Allen-Bradley 1771-OBD Power Supply

The Allen-Bradley 1771-OBD is a 16-channel digital DC output module for PLC-5 systems, designed to switch field loads from a 10–60 VDC supply with a nominal 48 VDC output. Each of the 16 outputs can deliver up to 2 A, with a total module current up to 8 A, making it suitable for driving relays, solenoids, and other DC loads in a PLC-5 backplane. The module supports a wide field-voltage range of 10–60 VDC and a nominal output voltage of 48 VDC, accommodating various power configurations. Surge capability up to 4 A and an on-state voltage drop around 1.5 VDC help characterize load performance under real-world conditions. The 1771-OBD operates in 0 to 60 °C environments, with storage temperatures from -40 to 85 °C, and weighs about 0.41 kg, enabling straightforward mounting in control enclosures. As part of the PLC-5 1771 family, this I/O module is designed to fit in 16-slot 1771 backplanes, expanding digital output capability in existing PLC-5 installations.