1746-OB32 | Allen-Bradley SLC 500 Digital DC Output Module Supplier

What Is the 1746-OB32?

When your automation system demands reliable switching of multiple DC loads, the 1746-OB32 from Allen-Bradley delivers. This SLC 500 Digital DC Output Module provides 32 outputs at 24 VDC nominal, with 16 points per common. It is designed for high-current applications and fits into any 1746 chassis except slot 0. As a sourcing module, it energizes pilot lamps, buzzers, solenoids, and motors within its 5-50 VDC range.

Key Features & Technical Specs

• Manufactured by Rockwell Automation under the Allen-Bradley brand.
• Part of the SLC 500 series, module type Digital DC Output Module.
• 32 outputs with 16 points per common.
• Voltage range: 5-50 VDC; nominal output 24 VDC.
• Current per output: 0.5-0.25 A; total module current: 8 A.
• Backplane current at 5 V: 190 mA.
• Signal delay ON: 0.1 ms; OFF: 1.0 ms.
• Step response: 60 ms in, 2.5 ms out.
• Operating temperature: 0 to 60 °C (32 to 140 °F).

Real-World Applications

In manufacturing lines, the 1746-OB32 reliably controls solenoid valves and indicator lights. For material handling, it actuates motors and alarms. Its high-current capacity suits applications requiring simultaneous switching of multiple DC loads. When electrical noise is a concern, interposing relays can isolate the module from legacy wiring.

Installation & Setup

Install the 1746-OB32 in any available slot of a 1746 chassis except slot 0. Use the included Removable Terminal Block (RTB) for wiring. Ensure wire sizes allow the module door to close fully. For proper termination, consider Allen-Bradley 1746-N3 or 1492 wiring systems. Always follow the SLC 500 installation manual for power and grounding.

Maintenance & Reliability

Regularly inspect the module for dust and debris. Verify that all LEDs illuminate correctly during operation. The module withstands 30G shock and 2.5G vibration at 10-200 Hz. Operate within 0-60 °C and 5-95% non-condensing humidity for maximum lifespan. Periodic checks of terminal connections prevent signal loss.

Compatibility & Integration

The 1746-OB32 integrates with SLC 500 fixed and modular controllers. It communicates via the backplane, drawing 190 mA at 5 V. Use with 1746 power supplies and chassis. For remote I/O applications, pair with appropriate communication adapters. Refer to the SLC 500 selection guide for full compatibility.

Common Questions About the 1746-OB32

Q: What is the output voltage of the 1746-OB32?

A: The nominal output voltage is 24 VDC, with an operating range of 5-50 VDC.

Q: How many outputs does the 1746-OB32 have?

A: It has 32 outputs, organized as 16 points per common.

Q: What is the backplane current draw?

A: It draws 190 mA from the 5 V backplane supply.

Q: Can the 1746-OB32 be used in hazardous locations?

A: Yes, it is UL listed for Class I, Division 2, Groups A, B, C, D hazardous locations.

Q: What is the signal delay for the outputs?

A: The ON delay is 0.1 ms, and the OFF delay is 1.0 ms.

Product Support & Availability

The 1746-OB32 is in stock and ready to ship from Petro Auto Tech. Contact our team for current lifecycle status and ordering details. We provide fast delivery and expert support for your automation needs.