Name: Siemens 6ES7131-4CD02-0AB0 Digital Input Electronic Module
Brand: Siemens
SKU: 22719
Availability: InStock
Rating: 5.0 (1 reviews)

Introduction

The Siemens 6ES7131-4CD02-0AB0 Digital Input Electronic Module is part of the SIMATIC ET 200S distributed I/O product family. It is designed for applications requiring four digital input channels capable of receiving specified AC and DC signals in industrial automation systems.

The module supports nominal input voltages from 24 to 48 V AC/DC, making it suitable for installations where field signals are not limited to conventional 24 V DC. Its four input channels transfer discrete signal states to the automation controller through the ET 200S backplane bus.

Diagnostic capabilities include configurable wire-break monitoring, while green channel LEDs and a red group-fault indicator help technicians monitor operating conditions. The module also provides a protected sensor supply output rated up to 500 mA, subject to the specified electrical and installation requirements.

With a compact 15 mm width, the 6ES7131-4CD02-0AB0 fits into compatible ET 200S assemblies. It is particularly relevant to maintenance projects involving existing equipment designed for AC/DC digital input signals. Before ordering or installing a replacement, verify the complete part number, input voltage, frequency requirements, wiring arrangement, and terminal module compatibility.

Technical Specifications

Parameter	Specification
Brand	Siemens
Model	6ES7131-4CD02-0AB0
Product Type	Digital Input Electronic Module
Product Family	SIMATIC ET 200S
Module Designation	4DI UC 24–48V
Number of Digital Inputs	4
Rated Input Voltage	24–48 V AC/DC
DC Signal 0 Input Range	−6 to +6 V DC
AC Signal 0 Input Range	0–5 V AC
DC Signal 1 Input Range	−15 to −57.6 V DC or +15 to +57.6 V DC
AC Signal 1 Input Range	15–48 V AC
Supported AC Frequency	47–63 Hz
Typical Input Current at Signal 1	10 mA
Input Characteristic	IEC 61131 Type 1
Maximum Input Delay	15 ms
Configurable Diagnostics	Yes
Wire-Break Monitoring	Supported
Input Status Indicators	Green LED per channel
Group Fault Indicator	Red SF LED
Sensor Supply Output Current	Up to 500 mA
Sensor Supply Short-Circuit Protection	Yes
Channel-to-Channel Isolation	No
Isolation from Backplane Bus	Yes
Insulation Test Voltage	2,500 V DC
Typical Power Dissipation	0.7 W
Maximum Shielded Cable Length	1,000 m
Maximum Unshielded Cable Length	600 m
Isochronous Operation	Supported
Module Width	15 mm
Dimensions (W × H × D)	15 × 81 × 52 mm
Dimensions (inches)	0.59 × 3.19 × 2.05 in
Weight (provided specification)	0.035 kg
Weight (provided specification, lb)	0.08 lb
Installation	Compatible SIMATIC ET 200S terminal module required
Packaging Information	Catalog designation specifies 5 modules per packaging unit

Note: The dimensions and weight follow the supplied product information. The supplied weight of 0.035 kg is consistent with the approximate 35 g module weight in Siemens technical documentation. Packaging quantity may vary by seller and should be confirmed when ordering.

Recommended Related Models

The following Siemens modules may be relevant to SIMATIC ET 200S installations. Confirm voltage compatibility, channel count, and diagnostic requirements before selecting an alternative.

Model	Product Type	Typical Function
6ES7131-4CD02-0AB0	Digital Input Module	4-channel, 24–48 V AC/DC input
6ES7131-4BD01-0AA0	Digital Input Module	4-channel, 24 V DC standard input
6ES7131-4BD01-0AB0	Digital Input Module	4-channel, 24 V DC high-feature input
6ES7131-4BB01-0AA0	Digital Input Module	2-channel, 24 V DC input
6ES7131-4BB01-0AB0	Digital Input Module	2-channel, 24 V DC high-feature input
6ES7193-4CA50-0AA0	Terminal Module	ET 200S connection and wiring

Popular Related Models

These additional Siemens automation components may be relevant to industrial I/O systems, sensor integration, and control system maintenance.

