ABB D-20-0-1103 is an industrial safety relay module from ABB's Safe Flame DFS family, designed as a 2/4 module and powered by 24 VDC. Some listings show REV 3 (ZZ2) while others cite REV 4 NSNP, reflecting the part's multiple revision levels across catalogs. Designed for use in safety circuits to monitor guarded devices and provide failsafe switching within ABB control panels.
