for each of the 4 input channels, allowing maintenance personnel to visually verify sensor switching states directly on the control cabinet door.

Applications

• Interfacing with PNP proximity sensors, photoelectric sensors, and limit switches

• Acquiring status signals from pushbuttons, selector switches, and auxiliary relay contacts

• Distributed signal acquisition in S7-300, S7-400, S7-1200, and S7-1500 PLC environments

• OEM packaging machinery, conveyor systems, and industrial assembly automation