Allen-Bradley 1756-PB72K ControlLogix DC Power Supply Module

Technical Specifications Breakdown

Key parameters for the 1756-PB72K are listed below for quick reference:

Industry Applications

The 1756-PB72K supports system uptime by providing consistent 24V DC power to ControlLogix chassis, reducing the risk of unexpected shutdowns.

Installation & Setup Guidance

Mount the module in the leftmost slot of a compatible ControlLogix chassis (e.g., 1756-A17, 1756-A13). Use 2.5 mm² stranded or solid copper wire rated for at least 194°F. Ensure the conductor screw torque is set to 0.565 N-m. The module accepts 18-32 Volts DC input, so verify your DC source is within this range before connecting.

Maintenance & Reliability

Inspect the power supply periodically for signs of overheating or loose connections. The module operates reliably in temperatures from 32 to 140 Fahrenheit (0 to 60 Celsius) and relative humidity between 5 and 95% non-condensing. Keep the chassis area clean and free of debris to ensure proper airflow.

Reliable Power for ControlLogix Systems

The Allen-Bradley 1756-PB72K is a DC power supply module engineered for the ControlLogix platform. It converts a 24 Volts DC input into the multiple voltages required by the chassis backplane, ensuring stable operation of your control system. For maintenance engineers, this module offers a straightforward solution for powering I/O and processor modules in demanding environments.

Compatibility & Integration

The 1756-PB72K is compatible with ControlLogix chassis Series A, B, and C, including models 1756-A17, 1756-A13, 1756-A10, 1756-A7, and 1756-A4. It provides 1.2, 3.3, 5.1, and 24 Volts DC to the backplane, supporting a wide range of I/O and processor modules.

Selection Guide & Purchasing Advice

When selecting a replacement or new power supply for your ControlLogix system, verify your chassis series and input voltage requirements. The 1756-PB72K is a standard DC power supply option. For availability and lifecycle status, contact AutoDCSTech to ensure the module meets your project needs.

Troubleshooting & Common Issues

If the module fails to power up, check the input voltage at the terminals—it must be between 18 and 32 Volts DC. Verify that the chassis is properly grounded and that the module is fully seated in the left slot. Overcurrent protection is rated at 15 Amperes, so inspect for short circuits in the backplane or connected modules.