SIMATIC S7-300 SM321 16-channel 24 VDC diagnostic input / 6ES7321-7BH01-0AB0

6ES7321-7BH01-0AB0: S7-300 signal module reviewed in its own section of the May 2022 manufacturer equipment manual. Verify load limits, hardware revision, compatibility and installation before ordering. The historical source does not establish current stock, lifecycle or Iran demand.

Manufacturer part number: 6ES7321-7BH01-0AB0
Brand: Siemens
Category: PLC and HMI
Catalog status: Request a quotation

Technical specifications

Controller family: SIMATIC S7-300
Digital inputs: 16 x 24 VDC
Isolation groups: 1 group of 16 inputs
Input characteristics: IEC61131 Type2
Module features: Programmable diagnostics, diagnostic and hardware interrupts, programmable input delays; parameter reassignment in RUN
Isochronous mode: Yes
Sensor supply: 2 short-circuit-proof sensor supplies, each for 8 channels; external redundant sensor supply supported
Reviewed document edition: 05/2022 / A5E00105505-AK
Document pages: PDF 73, 74
Current lifecycle status: Not established by historical manual; confirm current lifecycle and supply separately
Module notes: Exact standard ordering code only; SIPLUS variants are separate products. Verify hardware revision, host compatibility, load and installation limits before ordering.

Manufacturer manual · S7-300 Module data / 05/2022 / A5E00105505-AK · en · PDF · 05/2022 / A5E00105505-AKManufacturer source: Siemens · Model explicitly covered in family document · Covered models: 6ES7321-7BH01-0AB0 · Checked: 2026-10-22Official manufacturer source

This sheet provides a quick technical summary. For design, installation and final selection, review the latest official manufacturer documentation and verify the complete part number.