Description
The 1756-PA75R is a ControlLogix redundant AC power supply module designed to provide high-availability power for ControlLogix chassis in critical industrial applications. It supports an input voltage range of 85 to 265V AC (nominal 120/240V AC) at 47 to 63 Hz, making it suitable for global deployment.
Features
- Wide-range AC input voltage support
- Automatic chassis load sharing when used in redundant pairs
- Seamless failover protection with < 5 ms switchover time
- Visual status indicators for real-time health monitoring
- Solid-state relay annunciator output for remote status signaling
- Hot-swappable design for maintenance without system de-energization
Applications
- Water/Wastewater: Chemical dosing and valve control systems
- Oil/Gas/Petrochemical: Pressure loop management and burner gas-feed systems
- Food/Beverage: PID-controlled temperature regulation for mixing and cooking
- Power Generation: Steam governor actuators and cooling tower fan speed integration
Technical Specifications
| Product Model |
1756-PA75R |
| Input Voltage Range |
85-265V AC |
| Input Frequency |
47-63 Hz |
| Output Power |
75 Watts at 60 degC |
| Backplane Output |
5.1V DC / 24V DC |
| Isolation Voltage |
250V (continuous) |
| Operating Temperature |
0 degC to 60 degC |
| Weight |
1.45 kg |
Installation Guidelines
- Ensure all system power is disconnected before handling the module.
- The 1756-PA75R is typically installed on the far-left side of the chassis or remotely via a chassis adapter.
- Align the top and bottom guides of the power supply with the chassis grooves and slide the module until the rear connector fully seats into the backplane.
- Tighten the top and bottom retaining screws to secure the unit.
- For redundant configurations, use the 1756-PSCA2 chassis adapter and 1756-CPR2 cables.
- Use 2.5 mm2 (14 AWG) copper wire rated at 90 degC or greater for power connections.
FAQ
What is the input voltage range for the 1756-PA75R?
The module is auto-ranging and supports an input voltage range of 85 to 265V AC (nominal 120V or 240V AC at 47 to 63 Hz).
Can I use this power supply as a standalone unit?
Yes, it can operate as a standalone supply. However, its primary purpose is to function in a redundant pair configuration for high-availability systems.
What components are required to build a redundant power supply assembly?
To assemble a redundant pair, you need two 1756-PA75R power supplies, a 1756-PSCA2 chassis adapter module, and two 1756-CPR2 redundant power supply cables.
