What this spare-part module fits
The Siemens 6ES7223-1BF22-0XA0 is a SIMATIC S7-200 EM 223 combination digital I/O module carrying 4 digital inputs and 4 digital outputs, both at 24 V DC. It is designated as a spare part for S7-22X CPUs only — not for the newer S7-200 SMART or S7-1200 families.
Input and output ratings at a glance
Each output handles 0.75 A on resistive or inductive loads, with the total current per group limited to 3 A. The outputs include optocoupler isolation and a clamped inductive shutdown voltage to L+ (-48 V). Inputs accept 15 V DC to 30 V DC for signal '1', with a typical 4 mA draw at 24 V DC, and the module supports 2-wire proximity sensors with a maximum permissible quiescent current of 1 mA.