Allen Bradley 1771-OGD PLC-5 AC Digital Output Module

Product Overview

The Allen Bradley 1771-OGD functions as a high-density digital interface for the 1771 Universal I/O chassis, primarily serving legacy PLC-5® architectures. This module provides a combination of 16 discrete AC outputs and 4 discrete inputs, allowing for efficient control of actuators, motor starters, and indicators while simultaneously monitoring field feedback. We supply this unit as 100% brand new and original, offering a mechanical necessity for facilities maintaining high-availability 1771-based control systems.

Technical Specifications

The 1771-OGD utilizes proven AC circuitry to manage field-side loads:

Engineering Advantages

• Optimized I/O Density: The 1771-OGD combines both inputs and outputs within a single slot footprint. This hybrid design maximizes chassis utilization and reduces the need for additional expansion racks in space-constrained control cabinets.

• Direct Load Control: The 120V AC output circuits drive standard industrial loads directly, including solenoid valves and pilot lights. This eliminates the requirement for interposing relays in many standard automation loops, simplifying the overall wiring architecture.

• Rugged Mechanical Construction: Built for the harshest manufacturing environments, the 1771 form factor excels in high-vibration and high-temperature zones. The secure locking mechanism ensures the module maintains a constant electrical connection to the backplane under heavy industrial stress.

• Seamless Legacy Integration: This module requires no specialized adapters or software conversion tools for existing PLC-5 systems. It slots directly into any 1771 chassis, allowing maintenance teams to restore system functionality immediately without modifying proven control logic.

• Simplified Maintenance: The front-facing terminal interface allows for rapid field wiring and continuity testing. Technicians can verify I/O status at the module level, accelerating the troubleshooting process during machine downtime.

FAQs

• Can the 1771-OGD replace other 1771 AC output modules?

  The 1771-OGD features a specific 16-output/4-input configuration. You must verify that your current wiring and PLC memory mapping (I/O image table) match this specific point density before installation.

• Is this product still in factory-sealed condition?

  Absolutely. While the manufacturer has discontinued the 1771 line, we provide this unit as 100% brand new, original stock. Every module arrives in its original packaging to ensure the highest E-E-A-T standards for industrial procurement.

• Does this module require a separate power supply for the 120V AC side?

  Yes. You must provide an external 120V AC power source for the output circuits. The module only draws its logic-side power (5V DC) from the 1771 backplane; the field-side power must comply with your specific load requirements.

• What is the primary installation precaution for the 1771-OGD?

  Ensure you power down the chassis before inserting or removing the module. Check the alignment of the plastic swing arms to ensure the module seats fully into the backplane connectors to prevent intermittent communication faults.