Allen-Bradley 1769-OB8: High-Current DC Sourcing Output Module

The 1769-OB8 from Allen-Bradley delivers robust performance for demanding DC output applications. This 8-channel, 24V DC sourcing module provides high-current driving capability, making it ideal for controlling solenoids, relays, and indicators. It seamlessly integrates with CompactLogix controllers and MicroLogix 1500 systems for flexible automation solutions.

Core Technical Specifications

• Brand & Manufacturer: Allen-Bradley / Rockwell Automation
• Model Number: 1769-OB8
• Module Type: 24V DC Sourcing Digital Output
• Output Channels: 8 points, grouped as 2 isolated banks of 4
• Operating Voltage Range: 20.4 to 26.4 Volts DC
• Surge Current: 4 Amps for 10 milliseconds (repeatable every 2 seconds)
• Backplane Current Draw: 145 mA at 5.1V DC
• On-State Voltage: 30V DC maximum
• Off-State Leakage Current: 0.5 mA maximum

Compatibility & System Integration

• This module is part of the versatile 1769 series Compact I/O family.
• It works with CompactLogix controllers and MicroLogix 1500 for expansion I/O.
• You can use it with network adapters like the 1769-AENTR (EtherNet/IP) or 1769-ADN (DeviceNet).

Installation & Mounting

• You can mount the module on a standard DIN rail or directly to a panel.
• Use the replacement terminal block (1769-RTBN18) if needed for wiring.
• Ensure you lock all bus connectors together for proper electrical communication.
• The module supports a wire size range from 22 to 16 AWG for stranded copper.

Key Features & Capabilities

• The module offers configurable output states for fault conditions.
• It provides a high inrush current capability for inductive load switching.
• Each of the two groups can be wired to a different DC power source.
• The input data file reflects the commanded output state, not the terminal status.

Packaging & Shipping Details

• You will receive one 1769-OB8 DC output module.
• The package includes the module door and its corresponding label.
• Shipping weight is approximately 2 pounds with dimensions of 8x8x5 inches.
• We ship all orders via major carriers: FedEx, UPS, and DHL.

Warranty Information

• We provide a 12-month warranty on this product from the date of purchase.
• The warranty covers defects in materials and workmanship under normal use.
• Please contact our support team to initiate any warranty service claims.

Frequently Asked Questions (FAQ)

• What does "sourcing" output mean for this module?

The module provides the positive voltage (24V DC) to the load. You connect the other side of your load to the common terminal (DC negative).

• What is the maximum continuous current per output point?

Each output on the 1769-OB8 can handle a continuous current of 2 Amps under normal operating conditions.

• Can I use this module to directly start a small DC motor?

Yes, its high surge current rating makes it suitable for starting small motors, motorized valves, and other inductive loads.

• How does the module handle a wire break or short circuit?

The module's internal circuitry does not directly report field wiring faults. The controller only sees the data echo from its output command.

• What replacement parts are available for this module?

You can order a replacement door (1769-RD) and a replacement terminal block (1769-RTBN18) separately if needed. © 2025 Ubest Automation Limited. All rights reserved. Original Source: https://www.ubestplc.com/ Contact: sales@ubestplc.com Phone: +86 180 3000 5825