1756-OB32 32-Point Digital Output Module 12/24V DC | Allen-Bradley

The Original New Allen-Bradley 1756-OB32 32-Point Digital Output Module is a high-density sourcing output module for the ControlLogix platform, designed to interface PLC logic with a high volume of field devices in industrial automation systems. Featuring 32 sourcing outputs in a single-slot form factor, this module significantly reduces required rack space and overall system cost for high-I/O count applications. 12/24V DC nominal operation with integrated electronic protection. Fully compatible with ControlLogix controllers and Studio 5000 Logix Designer® environment.

Core Engineering Highlights:
32 sourcing DC outputs | 10-31.2V DC operating range | 0.5A per point @ 50°C, 0.35A @ 60°C | 16A per module @ 50°C, 10A @ 60°C | 300 mA @ 5.1V backplane current | 60 µs ON / 200 µs OFF delay | 50V isolation | 0-60°C operating temperature

Key Features:

• Original New Allen-Bradley 1756-OB32 module

• 32 sourcing DC outputs in two groups of 16

• 12/24V DC nominal, 10-31.2V DC wide operating range

• 0.5A continuous per point @ 50°C with linear derating to 0.35A @ 60°C; 1A inrush current per channel

• 16A max per module @ 50°C, 10A @ 60°C

• Fast output response: 60 µs nominal OFF-to-ON, 200 µs nominal ON-to-OFF

• 50V continuous isolation (group-to-backplane), type tested

• Removable Terminal Block (RTB) design for simplified wiring and maintenance; requires 1756-TBCH (screw clamp) or 1756-TBS6H (spring clamp)

• Backplane current draw: 300 mA @ 5.1V DC, 2 mA @ 24V DC

• Power dissipation: 4.8W max @ 60°C

• High-density 32-point design reduces rack space and system cost

• Electronic keying prevents incorrect module installation

• Diagnostic LEDs for rapid troubleshooting

Applications:

• Control of solenoids, relays, and indicator lamps

• Interfacing with DC-powered output devices in automated systems

• Conveyor and material handling systems

• Manufacturing automation and assembly lines

• Process control valve actuators and motor starters

• OEM equipment and machine control panels

Technical Specifications:

• Catalog Number: 1756-OB32

• Product Type: ControlLogix High-Density DC Digital Output Module

• Outputs: 32 sourcing DC outputs (2 groups of 16)

• Nominal Voltage: 12/24V DC

• Operating Voltage Range: 10-31.2V DC

• Current per Point: 0.5A @ 50°C, 0.35A @ 60°C (linear derating)

• Inrush Current: 1A per channel

• Current per Module: 16A @ 50°C, 10A @ 60°C

• Output Delay (OFF to ON): 60 µs nominal, 1 ms max

• Output Delay (ON to OFF): 200 µs nominal, 1 ms max

• Backplane Current (5.1V): 300 mA

• Backplane Current (24V): 2.0 mA

• Power Dissipation (Max): 4.8W @ 60°C

• Isolation Voltage: 50V continuous (group-to-backplane), type tested

• Removable Terminal Block: 1756-TBCH (screw clamp) or 1756-TBS6H (spring clamp)

• Slot Width: 1

• Enclosure Type: Open-style (IP20 equivalent)

• Weight: Approx. 0.26 kg (0.56 lbs)

• Operating Temperature: 0°C to 60°C

• Storage Temperature: –40°C to 85°C

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

• Certifications: CE, cULus, KC, RCM, UL

• UPC: 662468702997

• Lifecycle Status: Active

System Compatibility:

• Rockwell Automation ControlLogix controllers

• GuardLogix safety controllers

• 1756 ControlLogix chassis (any slot)

• Studio 5000 Logix Designer® application

• RSLogix 5000 programming software

• Requires 1756-TBCH or 1756-TBS6H Removable Terminal Block (ordered separately)

Related Products:

• 1756-TBCH – 36-pin screw clamp terminal block for 1756-OB32

• 1756-TBS6H – 36-pin spring clamp terminal block for 1756-OB32

• 1756-IB32 – 32-point digital input module (complementary)

• 1756-OB16D – 16-point diagnostic output module

• 1756-PA72 / 1756-PB72 – ControlLogix power supplies

PLC ERA is an independent industrial automation distributor supplying 100% genuine Original New products through established global supply channels. Allen-Bradley, ControlLogix, and Studio 5000 are trademarks of Rockwell Automation.