Description

The Allen-Bradley 1746-P1 acts as the primary energy source for SLC 500 modular hardware. This rack-mounted unit converts incoming AC line voltage into regulated DC backplane power. It sustains the operation of the CPU and various I/O modules within the chassis. Furthermore, the internal circuitry filters out electrical noise to protect sensitive processor logic. The module occupies the dedicated power supply slot on the left side of the rack. Consequently, it provides a stable foundation for small to medium-scale automation architectures.

Versatile Input Configuration

This power module effectively manages multiple industrial electrical standards through a dual-range input design. It supports standard 120V AC and 240V AC power grids. Users must manually configure the voltage selection jumper to match the local power source. Additionally, the unit features a high-capacity internal fuse to prevent damage from overcurrent events. The hardware also maintains a brief hold-up time during minor voltage drops. This characteristic prevents unnecessary system resets during transient power fluctuations.

System Capacity and Auxiliary Power

The 1746-P1 delivers sufficient current to power complex modular configurations. It specifically provides 2 Amps at 5V DC directly to the backplane. Moreover, an auxiliary 24V DC output terminal supports external field devices like sensors and switches. This integrated 24V DC source eliminates the need for separate external power supplies in small systems. The rugged housing and thermal management allow for continuous duty in temperatures up to 60°C. These features ensure long-term reliability in diverse manufacturing environments.

Technical Specifications

Installation and Field Wiring

The physical design of the 1746-P1 simplifies the setup of the SLC 500 controller. Large screw terminals provide secure connection points for thick industrial gauge wiring. Protective covers over the terminals enhance operator safety by preventing accidental contact. Furthermore, the unit features integrated mounting tabs for rapid installation onto the SLC chassis. Status LEDs on the front panel confirm the presence of valid output voltages. These design elements collectively reduce the time required for system commissioning and maintenance.