1746-OB8 | Allen-Bradley SLC 500 Digital DC Output Module Supplier

What Makes the 1746-OB8 Essential for Your Control System?

When your automation demands robust high-current switching, the 1746-OB8 digital DC output module from Allen-Bradley delivers reliable performance. Part of the SLC 500 series, this module provides 8 outputs with a voltage range of 10-50 Volts DC source, making it suitable for demanding industrial applications. With a total heat dissipation of 6.9 Watts and a backplane current consumption of 135 milliamps at 5 Volts, the 1746-OB8 integrates efficiently into existing systems.

Key Features & Technical Specs of the 1746-OB8

• The 1746-OB8 is a digital DC output module with 8 outputs and no inputs.
• It operates with a voltage range of 10-50 Volts DC source.
• Each output supports 1 or 0.5 amps, with a module total of 8 or 4 amps.
• Backplane current consumption is 135 milliamps at 5 Volts DC.
• Step response is 60 milliseconds in and 2.5 milliseconds out.
• Maximum off-state leakage is 1mA, and maximum on-state voltage drop is 1.2V at 1A.
• Surge current per point is 3A for 10ms maximum.
• Total heat dissipation is 6.9 Watts, with 0.775 Watts per output point.

Industry Applications for the 1746-OB8

In high-current applications, the 1746-OB8 excels at switching DC loads such as solenoids, relays, and indicators. Its 8 outputs per common configuration simplifies wiring in panel layouts. For example, in a packaging line, the module can control multiple actuators simultaneously, reducing system complexity. The module's 60ms input step response ensures timely actuation, while the 2.5ms output step response supports fast cycle times.

Installation Guide for the 1746-OB8

To install the 1746-OB8, first ensure the SLC 500 chassis is powered off. Insert the module into any available slot, securing it with the locking mechanism. Connect the DC power supply within the 10-50 Volt range to the output common terminals. Refer to the user manual for transient pulse precautions when applying external DC supply voltage. Verify all connections before powering up the system.

Maintenance & Reliability Tips for the 1746-OB8

Regularly inspect the 1746-OB8 for dust accumulation and ensure ambient temperature stays between 0°C and 60°C during operation. Store the module in environments from -40°C to 85°C with humidity between 5% and 95% non-condensing. Periodic visual checks of the backplane connections help maintain reliable performance. For long-term reliability, follow the manufacturer's maintenance guidelines.

Compatibility & Integration of the 1746-OB8

The 1746-OB8 integrates seamlessly with Allen-Bradley SLC 500 processors and chassis. It communicates via the backplane, requiring no additional configuration for basic operation. The module is UL-listed, CE compliant, and CSA and C-Tick certified, ensuring broad compatibility in global installations. For detailed integration steps, consult the SLC 500 user manual.

FAQs about the 1746-OB8

Q: What is the maximum current per output on the 1746-OB8?

A: Each output can handle 1 or 0.5 amps, depending on the application.

Q: What is the voltage range for the 1746-OB8?

A: The module operates on 10-50 Volts DC source.

Q: How many outputs does the 1746-OB8 have?

A: It has 8 outputs with 8 points per common.

Q: What is the backplane current consumption of the 1746-OB8?

A: It consumes 135 milliamps at 5 Volts DC.

Q: What certifications does the 1746-OB8 hold?

A: It is UL-listed, CE compliant, and CSA and C-Tick certified.

Q: What is the step response time for the 1746-OB8?

A: The input step response is 60 milliseconds, and the output step response is 2.5 milliseconds.

Product Support & Availability for the 1746-OB8

The 1746-OB8 is available from Petro Auto Tech, an industrial automation parts supplier. In stock and ready to ship, this module supports your SLC 500 system needs. Contact Petro Auto Tech for current lifecycle status and ordering details.