Obsolete – direct replacement available
The 6ES7323-1BH00-0AA0: The direct, form-fit-function replacement is the successor 6ES7323-1BH01-0AA0, which preserves the same 8 DI, 8 DO, 24V DC rating and adds a 1x20 pin header.
Mixed digital I/O slice for S7-300
The SM 323 combines eight digital inputs and eight digital outputs in one 20-pin module, optically isolated, rated for 24V DC with 0.5A per channel and a total aggregate current of 2A across the output group. Designed for a DIN-rail rack in a SIMATIC S7-300 system, it handles discrete sensor and actuator signals within one slot, saving rack space compared to separate input and output modules.
Sourcing an obsolete BOM line
We source this module to order against an RFQ; note that the successor 6ES7323-1BH01-0AA0 is the preferred procurement path for new builds or full swaps. The aggregate current of 2A and 0.5A per output are the same as the successor, so the replacement drops into existing wiring with no electrical re-rating.