Siemens 6ES7131-6BF00-0BA0 SIMATIC ET 200SP DI 8x24VDC ST Input Module

Overview

SIEMENS SIMATIC ET 200SP

6ES7131-6BF00-0BA0 SIMATIC ET 200SP DI 8x24VDC ST Input Module

An eight-channel PNP input module with configurable input delay, module diagnostics and optional quality information for switches and two-wire sensors.

At a Glance

Brand	Siemens
Model	6ES7131-6BF00-0BA0
Product Type	Standard digital input module
Core Function	Reads discrete field signals
Application	ET 200SP stations with A0 BaseUnits

Module-level diagnostics

Selectable diagnostics cover supply voltage, wire break and short circuit.

Input filtering

The input delay can be selected from 0.05 to 20 ms.

Optional value status

Quality information adds one byte to the input address area.

Product Overview

6ES7131-6BF00-0BA0 captures eight 24 V DC field signals through a sink-input circuit for PNP sensors and switches.

The Standard module combines selectable diagnostics with configurable filtering and optional value-status data, using A0 BaseUnits and CC01 terminal identification.

Ordering focus: Keep the Standard variant distinct from Basic and High Feature modules, and include the optional quality byte only when the project uses value status.

Key Functions

Filter the field-input transitions

Selectable input delays from 0.05 to 20 ms allow the application to balance response time and filtering.

Report faults for the input module

Diagnostics can report missing supply voltage, wire break and short circuit, with the DIAG indicator showing the module condition.

Provide a separate data-quality byte

With value status enabled, an additional input byte indicates validity, and a channel fault makes the value status zero for all channels on this module.

Official Specifications

Input Channel Count and Circuit	8 sink inputs for PNP signals
Supply Voltage Range	24 V DC nominal; 19.2–28.8 V DC
Maximum Module Current Consumption	50 mA
Sensor-Supply Output	24 V DC, up to 700 mA, with short-circuit protection
Input Signal Thresholds	Signal 0: −30 to +5 V; signal 1: +11 to +30 V
Typical Signal-1 Input Current	2.5 mA
Selectable Input Delays	0.05, 0.1, 0.4, 0.8, 1.6, 3.2, 12.8 or 20 ms, plus 30–500 µs depending on cable length
Two-Wire Sensor Quiescent Current	1.5 mA maximum
Input Characteristic	IEC 61131 types 1 and 3
Input Address Allocation	1 byte of inputs, plus 1 byte when quality information is enabled
Maximum Signal-Cable Length	1,000 m shielded; 600 m unshielded
Typical Power Loss	1 W
Potential Difference Between Circuits	75 V DC or 60 V AC with basic insulation
Insulation Type-Test Voltage	707 V DC
Horizontal Operating Temperature	0 to +60 °C
Vertical Operating Temperature	0 to +50 °C
Module Width and Weight	15 mm; approximately 28 g

Official source:Siemens DI 8x24VDC ST Manual

Frequently Asked Questions

How much input address space should I reserve for 6ES7131-6BF00-0BA0 with quality information?

Reserve one byte for the inputs and one additional byte for quality information.

Why can all quality bits become zero after one channel fault on 6ES7131-6BF00-0BA0?

A fault on a channel sets the value status to zero for all channels of this module.

Can I shorten the input filter on 6ES7131-6BF00-0BA0 for a faster switch response?

The configurable delay can be reduced to 0.05 ms, with an additional cable-dependent delay of 30–500 µs.

Which two-wire sensors can I connect to 6ES7131-6BF00-0BA0?

Use sensors whose quiescent current does not exceed 1.5 mA and whose signals meet the input characteristics.

How do the PWR and DIAG indicators help troubleshoot 6ES7131-6BF00-0BA0?

PWR indicates the presence of load supply, while DIAG identifies the module parameterization and diagnostic condition.

Can I change parameters on 6ES7131-6BF00-0BA0 while the CPU stays in RUN?

Parameters can be transferred with WRREC using data record 128, while the STEP 7 parameters become active again after a restart.

Can the sensor supply on 6ES7131-6BF00-0BA0 feed every external load in the cabinet?

The integrated sensor supply is limited to 700 mA and must be sized for the connected sensors.

Compatibility & Ordering Notes

Before ordering 6ES7131-6BF00-0BA0: Choose the eight-channel Standard module with its A0 BaseUnit, CC01 identification and the project settings for diagnostics, input delay and value status.

Compatibility Checklist for 6ES7131-6BF00-0BA0

• Use a BU type A0 BaseUnit and CC01 terminal identification.
• Use a light-colored BaseUnit for the first potential group in the station.
• Reserve the extra input byte only when value status is enabled.
• Size the two-wire sensor quiescent current and 700 mA sensor supply correctly.
• Assign supply, wire-break and short-circuit diagnostics to suit the application.
• Retain the exact BF00 hardware article when maintaining the existing project.

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