Siemens 6ES7 223-1BL22-0XA0 Discrete IO Module

Siemens 6ES7 223-1BL22-0XA0 is an EM223 digital I/O module for the SIMATIC S7-200 PLC family, delivering 32 discrete I/O points configured as 16 digital inputs and 16 digital outputs at 24 V DC. The module provides galvanic isolation between external field wiring and the controller, featuring opto-electronic isolation with an isolation test voltage around 500 V and the ability to connect external wiring via removable terminal blocks for easy field wiring management. Its compact footprint measures 137.3 mm in width, 80 mm in height, and 62 mm in depth, and it weighs about 0.36 kg; power is drawn from the controller’s 5 V internal bus (approximately 40 mA) and from an external 24 V supply, with an estimated internal power dissipation around 6 W and a per-input draw of roughly 0.4 mA. For installation, the EM223 supports field wiring up to 150 m for unshielded runs and up to 500 m for shielded runs, enabling flexible distributed automation in S7-200 systems.