CPU lock — S7-21X only
The 6ES7223-1PH00-0XA0 is a SIMATIC S7-200 EM 223 digital I/O module that mates exclusively with S7-21X CPUs. It provides 8 digital inputs at DC 24 V and 8 relay outputs in a single expansion module.
I/O mix and panel fit
The 8 relay outputs handle AC or DC loads up to the contact rating — useful for driving contactors, solenoid valves, or indicator lamps directly without an interposing relay. The 8 DC 24 V inputs sink 5 mA per channel typical, compatible with standard 3-wire proximity sensors and pushbuttons.