6ES7131-6BF01-0BA0 Siemens SIMATIC ET 200SP DI 8x 24VDC ST Original Best Quality


  • 6ES7131-6BF01-0BA0
  • DI 8x 24VDC ST
  • Digital input module
  • 8 digital inputs
  • 24 V DC
  • Input type 3 (IEC 61131)
  • Sink input (PNP/P-reading)
  • Module diagnostics: Short circuit/Sensor supply/Wire break/Supply voltage
  • Input delay 0.05-20 ms
  • Colour code: CC01
  • Suitable for BU type A0

Availability: 266 in stock

Siemens SIMATIC ET 200SP DI 8x 24VDC ST – 6ES7131-6BF01-0BA0


With the BaseUnits (BUs), the ET 200SP offers a rugged and service-friendly design with permanent wiring:

  • No tools needed for one-handed wiring using push-in terminals
  • Actuation of the spring NC contacts with a standard screwdriver, with a blade width up to 3.5 mm
  • Outstanding access due to arrangement of measuring tap, spring NC contacts and cable entry in columns, while at the same time reducing the space required by 64%
  • Fault-proof color coding of the spring NC contacts for better orientation in the terminal panel
  • Replacement of I/O modules during operation without affecting the wiring
  • Operation with module gaps (gaps without I/O module)
  • Automatic coding of the I/O modules prevents destruction of the electronics if a module is accidentally inserted in the wrong slot during replacement
  • High EMC interference immunity:
    • self-assembling shielded backplane bus
    • multi-layer conductor plate with shield levels for interference-free signal transmission from the terminal to the I/O module
    • system-integrated, space-saving shield connection for quick installation
  • Self-assembling potential groups without external wiring or jumpers
  • Replaceable terminal box
  • Side-by-side latching of the BUs for high mechanical and EMC loads
  • Optional module-specific color identification of the terminals according to the color code CC
  • Optional equipment marking using slide-in equipment labeling plates

An ET 200SP station can be expanded via one ‘BU-Send’ BaseUnit with a “BA-Send” BusAdapter plugged onto it with up to 16 modules from the ET 200AL series of I/O devices with IP67 protection.


The different BaseUnits (BU) facilitate the exact adaptation to the required type of wiring. This enables users to select economical connection systems for the I/O modules used for their task. The TIA Selection Tool assists in the selection of the BaseUnits most suitable for the application.

BaseUnits with the following functions are available:

  • Single-conductor connection, with direct connection of the shared return conductor
  • Direct multi-conductor connection (2, 3 or 4-wire connection)
  • Recording of the terminal temperature for the internal temperature compensation for thermocouple measurements
  • AUX or additional terminals for individual use as voltage distribution terminal

The BaseUnits (BU) can be plugged onto DIN rails compliant with EN 60715 (35 x 7.5 mm or 35 mm x 15 mm). The BUs are arranged next to one another beside the interface module, thereby safeguarding the electromechanical link between the individual system components. An I/O module is plugged onto the BUs, which ultimately determines the function of the respective slot and the potentials of the terminals.

Potential group formation

Scalable I/O systems usually offer the possibility of individual potential group formation. In the case of distributed I/O devices, this previously required an additional power module (infeed module) that provided the separation from the left-hand potential group as well as the infeed, display, monitoring, and diagnostics of the load voltage. It also featured a filter function against external interference and offered protection against polarity reversal.

All of these functions are now integrated into the basic components of the system with ET 200SP. For users, this means the elimination of the power module. This saves an additional slot for each potential group, resulting in greater flexibility in terms of configuration and, ultimately, a saving of storage space.

A light BU separates the self-assembling, internal voltage buses (P1, P2, AUX) and thus opens a new potential group. The supply voltage of a potential group must be fed in at the light BU of this potential group.

A dark BU forwards the supply voltage of the adjacent light BU on the left via the self-assembling voltage buses P1, P2 and AUX. A new infeed is therefore only required on the next light BU to the right. The setting of a further light BU is required whenever

  • a new potential group is to be formed (for example, for isolating the supply voltage from module groups) or
  • the maximum current simultaneously required by the potential group exceeds the permissible limit of 10 A.

Equipment labeling plates

Equipment labeling plates enable the equipment to be easily identified (e.g. compliant with EN 81346). They are easily plugged onto the required component (interface modules, I/O modules and BaseUnits) and when required, they can be easily replaced with the component.

The following labeling components are available:

  • Equipment labeling plates, white, ten sheets each with 16 labels, for thermal transfer card printers or labels
Color identification of the terminals

The potentials at the terminals of the BaseUnit are defined by the I/O module. Optionally, the potentials of the terminals can be identified by module-specific color-coded labels to prevent wiring errors. The color-coded label that matches the respective I/O module is defined by the color code CCxx of the I/O module. This color code is also printed on the front of the module.

