Siemens 6ES7 223-1BH21-0XA0 Digital Input Module

Siemens 6ES7 223-1BH21-0XA0, commonly cataloged as the EM223, is a digital I/O module designed to expand SIMATIC S7-22x CPUs with eight DC 24 V inputs and eight DC 24 V outputs, delivering a compact 8-in/8-out solution for small-to-mid size automation projects. For this model, Siemens specifies compatibility strictly with S7-22x CPUs, making it ideal when you are using the S7-22x family and need direct 24 V logic for sensing devices and controlling 24 V loads. The module's outputs support sink or source wiring and are rated at up to 0.75 A per channel, enabling reliable operation of relays, small actuators, indicator lamps, or other DC devices, while the eight inputs provide straightforward connection to switches and sensors. Part number 6ES7 223-1BH21-0XA0 identifies EM223's 8 DI/8 DO DC 24 V configuration within Siemens' S7-22x I/O family, making it a precise replacement or expansion option for existing EM223 installations and ensuring consistent electrical characteristics across the I/O block.