Product Overview
The Allen-Bradley 1756-PA75RK is a redundant AC power supply module designed for the ControlLogix platform. This panel-mounted unit accepts 120-220 Volts AC input and delivers a reliable 75 Watts at 60°C to power your control system. Built with a Series B chassis, it supports load sharing between power supplies, enhancing system uptime and redundancy.
Technical Specifications
| Specification |
Value |
| Manufacturer |
Rockwell Automation |
| Brand |
Allen-Bradley |
| Part Number |
1756-PA75RK |
| Series |
ControlLogix |
| Module Type |
Redundant AC Power Supply |
| Input Voltage |
120-220 Volts AC |
| Voltage Range |
85-265 Volts AC |
| Input Power |
115 Watts |
| Input Frequency |
47-63 Hertz |
| Power Output |
75 Watts at 60°C |
| Chassis Series |
B |
| Mounting |
Panel Mounted |
| Weight |
3.2 lb (1.45 kg) |
| Dimensions |
6.9 x 5.7 x 5.4 in |
| Operating Temperature |
32-140°F (0-60°C) |
| Enclosure |
None |
Key Features
- Redundant operation with load sharing capability
- Wide input voltage range (85-265 VAC) for global use
- Status indicators and system recognition relay for monitoring
- Durable design withstands up to 60°C ambient temperatures
- Panel-mounted, Series B chassis for easy integration
Applications
The Allen-Bradley 1756-PA75RK is ideal for critical industrial processes where power redundancy is essential. Common applications include:
- Manufacturing assembly lines requiring uninterrupted PLC operation
- Process control systems in chemical or oil & gas plants
- Material handling systems where downtime is costly
With its robust input range and redundant design, this power supply minimizes the risk of unexpected shutdowns, directly improving operational efficiency and reducing costly downtime.
Installation & Setup
Mount the 1756-PA75RK on a standard panel using the provided mounting holes. Ensure adequate clearance for airflow and wiring. Connect the AC input to the terminal block, observing proper wire sizing (conductor: 2.5 mm² / 14 AWG rated at 90°C) and torque to 0.79 N·m. For redundant operation, connect multiple units and enable load sharing per the ControlLogix documentation.
Maintenance & Reliability
Regularly inspect the power supply for dust accumulation and ensure the ventilation paths are clear. Check all connections for tightness and signs of corrosion. The 1756-PA75RK is engineered for long service life, but periodic testing of the redundant configuration is recommended to confirm failover functionality. Operating within the specified temperature range (0-60°C) ensures optimal performance and longevity.
Compatibility & Integration
This power supply is designed specifically for the Allen-Bradley ControlLogix platform. It integrates seamlessly with ControlLogix chassis and backplanes, providing clean, regulated power to all modules. The redundant capability allows pairing with another 1756-PA75RK to create a fault-tolerant power architecture.
Buying Guide
When purchasing the Allen-Bradley 1756-PA75RK, verify the input voltage requirements of your facility and confirm the chassis series compatibility. Consider ordering a spare unit to maintain redundancy and minimize downtime. PLC Source PRO offers genuine Allen-Bradley parts with reliable availability and competitive pricing.