The 1756-PB50 ControlLogix DC Power Supply Module from Rockwell Automation is a compact and efficient 24V DC input power supply designed to deliver stable backplane power for ControlLogix chassis systems.
It converts 18–32V DC input power into regulated ControlLogix backplane voltages, ensuring reliable operation of processors, communication modules, and I/O modules in industrial automation environments. The 1756-PB50 is widely used in machine control systems, OEM equipment, automotive production lines, packaging machines, and process automation systems where DC-powered control cabinets are preferred.
With its robust design and stable power output, it provides a dependable foundation for mid-size ControlLogix configurations.
Technical Specifications (Including Size & Weight)
| Parameter | Specification |
|---|---|
| Model | 1756-PB50 |
| Series | ControlLogix Power Supplies |
| Module Type | DC Power Supply Module |
| Input Voltage Range | 18–32V DC |
| Nominal Input Voltage | 24V DC |
| Output Power | 60 W (max) |
| Output Voltage (Backplane) | 1.2V / 3.3V / 5.1V / 24V DC rails |
| 5.1V DC Current Capacity | Up to 8 A @ 50°C |
| 3.3V DC Current Capacity | Up to 2 A |
| 1.2V DC Current Capacity | Up to 1.5 A |
| 24V DC Current Capacity | Up to 2.5 A |
| Inrush Current | Max 30 A |
| Hold-up Time | ~30 ms |
| Isolation Voltage | 250V continuous |
| Power Dissipation | ~10–12 W |
| 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 | ~0.77–0.82 kg |
Physical Dimensions
- Size (H × W × D): 140 × 78 × 145 mm
The slim and compact DC power module design allows efficient installation in ControlLogix chassis while maintaining strong power delivery performance for multiple I/O and processor modules.
Recommended Related Models
The 1756-PB50 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 ControlLogix power supply modules include:
- 1756-PB50 DC power supply module
- 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
These modules support scalable DC or AC-powered automation architectures.
