The 1756-PB72 ControlLogix DC Power Supply Module from Rockwell Automation is a widely used 24V DC chassis power supply designed to deliver stable and regulated backplane power for ControlLogix systems.
It converts 18–32V DC input power into multiple regulated internal rails, supplying processors, communication modules, and I/O modules within the ControlLogix chassis. Known for its reliability and industrial robustness, the 1756-PB72 is commonly deployed in machine automation, packaging lines, automotive systems, process control, and factory automation environments where DC-powered control cabinets are standard.
Its compact chassis-mounted design and strong electrical performance make it a dependable core component for mid-range ControlLogix architectures.
Technical Specifications (Including Size & Weight)
| Parameter | Specification |
|---|---|
| Model | 1756-PB72 |
| Series | ControlLogix Power Supplies |
| Module Type | DC Power Supply Module |
| Input Voltage Range | 18–32V DC |
| Nominal Input Voltage | 24V DC |
| Maximum Input Power | ~95 W |
| Output Power | 75 W (maximum backplane power) |
| Backplane Output (5.1V DC) | 10 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 | ~35–40 ms |
| Isolation Voltage | 250V continuous (reinforced insulation) |
| Protection | Built-in overcurrent protection |
| Mounting Position | Left side of ControlLogix chassis |
| Chassis Compatibility | 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 kg |
Physical Dimensions
- Size (H × W × D): 140 × 112 × 145 mm
The module follows the standard ControlLogix left-side mounting format, allowing easy installation into chassis-based automation systems while maintaining high power stability.
Recommended Related Models
The 1756-PB72 is commonly paired with:
- 1756-PA75 AC power supply module
- 1756-PB75 high-capacity DC power supply
- 1756-L71 / L73 ControlLogix processors
- 1756-EN2T EtherNet/IP communication modules
- 1756-IB16 / OB16 I/O modules
- 1756-A7 / A10 ControlLogix chassis
Popular Allen-Bradley ControlLogix Power Supplies
Common power supply modules in the ControlLogix family include:
- 1756-PB72 standard DC power supply
- 1756-PB75 high-capacity DC power supply
- 1756-PA75 AC power supply module
- 1756-PA72 AC power supply module
- 1756-PB50 compact DC power supply
These modules support scalable and reliable power architectures for industrial automation systems.
