S7-200 EM 223 — 8 inputs, 8 outputs, 24 V DC
The Siemens 6ES7223-1BH22-0XA0 is a SIMATIC S7-200 EM 223 digital I/O expansion module, documented as a spare part for S7-22X CPUs. It provides 8 digital inputs rated for 24 V DC (sink/source) and 8 digital outputs rated 24 V DC at 0.75 A per channel, source configuration. Input sensing thresholds are defined: signal '0' from 0 to 5 V, signal '1' from 15 V to 30 V DC, with a typical input current of 4 mA at the '1' state. The module draws up to 80 mA from the 5 V DC backplane bus.
Output channel rating and isolation
Each of the 8 digital outputs is rated for 0.75 A on both resistive and inductive loads. The inductive shutdown voltage is clamped to L+ (-48 V), protecting downstream contacts. Outputs are grouped in blocks of 4 with a maximum group current of 3 A. Both inputs and outputs use optocoupler potential separation, tested at 500 V AC isolation. The module accepts plug-in I/O terminals and supports 2-wire sensors with a maximum permissible quiescent current of 1 mA.
Panel fit and cabling limits
Maximum cable length for shielded sensors is 500 m; for unshielded runs, the limit is 150 m. Typical power loss is 3 W.
The 6ES7223-1BH22-0XA0 carries a current lifecycle stage per the manufacturer's records.