Siemens 6ES7131-4BB00-0AA0 SIMATIC ET 200S 2DI DC24V ST Digital Input Module

Overview

SIEMENS SIMATIC ET 200S

6ES7131-4BB00-0AA0 SIMATIC ET 200S 2DI DC24V ST Digital Input Module

A two-channel standard 24 V DC input module for switches and proximity sensors, with individual channel status indication.

At a Glance

Brand	Siemens
Model	6ES7131-4BB00-0AA0
Product Type	Digital input module
Core Function	Discrete field-signal acquisition
Application	ET 200S sensor input stations

Two field-input channels

Read switches or compatible proximity sensors through the ET 200S station.

Defined input thresholds

The signal-1 range is 15–30 V and the signal-0 range is −30 to +5 V.

Sensor supply provision

The module provides the documented supply connections for the selected sensor-wiring arrangement.

Product Overview

6ES7131-4BB00-0AA0 acquires two 24 V DC discrete input signals from switches or proximity sensors in an ET 200S station.

The standard input electronics combine per-channel green status indicators with a typical 3 ms input delay and a terminal-base-dependent two-, three- or four-wire sensor arrangement.

Ordering focus: Match the standard 2DI module, sensor quiescent current and exact terminal-base connection pattern without transferring High Feature diagnostic expectations to this version.

Key Functions

Acquire contact and sensor states

Two standard input channels accept rated 24 V DC signals with defined ON and OFF voltage ranges.

Supply compatible field sensors

The sensor-supply output provides up to 500 mA with a loaded output voltage of at least L+ minus 0.5 V.

Show individual input state

A green LED on each channel provides local status indication, while this standard version has no diagnostic function.

Official Specifications

Input channel count	2
Rated input supply	24 V DC from power module
Signal-1 input voltage	15–30 V
Signal-0 input voltage	−30 to +5 V
Typical signal-1 input current	7 mA at 24 V
Input transition delay	Typically 3 ms; 2.0–4.5 ms for both transitions
Input characteristic	IEC 61131 Type 1
Maximum two-wire proximity-sensor quiescent current	1.5 mA
Maximum unshielded and shielded cable lengths	600 m and 1000 m respectively
Loaded sensor-supply output voltage	At least L+ minus 0.5 V
Sensor-supply output current	0–500 mA; rated 500 mA
Typical module power dissipation	0.4 W
Isolation arrangement	No channel-to-channel isolation; channels isolated from backplane bus
Permissible inter-circuit potential difference	75 V DC or 60 V AC
Insulation test voltage	500 V DC
Status indication	One green LED per input channel
Dimensions (W × H × D)	15 × 81 × 52 mm
Approximate module weight	35 g

Official source:Siemens ET 200S system manual

Frequently Asked Questions

Will a 12 V field signal reliably switch on an input of 6ES7131-4BB00-0AA0?

No, the specified signal-1 range starts at 15 V.

Can I connect a two-wire proximity switch to 6ES7131-4BB00-0AA0?

Yes, a two-wire proximity switch can be connected when its quiescent current does not exceed 1.5 mA.

Is 6ES7131-4BB00-0AA0 suitable for detecting very short high-speed pulses?

Its input delay is typically 3 ms and may range from 2.0 to 4.5 ms, so the pulse timing must accommodate that filtering.

Are the two input channels of 6ES7131-4BB00-0AA0 isolated from each other?

No, the channels are not mutually isolated, although they are isolated from the backplane bus.

How much sensor-supply current is available through 6ES7131-4BB00-0AA0?

The sensor-supply output is rated for 500 mA with a permissible range from 0 to 500 mA.

Will 6ES7131-4BB00-0AA0 provide the diagnostic functions of a High Feature input module?

No, this standard input module has no diagnostic function and uses green channel LEDs for local status.

Which terminals receive the two input signals on 6ES7131-4BB00-0AA0?

The input signals for channels 0 and 1 connect at terminals 1 and 5 respectively, with the remaining wiring determined by the selected terminal base.

Compatibility & Ordering Notes

Before ordering 6ES7131-4BB00-0AA0: Select the standard two-channel module with a matching TM-E base, size the sensor supply and verify input voltage, pulse duration and two-wire sensor quiescent current.

Compatibility Checklist for 6ES7131-4BB00-0AA0

• Use the 15–30 V ON threshold and −30 to +5 V OFF range.
• Keep two-wire sensor quiescent current at or below 1.5 mA.
• Allow for the specified input delay.
• Follow the actual terminal-module pattern for sensor supply and AUX1.

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