Lead: what this module actually does
The ABB DX531 (order code 1SAP245000R0001) is a distributed automation I/O module: 8 digital inputs wired for 115..230 V AC sources, paired with 4 relay outputs switching loads at 24..230 V AC/DC up to 3 A per point. The relay outputs sit on a separate 24 V DC supply (20.4... 28.8 V DC) that powers the module electronics, which is the standard wiring rhythm for the DX53x series in a remote panel.
Output contact envelope
Each relay output is rated 3 A with an output voltage window of 24... 230 V AC/DC and a maximum ceiling of 195.5... 276 V. The 3 A figure is the point rating a control drawing should call out, not the module's aggregate bus current.
Environmental envelope
Operating temperature is 0... +60 °C and the housing is rated to IP20, so the module is built for an enclosed cabinet, not a washdown bay. Mount it inside the panel where the rest of the DX53x rail sits and reserve the IP20 constraint for the enclosure specification rather than the BOM line.
Compliance pack on file
ABB ships this module with a RoHS declaration under EU Directive 2011/65/EU and Amendment 2015/863 (22 July 2019) and a REACH filing dated 2024-12-06, with the SCIP dossier for Germany listed as c9bf362a-cc21-47fa-8a05-4084ee252c86. That is enough paperwork to clear a standard supplier-quality gate on the EU side without additional vendor follow-up.