Digital I/O Modules

Digital I/O Modules for industrial automation systems

Browse Siemens digital input, digital output, and mixed-channel PLC modules by exact manufacturer part number and condition. High-intent replacement searches often include Siemens 6ES7 numbers, so start with the Siemens 6ES7 PLC module replacement guide when matching a module label.

How to identify the correct replacement

  • Match every letter, number, dash, and suffix in the manufacturer part number.
  • Confirm signal voltage, sourcing or sinking logic, channel count, isolation, terminal configuration, and PLC family.
  • Compare the product label and installed hardware with the listing details before ordering.
  • Review the selected condition: New or Used in Great Condition.

Regional buying notes

For North America, Europe, and Australia, confirm local electrical, import, panel approval, and commissioning requirements before replacing automation hardware.

Related categories

Continue with PLC Communication Modules, Distributed I/O, DCS I/O Modules, and PLC Part Number & Compatibility Guides.