Model	Product Category	Application
6ES7131-4CD02-0AB0	Digital Input Module	AC/DC 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 that the Siemens 6ES7131-4CD02-0AB0 matches the application's AC/DC input voltage, frequency, wiring, and diagnostic requirements. For replacement projects, verify the terminal module and existing ET 200S configuration before ordering.

Applications

The Siemens 6ES7131-4CD02-0AB0 is a SIMATIC ET 200S digital input electronic module designed to acquire AC and DC signals from industrial field devices. Designated as a 4DI UC 24–48V module, it provides four digital input channels for applications that require monitoring signals with a wider voltage range than conventional 24 V DC input modules.

Typical applications include:

Industrial machine control: Monitoring compatible switches, sensors, and equipment status signals.
AC/DC signal acquisition: Collecting digital signals from field devices operating within the module's supported voltage ranges.
Production line monitoring: Detecting machine states, position signals, and discrete process conditions.
PLC-based automation: Transferring binary input states to a compatible controller through the ET 200S backplane bus.
Distributed I/O systems: Expanding input capacity in existing SIMATIC ET 200S installations.
Legacy system maintenance: Replacing a matching module where the existing application requires 24–48 V AC/DC input capability.

Unlike standard 24 V DC-only modules, this variant supports selected AC and DC input signals. Correct voltage selection and wiring are essential to reliable operation.

Advantages

Four digital input channels: Monitors four independent binary signals in one compact module.
Wide AC/DC input capability: Supports specified input signals from 24 to 48 V AC/DC.
Automatic AC/DC polarity handling: Provides automatic AC or DC recognition and reverse-polarity protection.
Configurable diagnostics: Supports parameterizable diagnostic functions, including wire-break monitoring.
Individual channel indicators: Green LEDs show digital input states.
Group fault indication: A red SF LED indicates a reported group fault.
Sensor supply capability: Provides a sensor supply output rated up to 500 mA, subject to module and wiring requirements.
Short-circuit protection: Includes protection for the sensor supply output.
Electrical isolation: Isolates the digital input circuits from the backplane bus.
Synchronized operation: Supports isochronous operation in compatible system configurations.

Technical FAQs

Q1: What is the Siemens 6ES7131-4CD02-0AB0?

It is a SIMATIC ET 200S digital input electronic module with four AC/DC input channels designed for specified 24–48 V signals.

Q2: How many digital input channels does it provide?

The module provides four digital inputs for acquiring binary signals from compatible industrial field devices.

Q3: What input voltage range does the module support?

The module supports 24–48 V AC/DC nominal operating ranges. For DC, the specified logic-1 ranges include positive and negative polarity signals; AC input support is specified for 47–63 Hz.

Q4: Can the module detect both AC and DC signals?

Yes. It supports specified AC and DC digital input signals, with automatic AC/DC recognition. Signal voltage and frequency must remain within the technical specifications.

Q5: Does it support wire-break diagnostics?

Yes. Wire-break monitoring is supported through parameterizable diagnostic functions. The appropriate sensor arrangement and monitoring resistance must meet the module requirements.

Q6: Does the module have individual input status indicators?

Yes. Each digital input has a green LED, and a red SF LED indicates group faults.

Q7: Does it provide a sensor supply output?

Yes. The module provides a sensor supply output with a rated current of 500 mA. The supply is protected against short circuits, and the permitted load must be observed.

Q8: Are the four input channels electrically isolated from one another?

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

Q9: What is the maximum supported cable length?

The maximum specified cable length is 600 m for unshielded cables and 1,000 m for shielded cables. Actual installation conditions and applicable wiring requirements must also be considered.

Q10: Can this module replace a standard 24 V DC input module?

Not automatically. The 6ES7131-4CD02-0AB0 supports a different input voltage range and AC/DC signal behavior. Confirm the field voltage, sensor wiring, terminal module, and controller configuration before selecting it as a replacement.

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