1746-P2 Product datasheet 

1746-P2 Functional Description

The 1746-P2 PLC Module ROCKWELL is a dedicated power supply module designed specifically for the SLC 500 modular automation system, providing reliable power distribution within industrial control environments. This dual-slot module accepts a wide input voltage range of 85-132V AC or 170-265V AC at 47-63Hz, delivering 5A at 5V DC for backplane power and 0.96A at 24V DC for user applications. With robust electrical isolation rated at 1800V AC RMS for 1 second, it ensures safe operation while protecting sensitive control components from power disturbances. The module features comprehensive protection mechanisms including a 15A maximum overcurrent protection and built-in fuse (1746-F2) for short-circuit prevention, though it's primarily designed to mitigate fire hazards rather than protect electronic components.

Installation of the 1746-P2 Allen Bradley Power Supply requires mounting in the leftmost position of the 1746 chassis, with its slot not counted against the system's available I/O capacity. The compact unit measures 5.5×2.9×5.7 inches and weighs 2.5 lbs, featuring an open-type enclosure suitable for panel mounting. Its front panel contains five terminals for AC line and DC power connections, including a dedicated ground terminal, along with configurable jumper pins for selecting between 100/120V AC or 200/240V AC input voltage settings. The Allen-Bradley 1746-P2 SLC 500 Power Supply demonstrates robust performance across an operating temperature range of 0-60°C, making it adaptable to various industrial environments.

Special operational characteristics of the Allen-Bradley 1746-P2 SLC Rack Mounting Power Supply include a 20ms hold-up time at full load (extending to 3000ms at no load), allowing SLC processors to maintain temporary operation during brief power dips. However, prolonged undervoltage conditions beyond the CPU's hold-up time will cause system shutdown until proper voltage is restored. For overcurrent situations, response varies by series - Series A/B initiates complete shutdown requiring program reload, while Series C maintains CPU operation with only 24V user power affected. These intelligent power management features make it a critical component for maintaining system stability.

When working with the AB SLC Rack Mounting Power Supply 1746-P2, proper installation practices are essential to prevent damage. The module is particularly sensitive to voltage surges from high-inductive loads, recommending the use of isolation transformers for added protection. Technicians must exercise caution to avoid creating electrical arcs during wiring, as live connections can damage the electronic backplane. With its combination of reliable power delivery, flexible configuration, and protective features, this power supply module serves as a fundamental building block for robust SLC 500 control system implementations.