Allen-Bradley 1756-PB75R: Reliable Redundant Power Supply for ControlLogix Systems
The Allen-Bradley 1756-PB75R is a redundant power supply that keeps your ControlLogix system running without interruption. This 1756-PB75R module provides backup power protection to prevent costly downtime in industrial automation applications.
Key Features & Benefits
- Redundant Design: Automatic failover protection
- High Capacity: Delivers 13A at 5.1V for heavy loads
- Wide Voltage Range: Works with 18-32V DC input
- Easy Monitoring: Clear status indicators
- Hot Swappable: Replace while system is running
Technical Specifications
- Brand: Allen-Bradley / Rockwell Automation
- Model: 1756-PB75R (Full Suffix)
- Series: ControlLogix
- Input Voltage: 18-32V DC (24V DC Nominal)
- Output Power: 75W at 60°C
- Current Output:
- 1.5A at 1.2V
- 4A at 3.3V
- 13A at 5.1V
- 2.8A at 24V
- Inrush Current: 30A maximum
- Hold-up Time: 20 milliseconds
- Isolation Voltage: 250V continuous
- Operating Temperature: 0 to 60°C
- Weight: 1.45 kg (3.2 lb)
- Dimensions: 17.5 x 14.5 x 13.7 cm
Installation & Compatibility
This redundant power supply works with 1756 chassis: A4, A7, A10, A13, A17. Use the special 1756-CPR2 cable to connect the power supply to the chassis adapter. For wiring, use 2.5 mm² (14 AWG) copper wire.
Package & Support
- What’s Included: One 1756-PB75R power supply unit
- Quality Promise: 12-month warranty
- Fast Shipping: Available via FedEx, UPS, DHL
Professional FAQ
What is the main purpose of the 1756-PB75R?
It provides redundant power to prevent system shutdown if one power supply fails.
Can I install this module while power is on?
Yes, it supports hot swapping but use caution in hazardous locations.
What cable is needed for redundant setup?
You need the 1756-CPR2 cable to connect to the chassis adapter.
How much output power does it provide?
It delivers 75 watts at maximum operating temperature.
What happens during power failure?
The backup supply takes over within 20 milliseconds hold-up time.
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