In BaseUnits with 10 internally jumpered AUX terminals, these can also be identified with color-coded labels. For the 10 AUX terminals, color-coded labels are available in red, blue, and yellow/green.

System-integrated shield connection

For the space-saving and EMC-optimized connection of cable shields, a shield connection is available that is quick and easy to mount. This consists of one shield connection element that can be plugged onto the BaseUnit and one shield terminal for each module. The low-impedance connection to the functional ground (DIN rail) is achieved without any additional wiring by the user.

The BaseUnits can be equipped with an equipment labeling plate.

SIMATIC ET 200SP, Digital input module, DI 8x 24V DC Standard, type 3 (IEC 61131), sink input, (PNP, P-reading), Packing unit: 1 piece, fits to BU-type A0, Colour Code CC01, input delay time 0,05..20ms, module diagnostics for: short-circuit of sensor supply, wire break, supply voltage


DataSheet in PDF

Weight 0.036 kg
Dimensions 6.50 × 7.70 × 2.30 mm


Product type designation

DI 8×24 VDC ST

HW functional status

From FS02

Firmware version


● FW update possible


usable BaseUnits

BU type A0

Color code for module-specific color identification plate


● I&M data

Yes; I&M0 to I&M3

● Isochronous mode


● STEP 7 TIA Portal configurable/integrated from version


● STEP 7 configurable/integrated from version

V5.5 SP3 or higher

● PCS 7 configurable/integrated from version

V8.1 SP1

● PROFIBUS from GSD version/GSD revision

One GSD file each, Revision 3 and 5 and higher

● PROFINET from GSD version/GSD revision


● DI


● Counter


● Oversampling




Rated value (DC)

24 V

permissible range, lower limit (DC)

19.2 V

permissible range, upper limit (DC)

28.8 V

Reverse polarity protection


Current consumption, max.

50 mA; All channels are supplied from the encoder supply

Number of outputs


Output voltage, min.

19.2 V

Short-circuit protection

Yes; per module

● 24 V


● Short-circuit protection


● Output current, max.

700 mA

● Output current per channel, max.

700 mA

● Output current per module, max.

700 mA

Power loss, typ.

1 W; 24 V, 8 inputs supplied via encoder supply

● Inputs

1 byte; + 1 byte for QI information

Automatic encoding


● Mechanical coding element


● Type of mechanical coding element

Type A

● 1-wire connection

BU type A0

● 2-wire connection

BU type A0

● 3-wire connection

BU type A0 with AUX terminals or potential distributor module

● 4-wire connection

BU type A0 + Potential distributor module

Number of digital inputs


Digital inputs, parameterizable


Source/sink input


Input characteristic curve in accordance with IEC 61131, type 3


● Rated value (DC)

24 V

● for signal "0"

-30 to +5 V

● for signal "1"

+11 to +30V

● for signal "1", typ.

2.5 mA

— at "0" to "1", min.

0.05 ms

— at "0" to "1", max.

20 ms

— at "1" to "0", min.

0.05 ms

— at "1" to "0", max.

20 ms

● shielded, max.

1 000 m

● unshielded, max.

600 m

● 2-wire sensor


— permissible quiescent current (2-wire sensor), max.

1.5 mA

Diagnostics function


● Diagnostic alarm


● Diagnostic information readable


● Monitoring the supply voltage


— parameterizable


● Monitoring of encoder power supply

Yes; Module-by-module, optional protective circuit for preventing wire-break diagnostics in the case of simple encoder contacts: 25 kOhm to 45 kOhm

● Wire-break

Yes; Module-wise

● Short-circuit

Yes; Module-wise

● Monitoring of the supply voltage (PWR-LED)

Yes; green PWR LED

● Channel status display

Yes; green LED

● for channel diagnostics


● for module diagnostics

Yes; green/red DIAG LED

● between the channels


● between the channels and backplane bus


● between the channels and the power supply of the electronics


Isolation tested with

707 V DC (type test)

Suitable for safety functions


● horizontal installation, min.

-30 °C; < 0 °C as of FS02

● horizontal installation, max.

60 °C

● vertical installation, min.

-30 °C; < 0 °C as of FS02

● vertical installation, max.

50 °C

● Installation altitude above sea level, max.

5 000 m; Restrictions for installation altitudes > 2 000 m, see manual


15 mm


73 mm


58 mm

Weight, approx.

28 g

last modified:


Product Condition

Brand New, New – Backlog, New – No Original Box, New – Original Box Opened, Used – Average, Used – Below Average, Used – Excellent, Used – Fairly Good, Used – Good, Used – Poor, Used – Very Good


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