Allen Bradley 1756-OB8 ControlLogix DC Digital Output Module

Overview

The 1756-OB8 is a ControlLogix DC digital output module designed for reliable control of DC field devices in industrial automation systems. With 8 output channels, it ensures precise switching for relays, solenoids, lamps, and other DC loads, while providing integrated diagnostics to monitor channel status and protect against faults.

General Information

Part Number: 1756-OB8

Manufacturer: Allen Bradley

Brand / Country of Origin: Rockwell Automation / USA

Series: ControlLogix

Type: DC Digital Output Module

Number of Outputs: 8 DC Output Channels

Mounting: Chassis-based installation in ControlLogix systems

Technology: Solid-state digital output with integrated diagnostics

Power Specifications

Operating Voltage Range: 10–30 V DC

Nominal Output Voltage: 24 V DC

Backplane Current: 150 mA at 5.1 V DC

Total Backplane Power: 0.77 W

Maximum Continuous Current per Output: 0.5 A

Protection: Electronic overload and short-circuit detection

Status Indicators: Individual output LEDs and module diagnostics LED

Communication & Interface

System Interface: ControlLogix backplane

Communication Method: High-speed chassis communication

Diagnostics: Output status monitoring and fault reporting

Configuration: Software configurable via ControlLogix platform

Operator Interface: Front-panel LED indicators

Wiring Connection: Removable terminal block compatible

Environmental

Operating Temperature: 0°C to +60°C

Storage Temperature: -40°C to +85°C

Relative Humidity: 5% to 95%, non-condensing

Vibration Resistance: Industrial-grade rated environment

Protection Rating: Open-type module for installation within an enclosure

Dimensions & Weight

Dimensions (L × W × H): 144.57 × 22 × 105.42 mm

Weight: 0.34 kg

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