The ABB 1SAP484100R0001 is a DX581 safety digital I/O module built for machine safety zones that need up to SIL3 on the inputs and SIL2/3 on the outputs. It carries 8 fail-safe inputs (SDI), 4 of which can be raised to SIL3, plus 8 fail-safe outputs (SDO) rated at 0.5 A per channel. Four pulse outputs are available for encoder or counter applications. Supply voltage is 20.4–28.8 V DC, input current 7 mA per channel. Operating temperature -30 to +70 °C.
Housing is IP20; mount on a standard DIN rail in a control cabinet. No UL or ATEX certificates appear in the listing — check your site's zone rating locally.