Name: Siemens 6ES7131-4BD01-0AA0 Digital Input Electronic Module
Brand: Siemens
SKU: 22709
Availability: InStock
Rating: 5.0 (1 reviews)

Introduction

The Siemens 6ES7131-4BD01-0AA0 Digital Input Electronic Module is designed for digital signal acquisition in the SIMATIC ET 200S distributed I/O system. It enables a PLC to monitor discrete field signals and use them in automated machine sequences, production processes, and equipment control applications.

The module provides four 24 V DC digital inputs in a compact 15 mm-wide design. Its IEC 61131 Type 1 input characteristics support common industrial switching devices, while individual green status LEDs simplify visual inspection of the input states.

Electrical isolation between the input circuitry and the backplane bus supports integration into a modular distributed I/O architecture. The module also supports suitable two-wire sensors, subject to the specified electrical limits. Because this is a standard input variant, it does not provide dedicated diagnostic functions or a group-fault indicator.

For maintenance, expansion, or spare-part procurement, the 6ES7131-4BD01-0AA0 should be matched against the existing ET 200S configuration. Confirm the complete order number, terminal module, wiring arrangement, and input requirements before installation.

Technical Specifications

Parameter	Specification
Brand	Siemens
Model	6ES7131-4BD01-0AA0
Product Type	Digital Input Electronic Module
Product Family	SIMATIC ET 200S
Module Designation	4DI Standard 24 V DC
Number of Digital Inputs	4
Rated Input Voltage	24 V DC
Permissible Supply Voltage	20.4–28.8 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
Input Delay Range	2–4.5 ms
Configurable Input Delay	No
Two-Wire Sensor Support	Yes
Maximum Sensor Quiescent Current	1.5 mA
Diagnostic Function	No
Input Status Indicators	Green LED per channel
Group Fault Indicator	Not provided
Channel-to-Channel Isolation	No
Isolation from Backplane Bus	Yes
Typical Power Dissipation	0.7 W
Maximum Shielded Cable Length	1,000 m
Maximum Unshielded Cable Length	600 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)	0.174 kg
Weight (provided specification, lb)	0.38 lb
Installation	Compatible SIMATIC ET 200S terminal module required
Product Status	Spare-part product; discontinued according to Siemens product lifecycle information

Note: The dimensions and weight follow the supplied product information. Siemens technical data lists the electronic module itself at approximately 35 g, while the 0.174 kg figure is associated with the supplied product's catalog information. Confirm the required shipping or packaging weight separately when necessary.

Recommended Related Models

The following models are relevant to SIMATIC ET 200S distributed I/O applications. Their channel counts and functions differ, so confirm the required configuration before ordering.

Model	Product Type	Typical Function
6ES7131-4BD01-0AA0	Digital Input Module	4-channel, 24 V DC standard input
6ES7131-4BB01-0AA0	Digital Input Module	2-channel, 24 V DC digital input
6ES7131-4BB01-0AB0	Digital Input Module	2-channel, 24 V DC high-feature input
6ES7131-4BF00-0AA0	Digital Input Module	8-channel digital input
6ES7132-4BB01-0AB0	Digital Output Module	Digital output control
6ES7193-4CA50-0AA0	Terminal Module	ET 200S module connection and wiring

Popular Related Models

These Siemens automation components may also be relevant to industrial control system maintenance and distributed I/O projects.

Model	Product Category	Application
6ES7131-4BD01-0AA0	Digital Input Module	Four-channel discrete 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 management
6ES7193-4CB20-0AA0	Terminal Module	Distributed I/O connection and wiring

Ordering recommendation: Confirm the complete Siemens part number, product condition, terminal module type, and system compatibility before purchasing the 6ES7131-4BD01-0AA0. For replacement projects, also verify that the application's requirements are compatible with a standard digital input module without dedicated diagnostic functions.

Applications

The Siemens 6ES7131-4BD01-0AA0 is a SIMATIC ET 200S digital input electronic module designed to acquire binary signals from industrial field devices and transfer their status to a PLC through a distributed I/O system. This module features four standard 24 V DC digital inputs and is suitable for a wide range of machine automation and industrial control applications.

Typical applications include:

Machine automation: Monitoring push buttons, limit switches, and proximity sensors.
Production line control: Detecting workpiece positions, machine states, and equipment operating conditions.
Industrial process monitoring: Collecting discrete signals for PLC-based logic and sequence control.
Equipment status monitoring: Tracking the on/off states of sensors and switches.
Distributed I/O expansion: Adding four digital input channels to compatible SIMATIC ET 200S installations.
Maintenance and spare-part replacement: Replacing a matching module in an existing automation system after verifying wiring and hardware compatibility.

The 6ES7131-4BD01-0AA0 is a standard digital input module rather than a high-feature diagnostic variant. It is intended for applications where reliable 24 V DC signal acquisition and straightforward input status monitoring are the primary requirements.

Advantages

Four digital input channels: Collects four independent binary signals in a compact module.
24 V DC input voltage: Supports common industrial sensors and switching devices.
Compact 15 mm width: Helps reduce space requirements in distributed I/O assemblies.
Individual status LEDs: Green indicators show the state of each digital input channel.
IEC 61131 Type 1 input characteristics: Supports standard industrial digital input signal requirements.
Electrical isolation: Provides isolation between the digital input circuitry and the backplane bus.
Two-wire sensor support: Compatible with suitable two-wire sensors within the specified electrical limits.
Reverse polarity protection: Helps protect the module against incorrect supply polarity.
Modular installation: Integrates into a compatible SIMATIC ET 200S station using the appropriate terminal module.

Technical FAQs

Q1: What is the Siemens 6ES7131-4BD01-0AA0?

It is a SIMATIC ET 200S digital input electronic module with four standard 24 V DC digital inputs.

Q2: How many digital input channels does the module provide?

The module provides four digital input channels for collecting binary signals from compatible field devices.

Q3: What is the rated input voltage?

The rated 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: What is the typical input current?

The typical input current at logic 1 is approximately 7 mA per channel at 24 V DC.

Q5: Does the module support configurable input delay?

No. The standard input delay is not parameterizable. The typical delay is 3 ms, with a specified range of 2 to 4.5 ms for both signal transitions.

Q6: Can the module connect to two-wire sensors?

Yes. Suitable two-wire sensors can be connected when their electrical characteristics meet the module requirements. The maximum permissible quiescent current is 1.5 mA.

Q7: Does the module support diagnostic functions?

No. This standard module does not provide a dedicated diagnostic function or a red group-fault SF LED.

Q8: How can technicians check the input states?

Each digital input channel has a green status LED, allowing technicians to visually check input states during commissioning and maintenance.

Q9: Are the digital input channels electrically isolated from one another?

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

Q10: What should be checked before ordering a replacement?

Verify the full catalog number, terminal module compatibility, field wiring, 24 V DC signal requirements, and existing ET 200S configuration. Also confirm that a standard module without dedicated diagnostics meets the application's requirements.

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