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6ES7326-1BK01-0AB0

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Siemens 6ES7326-1BK01-0AB0 is a SIMATIC S7-300 SM 326 fail-safe digital input module with 24 isolated 24 V DC inputs, configurable sensor evaluation, and diagnostic signaling.
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Technical specifications for 6ES7326-1BK01-0AB0

  • Manufacturer:
    Siemens
  • Part Number:
    6ES7326-1BK01-0AB0
  • Product Family:
    Siemens Simatic S7-300
  • Product Type:
    SIMATIC S7-300 SM 326 24-Channel Fail-Safe Digital Input Module
  • Stock:
    1
  • Digital Inputs:
    24 single-channel or 12 dual-channel
  • Rated Input Voltage:
    24 V DC
  • Channel Isolation:
    Two groups of 12 inputs
  • Sensor Evaluation:
    1oo1 or 1oo2 per channel or channel pair
  • Input Signal 1:
    11 to 30 V
  • Input Signal 0:
    -30 to +5 V
  • Typical Input Current:
    10 mA for signal 1
  • Sensor Supply Outputs:
    4 short-circuit-protected outputs
  • Sensor Supply Grouping:
    Electrically isolated in groups of 2
  • Rated Sensor Supply Current:
    400 mA
  • Configuration in Run:
    Supported in standard mode
  • Isochronous Accuracy:
    30 ms
  • Input Address Area:
    10 bytes
  • Output Address Area:
    4 bytes
  • Maximum Unshielded Cable:
    100 m
  • Maximum Shielded Cable:
    200 m
  • Maximum Safety Level:
    SIL 3 / Category 4
  • Supply Ride-Through:
    5 ms excluding sensor outputs
  • Backplane Current:
    100 mA maximum
  • Load Current without Sensors:
    450 mA maximum
  • Typical Power Loss:
    10 W
  • Input Delay:
    2.1 to 3.4 ms
  • Diagnostics:
    Assignable diagnostic interrupt and readable diagnostic information
  • Status Indication:
    Green LED per channel; red SF and green SAFE LEDs
  • Weight:
    1.058 lbs (0.48 kg)
  • Estimated shipping dimensions:
    15.4x13.1x9.1cm
  • Tariff Code:
    85389091
  • Country of origin:
    Germany
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Inputs Sensor Supply Safety Eval Diagnostics

Features:

  • Twenty-four inputs can be used singly or as twelve evaluated pairs.
  • Four protected sensor supplies feed the channel groups.
  • Channel, SF, and SAFE indicators separate input state from module and safety conditions.
Siemens 6ES7326-1BK01-0AB0 reads safety or standard 24 V DC sensor states for an S7-300 station.

Its channel pairing changes the relationship between field contacts and process-image bits.

Module diagnostics report field-supply, discrepancy, communication, and internal errors through the controller.

The 6ES7326-1BK01-0AB0 article is the 24-input SM 326 revision; later BK02 hardware is a different order number and is not used as the product identity here.
Siemens 6ES7326-1BK01-0AB0 SIMATIC S7-300 SM 326 24-Channel Fail-Safe Digital Input Module Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

Channel and Address Organization

  • Single-channel: All 24 inputs can be evaluated independently.
  • Dual-channel: Paired channels provide twelve 1oo2 process signals.
  • Isolation: The inputs are separated into two isolated groups of twelve.
  • Addressing: The module occupies 10 input bytes and 4 output bytes.

Internal and External Sensor Power

  • Outputs: Four protected supplies feed six-channel groups.
  • Grouping: Sensor-supply outputs are isolated in pairs.
  • External source: All six channels in a group must use the same external supply.
  • Detection limit: External supply wiring removes some internal short-circuit detection coverage.

Sensor Evaluation and Timing

  • 1oo1: A single input produces the process signal for its channel.
  • 1oo2: Two paired inputs are compared before one process signal is released.
  • Discrepancy: The configured time must allow both contacts to change without a false fault.
  • Safety level: The application wiring and sensor quality determine whether SIL 3 / Category 4 is achieved.

Fault Indication and Recovery

  • Channel faults: Sensor-line and discrepancy conditions are assigned to the affected channel.
  • Module faults: Missing auxiliary voltage and communication faults affect the module.
  • Indicators: SF, SAFE, and channel LEDs provide local state information.
  • Corrective path: Controller diagnostics identify whether wiring, parameters, communication, or hardware requires attention.
Description
Siemens 6ES7326-1BK01-0AB0 is an SM 326 fail-safe digital input module for SIMATIC S7-300 and ET 200M stations. It receives 24 V DC sensor states on 24 inputs and transfers the evaluated safety or standard process image through the backplane.

The 24 inputs of 6ES7326-1BK01-0AB0 are electrically isolated in two groups of twelve. STEP 7 can assign 1oo1 evaluation to individual channels or 1oo2 evaluation to paired channels, so the hardware wiring and the configured evaluation must describe the same sensor arrangement.

Four short-circuit-protected sensor supplies on 6ES7326-1BK01-0AB0 feed groups of six channels and are isolated in pairs. When an external supply is used, every six-channel group must share that source, and several internal short-circuit tests no longer cover the external field path.

Channel LEDs on 6ES7326-1BK01-0AB0 show input state, while SF and SAFE indications separate a module fault from safety-mode operation. Diagnostic records distinguish missing load voltage, sensor-supply faults, discrepancy errors, communication faults, and internal module conditions.
Alternative Names
6ES73261BK010AB0 6ES7326 1BK01 0AB0 6ES 7326 1BK01 0AB0 Siemens 6ES7326-1BK01-0AB0 6ES7326-1BK01-0AB0 SM 326 Digital Input 6ES7326-IBK01-0AB0 6ES7326-1BKO1-0AB0 6E57326-1BK01-0AB0
Technical notes
Before commissioning Siemens 6ES7326-1BK01-0AB0, make the PROFIsafe destination address, channel pairing, discrepancy time, and physical sensor wiring agree with the safety project.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Why does 6ES7326-1BK01-0AB0 report a discrepancy error during a valid safety demand?
Compare both 6ES7326-1BK01-0AB0 input contacts and increase only the configured discrepancy time needed by the actual sensor mechanism.
What causes the SF LED on 6ES7326-1BK01-0AB0 when channel LEDs still change?
Read the 6ES7326-1BK01-0AB0 diagnostic record for missing auxiliary voltage, parameter, communication, sensor-supply, or internal faults.
Can externally powered sensors retain every short-circuit test on 6ES7326-1BK01-0AB0?
No. With an external source, 6ES7326-1BK01-0AB0 cannot detect every short circuit listed for the internal sensor-supply arrangement.
Why is one 1oo2 signal from 6ES7326-1BK01-0AB0 missing from the process image?
Check that the correct left and right channels are paired because 6ES7326-1BK01-0AB0 exposes one process bit for each configured 1oo2 pair.
What should be checked after replacing 6ES7326-1BK01-0AB0?
Match the 6ES7326-1BK01-0AB0 PROFIsafe address switch, HW Config parameters, sensor supplies, channel wiring, and safety signature before restart.
Why does 6ES7326-1BK01-0AB0 show no external auxiliary voltage?
Verify both 24 V DC load feeds and terminal wiring because 6ES7326-1BK01-0AB0 raises that diagnostic when L+ is missing.