The 1771-OBD is a 1771-series 16-point DC digital output module for PLC-5 systems, with a 10 - 60VDC range and max 2A per output to drive industrial DC devices.
The 1771-OAD is a 1771-series 16-point digital AC output module for PLC-5 systems, controlling AC-powered devices with zero-crossing switching and individual fused channels.