Siemens 6ES7223-1BL22-0XA0 SIMATIC S7-200 Expansion IO Module

The Siemens 6ES7223-1BL22-0XA0 SIMATIC S7-200 EM223 digital I/O expansion module adds 16 digital inputs and 16 digital outputs to a SIMATIC S7-200 system using S7-22X CPUs. It plugs into the S7-200 backplane to extend discrete I/O with 16 DI and 16 DO at 24 V DC, with a per-channel rating of 0.75 A on the outputs. The digital inputs support 24 V DC signaling with sink/source wiring, while the outputs are transistor-type source outputs capable of sourcing up to 0.75 A per channel. The module operates with a 24 V load supply on L+, and relies on the backplane bus (maximum 5 V DC) for interconnect with the CPU. It is specified for use with S7-22X CPUs, making it a dedicated expansion option for that CPU family. Typical applications include expanding control of sensors, pushbuttons, indicators, and actuators in industrial automation tasks, conveyor lines, and machine control where additional discrete I/O is required without replacing the main controller. The EM223 module carries part number 6ES7223-1BL22-0XA0 and is documented as a spare part within the SIMATIC S7-200 ecosystem.