Allen-Bradley 1771-OBD – PLC-5 digital output module

The Allen-Bradley 1771-OBD is a digital DC output module designed for the PLC-5 automation platform. It provides reliable switching of external devices such as relays, solenoids, valves and indicator lights in industrial control systems.

The module allows PLC controllers to control field devices through 16 discrete outputs. It is commonly used in industrial automation cabinets where dependable output switching and long-term operational stability are required.

Technical overview:
• Product type: Digital output module
• Series: PLC-5 / 1771 I/O
• Output type: DC digital outputs
• Number of outputs: 16 channels
• Output voltage: typically 10–60 V DC
• Maximum output current: approx. 2 A per module (depending on configuration)
• Isolation: optical isolation between logic and field circuits
• Backplane current: approx. 0.75 A @ 5 V DC
• Mounting: 1771 I/O chassis
• Operating temperature: 0°C to +60°C
• Designed for industrial environments

Typical applications:
• Industrial machine control
• PLC-based automation systems
• Production and assembly lines
• Conveyor and material handling systems
• Process automation equipment

About the manufacturer:
Allen-Bradley, part of Rockwell Automation, is a globally recognized manufacturer of industrial automation equipment. The company develops PLC platforms, motion control systems, industrial communication technologies and automation solutions used in manufacturing and process industries worldwide.