The 1756-PB75 ControlLogix DC Power Supply Module from Rockwell Automation is a high-performance 24V DC input chassis power supply designed to deliver stable and efficient backplane power for ControlLogix automation systems.
Engineered for demanding industrial environments, it provides higher output current capacity compared to earlier PB series modules, making it suitable for large ControlLogix chassis configurations with multiple communication, processor, and high-density I/O modules. The 1756-PB75 is widely used in manufacturing plants, automotive production lines, packaging systems, process automation, and energy facilities where reliability and continuous operation are critical.
Its robust electrical design ensures stable system operation even under fluctuating industrial power conditions.
Technical Specifications (Including Size & Weight)
| Parameter | Specification |
|---|---|
| Model | 1756-PB75 |
| Series | ControlLogix Power Supplies |
| Module Type | DC Power Supply Module |
| Input Voltage Range | 18–32V DC |
| Nominal Input Voltage | 24V DC |
| Maximum Output Power | 75 W |
| Input Power (Max) | ~95 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 | ~35–40 ms |
| Isolation Voltage | 250V continuous |
| Protection Features | Overcurrent and thermal protection |
| Mounting Location | 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 values are consistent with ControlLogix 75W DC power supply specifications. )
Physical Dimensions
- Size (H × W × D): 140 × 112 × 145 mm
The module follows the standard ControlLogix chassis power supply form factor, enabling straightforward integration into existing rack-based systems.
Recommended Related Models
The 1756-PB75 is commonly paired with:
- 1756-PA75 AC power supply module
- 1756-PB72 standard DC power supply module
- 1756-PB75R redundant DC power supply module
- 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 ControlLogix power modules include:
- 1756-PB75 high-capacity DC power supply
- 1756-PB72 standard DC power supply
- 1756-PB50 compact DC power supply
- 1756-PA75 AC power supply module
- 1756-PA72 AC power supply module
These modules provide scalable and stable power architectures for modern industrial automation systems.
