Description

Technical Overview

The Allen Bradley 1756-OB32 is a high-density digital output module designed for the ControlLogix automation platform. This module provides 32 solid-state, sourcing DC outputs divided into two isolated groups of 16 channels each. Operating across a flexible voltage range of 10 to 31.2V DC, it delivers precise control for industrial actuating devices such as solenoids, relays, indicators, and motor starters. By utilizing Producer/Consumer communication technology, the module efficiently shares output status and diagnostic data across multiple controllers on a ControlLogix backplane.

Key Technical Characteristics

• Channel Configuration: 32 regular sourcing outputs arranged in two isolated groups of 16 channels per group.
• Operating Voltage Range: 10 to 31.2V DC, accommodating standard 12V DC and 24V DC industrial control circuits.
• Current Ratings: Maximum output current of 0.5A per channel at 50 degrees Celsius, with a total module capacity of 16A.
• Backplane Current Draw: Consumes 300mA at 5.1V DC and 2mA at 24V DC.
• Thermal Dissipation: Maximum power dissipation reaches 4.8W when operating at 60 degrees Celsius.
• Wiring Mechanics: Compatible with 36-pin Removable Terminal Blocks (RTB), specifically the 1756-TBCH or 1756-TBS6H housings.

Industrial Applications

The robust architecture of this module makes it highly effective for high-speed automated environments. Engineers frequently deploy the unit in packaging machinery, material handling systems, and assembly lines where fast output response times are critical. Because the module features electronic fusing to protect individual channels against short-circuit conditions, it prevents localized wiring faults from causing complete system downtime. This fault containment ensures continuous operation in demanding manufacturing settings.