The Allen-Bradley 1769-OB8 is a high-power digital DC output module designed for the CompactLogix™ and MicroLogix™ 1500 controller platforms. Featuring 8 sourcing outputs, this module is specifically engineered to drive heavier industrial loads than standard high-density cards. With a robust current rating of up to2.0A per point(at 30°C), it is the ideal choice for directly switching larger solenoid valves, hydraulic actuators, motor starters, and high-intensity signaling devices without the need for interposing relays.
Technical Specifications
Manufacturer:Allen-Bradley (Rockwell Automation)
Product Line:CompactLogix / MicroLogix 1500
Part Number:1769-OB8
Output Type:24V DC Sourcing (High Power)
Number of Outputs:8 Points
Operating Voltage Range:20.4–26.4V DC
Output Current Rating:* 2.0A per point (at 30°C / 86°F)
1.0A per point (at 60°C / 140°F)
Maximum Surge Current:4.0A for 10ms (repeatable every 2 seconds)
On-State Voltage Drop:1.0V DC at 2.0A
Off-State Leakage Current:1.0 mA
Bus Current Draw:145 mA at 5.1V DC
Power Supply Distance Rating:8 modules
Dimensions:1.38 x 3.43 x 4.65 inches (Single-slot width)
Key Features
High-Current Capability:Unlike standard 16-channel modules that typically offer 0.5A per point, the 1769-OB8 handles up to 2.0A, allowing it to power heavy-duty DC components directly from the PLC.
Sourcing Logic:As a sourcing module, it connects the output to the positive (+V) side of the DC supply when energized. This is the most common wiring standard for North American and European industrial machinery.
Electronic Protection:Includes internal circuitry to help protect the module against short circuits and overcurrent conditions, enhancing the overall reliability of the control station.
Status Indicators:Equipped with 8 green LED diagnostic lights on the front panel, providing immediate visual verification of which outputs are actively energized.
Modular Versatility:Fits seamlessly into any standard 1769 Compact I/O bank, supporting both DIN rail and panel mounting.
