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Siemens 6ES7131-6BH01-0BA0 digital input module

6ES7131-6BH01-0BA0 is a Siemens 16-channel 24 V DC digital input module for documented switch and 2-wire-sensor input paths in a Siemens I/O station.

System function

Rebuilt from individual evidence

Evidence and limits

6ES7131-6BH01-0BA0 is a SIMATIC digital input module for a Siemens I/O station, with 16 digital 24 V DC inputs.

The documented system path accepts switch or 2-wire-sensor states and presents channel states to the Siemens I/O station controller.

The manual documents configurable input delay and module diagnostics; installation-specific compatibility remains unknown.

Exact reference
6ES7131-6BH01-0BA0
Category
PLC / CPU
Evidence checked
2026-09-11

System role

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

Function
Receives discrete 24 V DC field signals on 16 inputs for a Siemens I/O automation station.
System position
Sits between field switches or 2-wire sensors and the Siemens I/O station controller's input data.
Upstream / inputs
Switches and 2-wire sensors provide the upstream field states documented for this module.
Downstream / outputs
The module makes the channel states available to the Siemens I/O station controller in central or distributed operation.
Limitations
Unknown: the exact controller project, firmware, network configuration, installation-specific compatibility, replacement suitability, current commercial status, and local service coverage.

Evidence ledger

Facts, inferences, and unknowns are kept separate.

Facts

  • Siemens identifies 6ES7131-6BH01-0BA0 as a SIMATIC ET 200SP digital input module, DI 16x 24 V DC Standard, type 3 under IEC 61131, with sink input (PNP, P-reading).

    Confidence: high

  • The Siemens manual specifies 16 digital inputs for the module.

    Confidence: high

  • The Siemens manual specifies suitability for switches and 2-wire sensors in accordance with IEC 61131 type 3.

    Confidence: high

  • The Siemens manual specifies a configurable input delay of 0.05 to 20 ms per channel.

    Confidence: high

  • The Siemens manual documents configurable module diagnostics for supply-voltage loss and wire break.

    Confidence: high

  • The Siemens manual documents central operation with an ET 200SP CPU and distributed operation on PROFINET IO in an ET 200SP system.

    Confidence: high

  • The Siemens catalog and manual identify BaseUnit type A0 as the usable BaseUnit for this item.

    Confidence: high

Inferences

  • Inferred system position: the module sits between discrete field devices and the ET 200SP station controller's input data.

    Confidence: high

    Rationale: The sources identify a discrete-input module, name its field-device inputs, and document its central or distributed ET 200SP operation; the intervening chain position is therefore an explicit inference rather than a claimed wiring instruction.

  • Inferred signal path: switch or sensor states enter the 24 V DC digital channels and are made available as input states to the ET 200SP controller.

    Confidence: high

    Rationale: The module identity, channel count, documented field-device types, and documented ET 200SP operating modes support this system-level description.

Unknowns

  • Unknown: the exact controller project, firmware, network configuration, and installation-specific compatibility.

    Confidence: low

    Missing evidence: No installation-specific controller, firmware, network, or project configuration was captured in the individual research.

  • Unknown: replacement suitability for a neighboring module or any BaseUnit variant other than the documented type A0.

    Confidence: low

    Missing evidence: No current replacement or neighboring-module compatibility evidence was captured.

  • Unknown: current stock, price, lead time, repair status, warranty, or local service coverage.

    Confidence: low

    Missing evidence: No current stock, price, lead-time, repair, warranty, or local-service evidence was captured.

System position diagram

A left-to-right signal path shows switches or 2-wire sensors feeding the 6ES7131-6BH01-0BA0 digital input module, which sends channel input states to a Siemens I/O station controller.

Reading limit: system position only, not a wiring or safety drawing.

System role inferred from Siemens documentation: field switches or 2-wire sensors feed the module, which presents input states to the Siemens I/O station controller.

Enlarged system diagram

A left-to-right signal path shows switches or 2-wire sensors feeding the 6ES7131-6BH01-0BA0 digital input module, which sends channel input states to a Siemens I/O station controller.

System role inferred from Siemens documentation: field switches or 2-wire sensors feed the module, which presents input states to the Siemens I/O station controller.

View Mermaid source
flowchart LR
  field["Switches or 2-wire sensors"] -->|24 V DC discrete states| module["6ES7131-6BH01-0BA0"]
  module -->|channel input states| controller["Siemens I/O station controller"]
View diagram labels
Nodes
Switches or 2-wire sensors; 6ES7131-6BH01-0BA0 digital input module; Siemens I/O station controller
Edges
24 V DC discrete states; channel input states

Next action

The captured Siemens evidence supports a concrete Siemens I/O-station digital-input role for 6ES7131-6BH01-0BA0, while installation-specific compatibility remains an explicit unknown.

Verify the complete article number and BaseUnit type A0 against the installed Siemens I/O station before replacement.

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