1746-P1 | Allen-Bradley SLC 500 Power Supply Supplier

Introduction to the 1746-P1 Power Supply

When your SLC 500 chassis requires stable backplane power, the 1746-P1 from Allen-Bradley delivers consistent performance. This power supply module is part of the SLC 500 series and provides 2 Amps at 5 Volts DC and 0.46 Amps at 24 Volts DC to the backplane. It accepts an input voltage of 120 to 220 Volts AC at 47 to 63 Hertz, making it suitable for global industrial environments. The 1746-P1 also offers a 24 Volt DC user-power output with a voltage range of 18 to 30 Volts DC, enabling direct sensor or actuator power without an additional supply.

Key Features & Technical Specs

• Input voltage: 120 to 220 Volts AC, 47 to 63 Hertz.
• Input power: 42 Watts, minimizing energy consumption.
• Inrush current: 20 Amps maximum for reliable startup.
• Backplane current: 2 Amps at 5 Volts DC and 0.46 Amps at 24 Volts DC.
• Output voltage range: 18 to 30 Volts DC for user-power applications.
• Operating temperature: 0 to 60 degrees Celsius, suitable for factory floors.
• Fuse protection: uses 1746-F1 or equivalent for short-circuit safety.
• Dimensions: 5.5 x 2.3 x 5.7 inches; weight: 2 pounds (0.9 kilograms).

Cost-Benefit & ROI Perspective

From a cost-analysis standpoint, the 1746-P1 offers long-term value through its 42 Watt input power rating, which reduces electricity costs over the system lifetime. The built-in fuse protection (1746-F1 or equivalent) minimizes downtime by preventing damage from short circuits, saving on repair expenses. With a CPU hold-up time of 20 ms at full load and 3000 ms at no load, the power supply maintains operation during brief voltage dips, avoiding costly production stops. These features together lower total cost of ownership for SLC 500 installations.

Installation & Setup

Mount the 1746-P1 in the leftmost slot of a 1746 chassis, whether main, expansion, or remote I/O rack. Only one power supply is needed per chassis. Before applying power, set the input jumper correctly to match the line voltage; exposed pins carry hazardous voltage when energized. Use a user-supplied overcurrent protection device rated at 15 Amps maximum. For detailed wiring and jumper settings, refer to the official Allen-Bradley installation manual.

Maintenance & Reliability

Inspect the 1746-P1 periodically for dust accumulation and ensure ambient temperature stays within 0 to 60 degrees Celsius. The current capacity derates by 5% when temperature exceeds 55 degrees Celsius, so proper ventilation preserves full output. The fuse (1746-F1 or equivalent) should be checked if the power supply fails to deliver output; replace only with the specified part. Regular inspection per the manufacturer’s safety manual helps maintain reliability and extends service life.

Compatibility & Integration

The 1746-P1 integrates seamlessly with any SLC 500 chassis, including main, expansion, and remote I/O racks. It provides backplane power to all modules in the rack, such as processors, I/O modules, and specialty modules. No additional communication protocols are required for operation; the power supply works directly with the chassis backplane. For systems requiring 24 Volt DC user power, the 18 to 30 Volt DC output supports sensors and actuators within the current limit of 200 mA (as noted in the description_full).

Frequently Asked Questions

Q: What is the input voltage range for the 1746-P1?

A: The input voltage is 120 to 220 Volts AC at 47 to 63 Hertz.

Q: How much backplane current does the 1746-P1 provide?

A: It provides 2 Amps at 5 Volts DC and 0.46 Amps at 24 Volts DC.

Q: What fuse does the 1746-P1 use?

A: It uses a 1746-F1 fuse or equivalent for short-circuit protection.

Q: What is the operating temperature range for the 1746-P1?

A: The operating temperature is 0 to 60 degrees Celsius.

Q: Can the 1746-P1 be used in expansion racks?

A: Yes, it can be installed in any 1746 chassis, including expansion and remote I/O racks.

Product Support & Availability

The 1746-P1 is available from Petro Auto Tech. Please verify current lifecycle status and availability with Petro Auto Tech before ordering. In stock and ready to ship, this power supply supports your SLC 500 system with reliable backplane power.