What this part is and what it does
The Siemens 6ES7222-1BF22-0XA8 is a spare-part digital output expansion module for the S7-200 CN family. It provides 8 digital outputs rated at 0.75 A per channel at 24 V DC, drawing 2 W typical from the backplane bus. This is the CN variant — intended for the China-market S7-22X CPU line — and carries CE approval only, not UL or CSA.
Key ratings and what they mean for fit
Each of the 8 outputs is rated 0.75 A for signal '1' — that's the maximum continuous current per channel driving a resistive or inductive load such as a contactor coil or indicator lamp. The module has no internal short-circuit protection, so the buyer must fuse each output group externally or rely on the load's own protection. Typical power loss of 2 W is drawn from the 5 V DC backplane bus; the 24 V DC load supply is separate and must be provided externally.
Panel integration notes
Dimensions are 62 mm deep, 45 mm wide, and 80 mm tall. The 45 mm width occupies one slot.