The Siemens 6ES7322-8BH00-0AB0 is a SM 322 digital output module for the SIMATIC S7-300 and PCS7 platforms, providing 16 digital outputs at DC 24 V with 0.5 A per channel. It supports channel-level diagnostics and redundancy capability — the diagnostics flag a short-circuit or wire-break per channel, and the redundancy allows a second module to take over without a control-logic change. This module snaps onto the S7-300 DIN rail backplane and connects through the standard 40-pin front connector. It is not compatible with the S7-1200 or S7-1500 backplane — those use a different form factor and bus interface.
Lifecycle reality: EOL hot
If a direct Siemens replacement exists, it would be a different order code — confirm the BOM position before substituting.
Sourcing this module
For a last-time-buy or a spare that covers years of line operation, this is the moment to commit the BOM line. Once the remaining channel stock clears, this order code becomes surplus-only.