1746--0B8

Overview of Allen-Bradley 1746-OB8 SLC 500 Digital DC Output Module

The Allen-Bradley 1746-OB8 is an 8-point digital DC output module designed for the SLC 500 programmable controller system. It provides sourcing DC outputs with an operating voltage range of 10–50 V DC and supports continuous currents up to 1.0 A per output at 30°C. The module is widely used for controlling devices such as solenoids, relays, and small motors in industrial automation.

Key Features of 1746-OB8

• 8 DC sourcing output points grouped as 8 points per common.
• Operating voltage range: 10 to 50 V DC.
• Continuous output current per point: 1.0 A at 30°C, derated to 0.5 A at 60°C.
• Maximum continuous current per module: 8.0 A at 30°C, 4.0 A at 60°C.
• Max ON-state voltage drop: 1.2 V at 1.0 A load.
• Surge current: 3.0 A for 10 ms per point.
• Backplane current consumption: 135 mA at 5 V DC, 0 mA at 24 V DC.
• Signal ON delay: 0.1 ms; OFF delay: 1.0 ms for resistive loads.
• Compact design with dimensions approximately 5 x 2 x 6 inches (13 x 5 x 15 cm).
• Weight: Approximately 0.25 kg (9 oz.).

Technical Specifications

Applications / Use Cases

The 1746-OB8 output module is used in industrial automation to drive devices that require DC sourcing signals, including solenoids, valve actuators, and indicator lamps. Its compact form factor allows for high-density output in SLC 500 systems.