Siemens 6ES7131-4RD02-0AB0 Digital Input Electronic Module
Siemens 6ES7131-4RD02-0AB0 Digital Input Electronic Module
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Brand:Siemens Item No.:6ES7131-4RD02-0AB0 Product Origin:Germany Product Dimensions:15 × 81 × 52 mm Product Weight:0.045 kg Payment:T/T, Western Union, Credit Card Goods_stock:15 Shipping Port:Xiamen, China Lead Time:1-3 Days Condition:Brand New And Original Warranty:1 Year Certificate:COO
The Siemens 6ES7131-4RD02-0AB0 is a four-channel digital input module in the SIMATIC ET 200S family. It is designed for acquiring signals from compatible 24 V DC NAMUR sensors and switching contacts in distributed industrial automation systems.
Compared with standard digital input modules, the 4RD02-0AB0 offers features intended for NAMUR applications, including diagnostic capabilities, individual channel status indication, a group fault LED, and an electronically protected sensor supply output. These functions can help operators and maintenance engineers identify input-related issues during commissioning and troubleshooting.
The module is suitable for applications where several sensor signals need to be monitored within a compact distributed I/O station. Its input channels are isolated from the backplane bus and load voltage, but not from each other. System designers should account for this electrical arrangement when planning field wiring.
Before installation, verify the supported sensor type, input configuration, terminal-module arrangement, and diagnostic settings. Siemens lists this product as cancelled, so it is particularly relevant to maintenance and spare-part requirements for existing ET 200S installations.
Technical Specifications
Parameter
Specification
Brand
Siemens
Model
6ES7131-4RD02-0AB0
Product Type
Digital Input Electronic Module
Product Family
SIMATIC ET 200S
Number of Digital Inputs
4
NAMUR Inputs
4
Rated Input Voltage
24 V DC system
Compatible Devices
NAMUR sensors and compatible switching contacts
Input Current for NAMUR Sensors, Signal “0”
0.35–1.2 mA
Input Current for NAMUR Sensors, Signal “1”
2.1–7 mA
Input Current for Unswitched Contact, Signal “1”
Typically 8 mA
Diagnostic Functions
Yes
Wire-Break Detection
Supported
Diagnostic Alarm
Configurable
Hardware Interrupt
No
Channel Status Indicator
Green LED per channel
Group Fault Indicator
Red SF LED
Sensor Supply Voltage Under Load
Minimum 8.2 V
Sensor Supply Rated Current
45 mA
Sensor Supply Short-Circuit Protection
Electronic
Maximum Shielded Cable Length
200 m
Channel-to-Channel Isolation
No
Isolation from Backplane Bus
Yes
Isolation from Load Voltage
Yes
Typical Power Dissipation
1.6 W
Width
15 mm / 0.59 in
Height
81 mm / 3.19 in
Depth
52 mm / 2.05 in
Listed Net Weight
0.045 kg / 0.10 lb
Product Status
Cancelled; listed as a spare part
Note: The manufacturer's technical documentation lists the electronic module's approximate weight as 35 g, while the catalog net weight provided is 45 g. Confirm the applicable product and packaging details when arranging shipment.
Recommended Related Models
The following Siemens modules may be relevant when maintaining or expanding an ET 200S installation. They have different input or output characteristics and should not be considered direct replacements without verification.
Model
Product Type
Key Feature
6ES7131-4BB01-0AA0
Digital Input Module
2-channel, 24 V DC standard input
6ES7131-4BB01-0AB0
Digital Input Module
2-channel, 24 V DC high-feature 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
6ES7131-4EB00-0AB0
Digital Input Module
2-channel, 120 V AC input
When selecting an alternative, confirm whether the application requires NAMUR input characteristics, sensor supply, diagnostic functions, or specific input-current thresholds.
