Overview
The 6ES7223-5BH50-0XB0 is a Siemens SIMATIC S7-1200 G2 SM 1223 digital I/O module providing 8 digital inputs at 24 V DC (sink/source) and 8 digital outputs at 24 V DC, 0.5 A per channel, using sourcing transistor technology. This module is part of the SM 1223 series for the S7-1200 G2 controller family, occupies a single-width slot on the DIN rail, and is rated for in-cabinet use with an IP20 enclosure.
Function & operation
The 8 digital inputs accept 24 V DC signals from sensors, pushbuttons, or limit switches, configurable as sink or source to match the field wiring convention. Each input is optically isolated and filtered for industrial noise rejection. The 8 digital outputs are sourcing transistor type, switching 24 V DC loads up to 0.5 A per channel — suitable for driving contactor coils, indicator lamps, and small solenoid valves directly. The total current per module is limited by the backplane supply; derating applies when all channels are active simultaneously. The module communicates with the S7-1200 G2 CPU via the internal backplane bus, appearing as a standard I/O device in TIA Portal. No external wiring for communication is needed beyond the 24 V DC supply and the field I/O connections.
Applications
SM 1223 digital I/O modules are used in machine-level automation within the S7-1200 G2 ecosystem — packaging lines, material handling stations, conveyor controls, and small process skids where a mix of discrete sensors and actuator outputs is required.