The Allen-Bradley 1756-PB72 provides essential DC power to the ControlLogix backplane. This module energizes all controllers and I/O cards within the local chassis. It installs specifically into the leftmost portion of the rack. This design allows users to maximize available module slots for processing and communication. Consequently, the unit maintains a stable electrical environment for complex automation tasks. It supports Series A, B, and C chassis for broad system compatibility.
Versatile Voltage Outputs and Input Range
This power supply operates efficiently on a nominal 24V DC input. It converts this source into three regulated DC rails for internal logic. Specifically, it provides 10A at 5.1V DC and 2.8A at 24V DC. It also offers 4A at 3.3V DC for specialized module circuitry. Furthermore, the unit features a wide input range to handle typical industrial power fluctuations. These precise outputs ensure that every component receives the exact power required for high-speed data processing.
Technical Performance and Safety Standards
- Input Voltage Range: 18–32V DC (24V DC Nominal)
- Backplane Current (5.1V): 10 Amperes
- Backplane Current (24V): 2.8 Amperes
- Backplane Current (3.3V): 4 Amperes
- Dielectric Isolation: 3,500V DC for 60 seconds
- Surge Immunity: ±1 kV line-to-line; ±2 kV line-to-earth
- Operating Temperature: 0 to 60°C (32 to 140°F)
- Weight: 0.95 kg (2.10 lbs)
Industrial Reliability and Mounting
Built for harsh environments, the 1756-PB72 includes reinforced insulation and overcurrent protection. It withstands significant mechanical vibration and high humidity levels during continuous operation. An integrated LED on the front panel provides an immediate visual status of the power health. The terminal block resides behind a protective door to ensure secure wiring connections. Additionally, the unit mounts directly to the chassis frame for superior thermal dissipation. This robust construction makes it ideal for heavy manufacturing and process control applications.
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