1756-PAR2 | Allen-Bradley | ControlLogix Redundant Power Supply System Bundle

Product Description

The 1756-PAR2 is a specialized power supply solution designed for high-availability Allen-Bradley ControlLogix systems. This bundle provides the core components necessary to implement a redundant power architecture within a single 1756 I/O chassis, ensuring that your automated processes remain energized even in the event of a single power supply failure.

By utilizing the 1756-PAR2 (Ser A/B), engineers can connect two separate power sources to a redundant power cable, which then feeds the chassis backplane. This configuration is essential for mission-critical applications where a power interruption could lead to significant data loss or hardware downtime. The system automatically balances the load between the supplies and provides diagnostic status indicators to alert maintenance personnel of any input power inconsistencies.

Detailed Technical Specifications

• Model Number: 1756-PAR2

• Brand: Allen-Bradley / Rockwell Automation

• System Type: Redundant Power Supply Bundle

• Input Voltage: 120V / 240V AC (Nominal)

• Input Voltage Range: 85–265V AC

• Input Frequency: 47–63 Hz

• Backplane Output Power: 13 Amps @ 1.2V DC; 13 Amps @ 3.3V DC; 13 Amps @ 5.1V DC; 2.8 Amps @ 24V DC

• Chassis Compatibility: 1756-A4, -A7, -A10, -A13, -A17 (Series B and C)

• Power Dissipation: 40 Watts (maximum)

• Inrush Current: 20 Amps (maximum)

• Operating Temperature: 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit)

• Mounting Configuration: External to the chassis (connects via 1756-CPR2 cable)

• Status Monitoring: Integrated Relay Contact for remote fault signaling

Industrial Application Scenarios

The 1756-PAR2 is typically deployed in centralized control rooms for oil and gas refineries, pharmaceutical cleanrooms, and large-scale utility plants. It provides a layer of electrical fault tolerance that is critical for systems running "hot standby" redundancy modules (like the 1756-RM2), ensuring the power source is as reliable as the controller logic.

Professional FAQ

• Does this bundle include the power supply modules?

  The 1756-PAR2 bundle typically includes the 1756-PA75R power supplies and the necessary mounting hardware. It is designed to work in tandem with the 1756-CPR2 redundant power cable.

• Can I use this with a standard 1756-PA72 or PA75 power supply?

  No, redundant configurations require specific "R" designated power supplies (e.g., 1756-PA75R) which feature the internal circuitry required to synchronize with a second power source.