The Siemens 6ES7223-3AD30-0XB0 is a SIMATIC S7-1200 SM 1223 signal module packing two current-sourcing digital inputs and two MOSFET solid-state digital outputs in a 38 x 62 x 21 mm housing. Typical power loss sits at 0.5 W, and the module is rated for a -40 to 70 °C operating range with vertical installation derated to -20 to 50 °C. Global approvals include cULus, CSA, CE, UKCA (via RCM), FM, KC, and marine, making it straightforward to spec into panels destined for multiple regulatory jurisdictions.
The two digital inputs are current-sourcing (PNP) type, with a rated input voltage of 24 V DC and signal "1" typical current of 15 mA. The input characteristic is defined as: signal "0" at L+ minus 1.0 V DC up to L+, and signal "1" from 0 V up to L+ minus 2.0 V DC — meaning the module expects a sinking-field-device signal (0 V active). The two outputs are MOSFET solid-state, current-sinking/sourcing capable, but each is limited to 0.1 A with resistive load. There is no short-circuit protection on the outputs, so an external fuse or electronic breaker is needed for each channel if the load wiring is exposed to a fault. The 0.1 A per-output limit means this module is suited for driving small pilot relays, LED indicators, or solenoid valves with low holding current — not for direct motor contactors or high-inrush loads. The 50 m maximum shielded cable length on the inputs keeps noise coupling manageable in typical cabinet layouts.