Name: Siemens 6ES7131-4BB01-0AA0 Digital Input Electronic Module
Brand: Siemens
SKU: 22701
Availability: InStock
Rating: 5.0 (1 reviews)

Introduction

The Siemens 6ES7131-4BB01-0AA0 Digital Input Electronic Module is part of the SIMATIC ET 200S distributed I/O product family. It is designed to acquire standard binary signals from industrial field devices and make these signals available to the automation controller through the system backplane bus.

With two 24 V DC digital inputs, the module supports common machine automation tasks such as switch monitoring, position detection, and equipment status collection. Its compact design helps integrate input functionality into modular distributed I/O assemblies where installation space is limited.

The module includes individual green input status indicators, Type 1 input characteristics, and electrical isolation between the input circuitry and the backplane bus. It is installed as part of an ET 200S assembly using a compatible terminal module, so the terminal configuration must be verified when planning a replacement.

The 6ES7131-4BB01-0AA0 is identified as a spare-part product. When sourcing this module for maintenance or system restoration, confirm the exact catalog number and compare the installed hardware configuration before ordering.

Technical Specifications

Parameter	Specification
Brand	Siemens
Model	6ES7131-4BB01-0AA0
Product Type	Digital Input Electronic Module
Product Family	SIMATIC ET 200S
Module Designation	2DI 24 V DC Standard
Number of Digital Inputs	2
Rated Input Voltage	24 V DC
Logic 0 Input Voltage	−30 to +5 V
Logic 1 Input Voltage	+15 to +30 V
Typical Input Current at Logic 1	7 mA at 24 V
Input Characteristic	IEC 61131 Type 1
Typical Input Delay	3 ms
Maximum Input Delay	4.5 ms
Channel Status Indicators	Green LED per channel
Dedicated Diagnostic Function	No
Channel-to-Channel Isolation	No
Isolation from Backplane Bus	Yes
Typical Power Dissipation	0.4 W
Maximum Unshielded Cable Length	600 m
Maximum Shielded Cable Length	1,000 m
Module Width	15 mm
Dimensions (W × H × D)	15 × 81 × 52 mm
Dimensions (inches)	0.59 × 3.19 × 2.05 in
Weight (provided specification)	0.171 kg
Weight (provided specification, lb)	0.38 lb
Compatible System	SIMATIC ET 200S
Installation	Compatible ET 200S terminal module required

Note: The dimensions and weight above follow the supplied product information. Published Siemens technical documentation lists an approximate module weight of 35 g, so the supplied 0.171 kg figure should be confirmed if precise shipping or installed-component weight is important.

Recommended Related Models

The following models belong to the broader Siemens SIMATIC ET 200S distributed I/O range. They provide different input, output, or interface functions; verify each model's specifications and system compatibility before selection.

Model	Product Type	Typical Function
6ES7131-4BB01-0AA0	Digital Input Module	2-channel, 24 V DC digital input
6ES7131-4BD01-0AA0	Digital Input Module	4-channel, 24 V DC digital input
6ES7131-4BF00-0AA0	Digital Input Module	8-channel, 24 V DC digital input
6ES7132-4BB01-0AB0	Digital Output Module	2-channel digital output
6ES7134-4JB01-0AB0	Analog Input Module	Analog signal acquisition
6ES7193-4CA50-0AA0	Terminal Module	ET 200S connection and wiring

Popular Related Models

These Siemens automation products may also be relevant when maintaining or expanding industrial control systems.

Model	Product Category	Application
6ES7131-4BB00-0AB0	Digital Input Module	Discrete input signal acquisition
6ES7132-4BB01-0AB0	Digital Output Module	Digital actuator control
6ES7134-4JB01-0AB0	Analog Input Module	Analog sensor signal acquisition
6ES7135-4GB01-0AB0	Analog Output Module	Analog control signal output
6ES7138-4CA01-0AA0	Power Module	ET 200S station power distribution
6ES7193-4CB20-0AA0	Terminal Module	Distributed I/O module connection

Ordering recommendation: When purchasing the Siemens 6ES7131-4BB01-0AA0, confirm the complete catalog number, module condition, terminal module requirements, and compatibility with the existing SIMATIC ET 200S configuration.

Applications

The Siemens 6ES7131-4BB01-0AA0 is a digital input electronic module designed for the SIMATIC ET 200S distributed I/O system. It provides two standard 24 V DC digital input channels for collecting binary signals from field devices and transferring input states to a higher-level controller through the ET 200S backplane bus.

Typical applications include:

Industrial automation: Collecting digital signals from switches, push buttons, and proximity sensors.
Machine control: Monitoring operating conditions, interlocks, and machine status signals.
Production lines: Detecting the presence or position of workpieces and equipment.
Process monitoring: Transmitting discrete field signals to a PLC for logic processing.
Distributed I/O installations: Expanding input capacity in modular control cabinets and machine control systems.
Equipment maintenance: Replacing an existing module with the same catalog number to restore input functionality.

The module is suitable for standard 24 V DC signal acquisition. Before installation or replacement, verify the terminal module, wiring arrangement, and electrical requirements of the existing ET 200S station.

Advantages

Two digital input channels: Monitors two independent binary input signals in a compact module.
24 V DC operation: Designed for common industrial DC control signals.
Compact 15 mm width: Helps conserve space in distributed I/O assemblies.
Channel status indication: Green LEDs provide visual indication of the digital input states.
Electrical isolation: The digital input channels are isolated from the backplane bus.
Reverse polarity protection: Helps protect the module against incorrect supply polarity within its specified electrical design.
Standardized input characteristics: Uses IEC 61131 Type 1 input characteristics for supported field devices.
Modular integration: Works within the SIMATIC ET 200S system when installed with an appropriate terminal module.

Technical FAQs

Q1: What is the Siemens 6ES7131-4BB01-0AA0?

It is a SIMATIC ET 200S digital input electronic module, commonly designated as a 2DI 24 V DC Standard module.

Q2: How many digital inputs does this module provide?

The module provides two digital input channels for monitoring binary signals from compatible field devices.

Q3: What is the rated input voltage?

The rated digital input voltage is 24 V DC. The specified signal ranges are −30 to +5 V for logic 0 and +15 to +30 V for logic 1.

Q4: Which field devices can be connected?

Compatible devices include industrial switches, push buttons, and suitable proximity sensors. Two-wire sensors are supported when their electrical characteristics meet the module requirements.

Q5: Does the module support input status indication?

Yes. A green status LED is provided for each digital input channel, helping technicians identify input states during commissioning and troubleshooting.

Q6: Does the module provide channel-to-channel electrical isolation?

No. The two input channels are not electrically isolated from each other. The digital inputs are isolated from the backplane bus.

Q7: What is the typical input delay?

The typical input delay is approximately 3 ms for both transitions from logic 0 to logic 1 and from logic 1 to logic 0. The specified range is 2 to 4.5 ms.

Q8: Does the module provide built-in diagnostic functions?

The module does not provide a dedicated diagnostic function. Its per-channel green status LEDs provide basic visual input-state indication.

Q9: Which terminal module is required?

The electronic module must be installed with a compatible SIMATIC ET 200S terminal module. Select the terminal module according to the required wiring and connection arrangement.

Q10: What should be checked before replacing this module?

Confirm the complete part number, the two-channel 24 V DC input specification, terminal module compatibility, wiring assignments, and the configuration of the existing ET 200S station.

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