What the 0.75 A per point means for your load wiring
The 6ES7223-1BL21-0XA0 is a SIMATIC S7-200 EM223 expansion module delivering 16 digital inputs (24 V DC, sink/source configurable) and 16 digital outputs (24 V DC, source type) rated 0.75 A per point. That per-channel ceiling covers most solenoid valves, contactor coils, and indicator banks directly without an interposing relay — but a multi-point group driving a single load needs the total draw kept under the module's backplane current budget.
Compatibility — S7-22X CPUs only
This module is built for the S7-22X CPU family only — it connects via the side-expansion bus and is not electrically or mechanically compatible with the S7-1200 or S7-1500 form factor. The 16 inputs accept both sink and source field wiring (PNP or NPN sensors) without a rewire; the 16 source outputs switch 24 V DC loads referenced to the same supply rail.
The 6ES7223-1BL21-0XA0 carries a current lifecycle stage.