The 1756-PH75 ControlLogix Power Supply Module from Rockwell Automation is a high-performance 125V DC input chassis power supply designed for ControlLogix systems requiring stable and efficient backplane power distribution.
Unlike standard 24V DC or AC input supplies, the PH75 is engineered for high-voltage DC industrial power environments, making it suitable for specialized installations where 125V DC control power systems are used. It provides reliable power to processors, communication modules, and I/O modules within a ControlLogix chassis, ensuring stable PLC operation in continuous industrial processes.
This module is commonly found in utility systems, heavy industrial plants, power generation facilities, and infrastructure automation applications where high-voltage DC distribution is standard.
Technical Specifications (Including Size & Weight)
| Parameter | Specification |
|---|---|
| Model | 1756-PH75 |
| Series | ControlLogix Power Supplies |
| Module Type | High-Voltage DC Power Supply |
| Input Voltage Range | 90–143V DC |
| Nominal Input Voltage | 125V DC |
| Output Power | 75 W |
| Backplane Output (5.1V DC) | 13 A |
| Backplane Output (3.3V DC) | 4 A |
| Backplane Output (1.2V DC) | 1.5 A |
| Backplane Output (24V DC) | 2.8 A |
| Inrush Current | Up to ~30 A |
| Hold-up Time | ~30–50 ms (load dependent) |
| Isolation Voltage | 250V continuous |
| Protection Features | Overcurrent, thermal protection |
| Mounting Position | Left side of ControlLogix chassis |
| Compatible Chassis | 1756-A4 / A7 / A10 / A13 / A17 |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Relative Humidity | 5%–95% non-condensing |
| Weight | ~0.95–1.05 kg |
(Technical data based on Rockwell ControlLogix PH-series specifications.)
Physical Dimensions
- Size (H × W × D): 140 × 112 × 145 mm
The module follows the standard ControlLogix left-mounted power supply format, allowing straightforward integration into existing chassis systems while supporting high-voltage DC input operation.
Recommended Related Models
The 1756-PH75 is commonly used alongside:
- 1756-PB75 DC power supply module
- 1756-PA75 AC power supply module
- 1756-PB72 standard DC power supply
- 1756-L71 / L73 ControlLogix controllers
- 1756-EN2T / EN3TR communication modules
- 1756-IB16 / OB16 I/O modules
- 1756-A7 / A10 chassis systems
Popular Allen-Bradley ControlLogix Power Supplies
Common ControlLogix power supply modules include:
- 1756-PH75 high-voltage DC power supply
- 1756-PB75 standard DC power supply
- 1756-PB72 DC power supply
- 1756-PA75 AC power supply
- 1756-PA72 AC power supply
These modules support different industrial power architectures, from AC mains systems to DC bus infrastructures.
