What it is and what the ratings mean
The CI590-CS31-HA-XC (1SAP421100R0001) is a CS31 fieldbus slave that carries 16 configurable digital input/output channels, each switchable to 24 V DC, rated for 0.5 A per channel with transistor outputs. It includes media redundancy – if one trunk cable fails, the slave maintains communication on the remaining path, a practical feature for ring or redundant-line topologies on the CS31 bus. Supply voltage range is 20.4 to 28.8 V DC; the module draws 5 mA from the bus interface for its own logic, separate from the load current handled on the I/O side. The configurable I/O delay can be set between 0.1 and 32 ms, useful for debouncing inputs or tailoring output response in fast cycles. Rated IP20, so it lives in a cabinet. Operating temperature span is -30 to +70 °C, covering most industrial enclosures without forced cooling. WEEE category 5 confirms external dimensions under 50 cm – small enough for a crowded DIN rail.
Integration and wiring notes
Transistor outputs are sourcing (PNP logic) – common positive side. Each output can sink 0.5 A continuous; total package limit isn't stated individually, so derate in high-ambient or dense wiring bundles. The 24 V DC supply powers both the module and the I/O loop; no separate relay coil supply needed. CS31 bus connection uses standard two-wire twisted pair; media redundancy requires a second cable looped back to the master. Dip-switch addressing for slave ID – set before power-up. No Ethernet interface on this variant: only the CS31 serial bus.
Sourcing reality
Active product – quoted to order per RFQ. No published direct cross-reference for this order code.