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6ES7321-7BH01-0AB0

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SIMATIC SM 321 digital input module with 16 isolated 24 V DC inputs.
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Technical specifications for 6ES7321-7BH01-0AB0

  • Manufacturer:
    Siemens
  • Part Number:
    6ES7321-7BH01-0AB0
  • Product Family:
    Siemens Simatic S7-300
  • Product Type:
    Digital Input Module
  • Stock:
    1
  • Digital Inputs:
    16
  • Rated Input Voltage:
    24 V DC
  • Signal 1 Range:
    15–30 V DC
  • Signal 0 Range:
    -3–5 V DC
  • Input Current:
    7 mA typical
  • Electrical Isolation:
    Yes
  • Front Connector:
    20-pole
  • Module Width:
    40 mm
  • Weight:
    0.547 lbs (0.248 kg)
  • Estimated shipping dimensions:
    12.80 × 15.20 × 5.20 cm
  • Tariff Code:
    85389099
  • 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 Specifications Input Channels Electrical Data Installation Checks

Features:

  • Sixteen 24 V DC digital input channels
  • Galvanically isolated field inputs
  • Designed for a 20-pole S7-300 front connector
The Siemens 6ES7321-7BH01-0AB0 is a SIMATIC S7-300 SM 321 digital input module. It receives sixteen 24 V DC field signals and transfers their states to the S7-300 system.

The input circuitry is isolated from the backplane bus. The module uses the documented 20-pole front connector and must be configured for the installed S7-300 station.

Before ordering Siemens 6ES7321-7BH01-0AB0, confirm the complete order code, documented configuration, and connection requirements for the installed system.

Siemens 6ES7321-7BH01-0AB0 Manuals, Datasheets, Drivers, Link Important Notice: Manuals, accessories, cables, calibration data, and software are not included unless specifically listed in the quotation or product description. Please confirm documentation and accessory requirements before ordering.
Siemens 6ES7321-7BH01-0AB0 Digital Input Module Specs

General

  • Manufacturer Siemens
  • Model 6ES7321-7BH01-0AB0
  • Condition New Original ready stock
  • Product Family SIMATIC S7-300, SM 321
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.
  • Sixteen digital input channels
  • Rated input voltage is 24 V DC
  • Typical input current is 7 mA
  • Signal 1 range is 15 to 30 V DC
  • Signal 0 range is -3 to 5 V DC
  • Field inputs are isolated from the backplane bus
  • Match the field wiring to the documented terminal assignment
  • Verify the 20-pole front connector before replacement
  • De-energize the station before installing or removing the module
Description
The Siemens 6ES7321-7BH01-0AB0 is a SIMATIC SM 321 digital input module with 16 isolated 24 V DC inputs. It acquires sixteen 24 V DC digital input signals for the S7-300 backplane.

The module provides galvanic isolation between the field inputs and the backplane bus and uses a 20-pole front connector.

Selection should be based on the complete order code, documented electrical characteristics, connector requirements, and the installed system configuration.
Alternative Names
Siemens 6ES7321-7BH01-0AB0 6ES7321-7BH01-0AB0 6ES7321 7BH01 0AB0 6ES73217BH010AB0 6ES7 321-7BH01-0AB0 SM 321 16DI 24 V DC Siemens SIMATIC S7-300 6ES7321-7BH01-0AB0
Technical notes
Siemens 6ES7321-7BH01-0AB0 is a SM 321 digital input module with 16 isolated 24 V DC inputs for Siemens SIMATIC S7-300 systems.
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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.
What is Siemens 6ES7321-7BH01-0AB0?
It is a SM 321 digital input module with 16 isolated 24 V DC inputs for the documented Siemens SIMATIC S7-300 system configuration.
Which system is Siemens 6ES7321-7BH01-0AB0 compatible with?
It is intended for Siemens SIMATIC S7-300 installations; verify the complete order code and documented system requirements.
What specifications should be checked for Siemens 6ES7321-7BH01-0AB0?
Check the channel or interface configuration, supply and signal ratings, connector requirements, and installed module configuration.
What should be verified before replacing Siemens 6ES7321-7BH01-0AB0?
Confirm the complete order code, wiring, front connector, hardware configuration, and controller compatibility before replacement.
What is the lifecycle status of Siemens 6ES7321-7BH01-0AB0?
Siemens classifies the S7-300 / ET 200M portfolio as product cancellation from October 2025; availability is confirmed during quotation.
Is the Siemens 6ES7321-7BH01-0AB0 manual available with a quotation?
Apter Power can provide relevant official technical documentation with the quotation when available.
How can I request price and availability for Siemens 6ES7321-7BH01-0AB0?
Send the complete model, required quantity, destination, and any configuration requirements to Apter Power for confirmation.

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