Popular Related Models
Model
Product Description
6ES7132-4BB01-0AB0
SIMATIC ET 200S Digital Output Electronic Module
6ES7134-4GB01-0AB0
SIMATIC ET 200S Analog Input Electronic Module
6ES7135-4GB01-0AB0
SIMATIC ET 200S Analog Output Electronic Module
6ES7193-4CA50-0AA0
SIMATIC ET 200S Terminal Module
6ES7151-1AA05-0AB0
SIMATIC ET 200S Interface Module
For a complete ET 200S configuration, verify the interface module, terminal module, sensor wiring, supply arrangement, and engineering parameters. Selecting components based solely on the product family or physical dimensions does not guarantee compatibility.
Applications
The Siemens 6ES7131-4RD02-0AB0 Digital Input Electronic Module is a four-channel digital input module designed for the SIMATIC ET 200S distributed I/O system. It supports 24 V DC NAMUR sensor signals and compatible switching contacts, making it suitable for industrial applications that require reliable detection of field-device states.
The module is particularly useful in control systems that use NAMUR proximity sensors and other compatible low-current switching devices. Its diagnostic capabilities help maintenance personnel identify certain wiring faults and invalid input signals.
Typical applications include:
Industrial machine monitoring: Detecting switching states from compatible sensors and contacts.
Process automation: Collecting digital signals from NAMUR field devices.
Equipment status monitoring: Monitoring operating states and switching conditions.
Distributed PLC systems: Transferring field input signals through a SIMATIC ET 200S station.
Fault detection: Supporting configured diagnostics for wire breaks and short circuits.
Industrial control panels: Integrating multiple low-current sensor signals into a compact I/O assembly.
This model is a legacy ET 200S component listed as a cancelled product and spare part. Check availability and confirm system compatibility before ordering.
Advantages
Four digital input channels: Monitors up to four compatible digital signals in a single module.
NAMUR sensor support: Designed for 24 V DC NAMUR input applications and compatible switching contacts.
Diagnostic capabilities: Supports diagnostic reporting and configurable fault detection.
Channel status LEDs: Green LEDs indicate the state of individual digital inputs.
Group fault indication: A red SF LED provides visual indication of a group fault.
Sensor supply output: Provides a sensor supply output with a minimum loaded voltage of 8.2 V and a rated current of 45 mA.
Electronic short-circuit protection: The sensor supply output includes electronic short-circuit protection.
Electrical isolation: The input channels are isolated from the backplane bus and load voltage, although the input channels are not isolated from each other.
Compact form factor: Its 15 mm width helps save space in ET 200S assemblies.
The module's diagnostic functions and sensor supply make it useful for applications where signal validity and wiring condition are important. Correct sensor selection and parameter configuration remain essential for reliable operation.
Technical FAQs
Q1: What is the Siemens 6ES7131-4RD02-0AB0?
It is a SIMATIC ET 200S digital input electronic module with four 24 V DC NAMUR input channels.
Q2: How many digital inputs does the module provide?
It provides four digital inputs, supporting up to four compatible sensors or switching contacts.
Q3: What type of sensors can be connected?
It is designed for NAMUR sensors and compatible switching contacts. Confirm the sensor's electrical characteristics and wiring requirements before connection.
Q4: Does the module support diagnostic functions?
Yes. It supports diagnostic alarms and readable diagnostic information, including wire-break detection. Diagnostic functions must be configured as required.
Q5: Does it have input status indicators?
Yes. Each channel has a green status LED, and a red SF LED indicates a group fault.
Q6: What sensor supply does the module provide?
The sensor supply output provides a minimum of 8.2 V under load and has a rated output current of 45 mA. The permitted load and sensor requirements must be checked before use.
Q7: Is the sensor supply short-circuit protected?
Yes. The sensor supply output has electronic short-circuit protection.
Q8: Are the four input channels electrically isolated from each other?
No. The input channels are not isolated from one another. They are isolated from the backplane bus and load voltage.
Q9: What is the maximum supported cable length?
The specified maximum cable length for shielded cable is 200 m. Actual installation requirements should be checked against the sensor and system documentation.
Q10: Is this module suitable for replacing another ET 200S digital input module?
Not automatically. Its NAMUR input characteristics, sensor supply, diagnostics, wiring, and parameter settings differ from those of standard 24 V DC input modules. Confirm the replacement's electrical and configuration compatibility before installation.
