SIMATIC S7-1200 SM 1223, Digital Input 16x24VDC, Digital Output 16×24 VDC Sink PLC Expansion Module
$374.08 – $415.64
SM 1223 — combined digital I/O module, 16DI / 16DO sink (NPN), both 24V DC.
Technical Specifications
| Module Type | Digital I/O |
| Digital Inputs | 16x 24V DC |
| Digital Outputs | 16x 24V DC, sink (NPN) |
Typical Applications
Sink-output variant of the SM 1223 16DI/16DO module, used where sinking-logic (NPN) field devices are the installation standard.










