Siemens 6ES7141-1BF31-0XA0 SIMATIC DP EM 141 distributed I/O station 8DI 24 V DC expansion module

6ES7141-1BF31-0XA0 is a SIMATIC DP EM 141 distributed I/O station 8DI 24 V DC expansion module; its documented system role is to receive eight 24 V DC field input signals and adds them to a distributed I/O station basic module.

System function

Rebuilt from individual evidence

System position

Evidence and limits

6ES7141-1BF31-0XA0 is a SIMATIC DP EM 141 distributed I/O station 8DI 24 V DC expansion module.

In the documented system path, its role is to receive eight 24 V DC field input signals and adds them to a distributed I/O station basic module.

The source evidence supports the product identity and system role; installation-specific limits remain explicit unknowns.

Exact reference: 6ES7141-1BF31-0XA0
Category: PLC / CPU
Evidence checked: 2026-09-12

System role

This section explains what the product does and where it acts in the surrounding system.

Function: Receives eight 24 V DC field input signals and adds them to a distributed I/O station basic module.
System position: Sits as a distributed I/O station expansion module between machine sensors and the compatible basic module.
Upstream / inputs: Machine sensors provide eight configured 24 V DC input signals through M12 connections.
Downstream / outputs: The compatible distributed I/O station basic module receives the added input states.
Limitations: Unknown: Installation-specific compatibility, firmware, replacement suitability, and current commercial availability for 6ES7141-1BF31-0XA0 were not established by this individual research.

Evidence ledger

Facts, inferences, and unknowns are kept separate.

Facts

The source identifies 6ES7141-1BF31-0XA0 as a SIMATIC DP EM 141 ET 200X 8DI 24 V DC expansion module.
Confidence: medium
- support.industry.siemens.com — retrieved 2026-09-12; medium confidence
Receives eight 24 V DC field input signals and adds them to an ET 200X basic module.
Confidence: medium
- support.industry.siemens.com — retrieved 2026-09-12; medium confidence

Inferences

Inferred system position: Sits as an ET 200X expansion module between machine sensors and the compatible basic module.
Confidence: medium
Rationale: The exact product description and documented function place this module in the stated signal path.
- support.industry.siemens.com — retrieved 2026-09-12; medium confidence

Unknowns

Unknown: Installation-specific compatibility, firmware, replacement suitability, and current commercial availability for 6ES7141-1BF31-0XA0 were not established by this individual research.
Confidence: low
Missing evidence: No installation-specific controller, firmware, replacement, or current commercial evidence was captured.

System position diagram

A left-to-right system path shows Machine sensors connected through 6ES7141-1BF31-0XA0 to distributed I/O station basic module. — System role inferred from the exact-reference evidence: 6ES7141-1BF31-0XA0 sits in the documented path between Machine sensors and distributed I/O station basic module.

View Mermaid source

flowchart LR upstream["Machine sensors"] -->|configured signals| product["6ES7141-1BF31-0XA0"] product -->|documented function| downstream["distributed I/O station basic module"]

View diagram labels

Nodes: Machine sensors; 6ES7141-1BF31-0XA0 SIMATIC DP EM 141 distributed I/O station 8DI 24 V DC expansion module; distributed I/O station basic module
Edges: configured signals; documented function

Next action

The captured evidence supports a concrete system role for 6ES7141-1BF31-0XA0; installation-specific limits remain explicit unknowns.

Verify the complete 6ES7141-1BF31-0XA0 identity, installed interfaces, and project configuration before replacement or commissioning.

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