Description

The Allen-Bradley 1771-OB functions as a high-current digital output solution for the PLC-5 platform. This module provides eight independent channels for controlling heavy-duty DC loads. Each output point supports up to 1.5 Amperes of continuous current. Consequently, it drives industrial components like motor starters and large solenoids directly. This capability eliminates the need for external interposing relays in many applications.

Integration and Power Management

The unit derives necessary logic power directly from the 1771 I/O chassis backplane. This streamlined design reduces complex field wiring within the control cabinet. Furthermore, the electronic components maintain a very low on-state voltage drop. This efficiency ensures maximum power reaches the connected field devices. The module also features front-panel status indicators to simplify real-time troubleshooting.

Environmental and Handling Standards

Engineers built this module to survive rigorous factory conditions and temperature fluctuations. However, internal circuits remain sensitive to static electricity. Users must follow strict electrostatic discharge (ESD) precautions during installation. The robust mechanical frame fits securely into any standard 1771 universal I/O chassis. This ensures long-term stability and reliable contact with the system bus.

Technical Specifications