Siemens 6ES7131-4BB01-0AA0 Input Module

2-Channel Standard Digital Input Module for Distributed I/O Systems

The 6ES7131-4BB01-0AA0 functions as a standard digital input electronic module for the SIMATIC ET 200S distributed I/O system . This module provides two 24 V DC input channels, making it suitable for connecting standard sensors and switches in your automation network . The 15 mm width allows for high-density installation in space-constrained control cabinets . Furthermore, this module ships as a packing unit of five pieces, supporting efficient inventory management for system integrators .

Technical Specifications

The table below details the key technical parameters for the 6ES7131-4BB01-0AA0 electronic module .

Parameter	Specification
Manufacturer	Siemens
Product Type	Digital Input Electronic Module
Series	SIMATIC ET 200S
Number of Inputs	2 (24 V DC)
Input Type	IEC 61131, Type 1
Input Voltage (Signal “1”)	+15 to +30 V DC
Input Voltage (Signal “0”)	-30 to +5 V DC
Input Current (Typ.)	7 mA at 24 V
Input Delay (0→1 / 1→0)	2 to 4.5 ms (typ. 3 ms)
Address Space	1 byte (standard) / 2 bits (packed)
Encoder Supply Output	Min. L+ (-0.5 V), up to 500 mA
Power Loss (Typ.)	0.4 W
Cable Length (Shielded)	Max. 1,000 m
Cable Length (Unshielded)	Max. 600 m
Dimensions (W x H x D)	15 mm x 81 mm x 52 mm
Weight (Approx.)	35 g
Protection Rating	IP20
Product Lifecycle	Phase-out started
Country of Origin	China

System Integration and Application

The 6ES7131-4BB01-0AA0 plugs directly onto ET 200S terminal modules, enabling hot-swapping during operation . Each input channel features a green status LED for quick visual diagnostics of the signal state . Moreover, the module includes reverse polarity protection, safeguarding the unit from incorrect wiring . For reliable signal acquisition, the module supports both shielded cables up to 1,000 meters and unshielded cables up to 600 meters . Please note that this module is identified as a spare part and has entered its phase-out lifecycle, so we recommend planning for long-term system maintenance .