Siemens 6ES7131-4BF00-0AA0 SIMATIC ET 200S 8DI DC24V Input Module

Overview

SIEMENS SIMATIC ET 200S

6ES7131-4BF00-0AA0 SIMATIC ET 200S 8DI DC24V Input Module

An eight-channel 24 V DC input module in a 15 mm width, with a one-byte input address area and channel-status LEDs.

At a Glance

Brand	Siemens
Model	6ES7131-4BF00-0AA0
Product Type	Digital input module
Core Function	Eight-channel sensor-state acquisition
Application	ET 200S distributed I/O assemblies

Eight channels in 15 mm

The compact electronic unit acquires eight field-input states.

Fixed input filtering

Both signal edges use a typical 3 ms input delay.

External sensor distribution

The selected terminal base and supplementary terminals provide the necessary sensor-supply connections.

Product Overview

6ES7131-4BF00-0AA0 packs eight 24 V DC digital inputs into a single 15 mm ET 200S electronic module.

The input channels share a common potential and are isolated from the backplane bus, with green channel LEDs showing the acquired states and no module diagnostic function.

Ordering focus: Match the eight-channel module and terminal-base pattern, then provide enough separate potential terminals for the selected two-wire sensor arrangement.

Key Functions

Acquire eight discrete signals

The module reads switches or compatible two-wire proximity sensors through eight input channels.

Filter both input transitions

The fixed input delay is typically 3 ms for rising and falling transitions.

Map a compact process image

One byte holds the eight input states, and the module uses three parameter bytes.

Official Specifications

Input count	8 channels
Nominal supply and input voltage	24 V DC
ON-state input range	15–30 V
OFF-state input range	−30 to +5 V
Typical input current at 24 V	5 mA per ON input
Input delay for both transitions	Typically 3 ms; 2.0–4.5 ms range
Input characteristic	IEC 61131 type 1
Two-wire sensor quiescent-current limit	1.5 mA
Maximum cable length	600 m unshielded; 1,000 m shielded
Process-image input area	1 byte
Parameter length	3 bytes
Typical power dissipation	1.2 W
Channel isolation	No channel-to-channel isolation; isolated from the backplane bus
Permissible inter-circuit potential difference	75 V DC or 60 V AC
Isolation test voltage	500 V DC
Status indicators	One green LED per input
Module diagnostics	No diagnostic function
Isochronous operation	Supported
Module width and weight	15 mm; approximately 35 g

Official source:Siemens exact eight-input module manual · Siemens exact eight-input data sheet

Frequently Asked Questions

Does 6ES7131-4BF00-0AA0 provide a diagnostic alarm for a failed sensor wire?

No, this electronic module has no diagnostic function.

How much input address space does 6ES7131-4BF00-0AA0 occupy?

The eight channels occupy one byte of input address space.

Can I adjust 6ES7131-4BF00-0AA0 to a 0.1 ms input delay?

No, its input delay is fixed at typically 3 ms for both transitions.

Will an input at 12 V reliably count as ON on 6ES7131-4BF00-0AA0?

No, the specified ON-state range starts at 15 V.

How are channels 0 and 7 connected through the base for 6ES7131-4BF00-0AA0?

Channel 0 uses terminal 1 and channel 7 uses terminal 8 in the specified eight-input terminal assignment.

Do I need extra potential terminals for two-wire sensors connected through TM-E15S26-A1 with 6ES7131-4BF00-0AA0?

Yes, the illustrated two-wire arrangement uses additional terminals to provide enough 24 V sensor-supply connection points.

Are independent galvanically isolated sensor potentials available on each channel of 6ES7131-4BF00-0AA0?

No, the input channels are not isolated from one another.

Compatibility & Ordering Notes

Before ordering 6ES7131-4BF00-0AA0: Choose a supported eight-input terminal base, preserve the channel-to-terminal mapping and provide the sensor-supply distribution required by the field wiring.

Compatibility Checklist for 6ES7131-4BF00-0AA0

• Use the 15–30 V ON-state threshold.
• Observe the 1.5 mA sensor quiescent-current limit.
• Provide additional potential terminals where needed.
• Do not expect module diagnostic alarms.

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