Allen-Bradley 1746-P4 SLC 500 Chassis Power Supply Module

Product Overview

The Allen-Bradley 1746-P4 serves as the high-capacity power foundation for the SLC 500 modular hardware platform. It mounts directly to the left side of any 1746 chassis, providing regulated DC backplane power to the CPU and I/O modules. This specific model delivers a robust 10 Amps at 5V DC, making it the ideal choice for large, high-density chassis configurations that exceed the limits of standard power units. We offer this component in 100% Brand New, original condition, ensuring your legacy infrastructure maintains factory-standard stability and performance.

Technical Specifications

Engineering Advantages

• High-Density Power Delivery: The 1746-P4 provides double the 5V DC current capacity of standard SLC power supplies. This allows engineers to populate 10-slot and 13-slot chassis with power-hungry specialty modules, such as high-speed counters or analog interfaces, without risking voltage drops or system resets.

• Extended Hold-up Performance: Integrated capacitors provide a 20 ms hold-up time at full load. This buffer allows the CPU to execute safe shutdown routines or bridge minor power sags, preventing data corruption during unstable line conditions.

• Global Voltage Versatility: The unit accepts a wide input range from 120V to 220V AC. This adaptability simplifies spare parts inventory for global facilities and ensures compatibility with various international power grids.

• Thermal Efficiency: Optimized circuitry minimizes heat dissipation during AC-to-DC conversion. This prevents localized hotspots within the 1746 chassis, extending the operational lifespan of the adjacent processor and I/O cards.

• Robust Circuit Protection: An internal, replaceable 1746-F1 fuse shields the backplane from input surges. This hardware-level protection isolates the expensive CPU and I/O modules from external electrical faults.

FAQs

• How do I know if I need the 1746-P4 instead of the 1746-P1 or P2?

  You must calculate the total current draw of all modules in your chassis. If your 5V DC requirement exceeds 5 Amps, or if your 24V DC auxiliary requirement is high, the 1746-P4 becomes mandatory to prevent power-overload shutdowns.

• Can I replace the fuse myself if it blows?

  Yes. The 1746-P4 uses a standard 1746-F1 fuse. Always disconnect the main AC power before opening the fuse access door to ensure technician safety.

• Is this unit compatible with all SLC 500 chassis?

  The 1746-P4 mounts to any standard 1746 chassis (A4, A7, A10, A13). It occupies the dedicated power supply slot on the far left, leaving all numbered slots available for I/O and processors.

• Is this a refurbished or "New Old Stock" (NOS) unit?

  We guarantee this unit is 100% Brand New. It ships in the original Allen-Bradley factory packaging with intact security seals, ensuring the internal capacitors and components are fresh and have zero previous field hours.