1756-PB72/C 1756-A7/C | Allen Bradley | 24V DC 7-Slot Bundle

Allen Bradley 1756-PB72/C ControlLogix 24V DC Power Supply with 1756-A7 Chassis Bundle

Product Description

The 1756-PB72/C (1756-PB72/C) is a high-reliability DC-to-DC power supply module engineered for the Allen-Bradley ControlLogix platform. This specific bundle includes the 1756-A7 (1756-A7/C) 7-slot chassis, providing a ready-to-deploy foundation for industrial automation racks. The power supply converts a nominal 24V DC input into the regulated voltages required by the backplane to drive Logix5000 processors, communication bridge modules, and high-density I/O.

The Series C revision of the 1756-PB72 (1756-PB72/C) features enhanced circuitry to manage voltage fluctuations and inrush current more effectively than previous iterations. A critical safety feature is its integrated diagnostic signaling; the module monitors the input rail and notifies the controller of imminent power failure, allowing the system to save critical retentive data and execute an orderly shutdown before the backplane loses logic power.

Detailed Technical Specifications

The 1756-PB72/C and 1756-A7/C combination provides the following engineering parameters:

• Manufacturer: Allen-Bradley (Rockwell Automation)

• Power Supply Model: 1756-PB72/C

• Chassis Model: 1756-A7/C (7-Slot)

• Input Voltage Range: 18–32V DC

• Nominal Input Voltage: 24V DC

• Maximum Input Power: 95 Watts

• Maximum Output Power: 75 Watts @ 0–60 °C

• Backplane Current Capacity (1.2V DC): 1.5 Amperes

• Backplane Current Capacity (3.3V DC): 4.0 Amperes

• Backplane Current Capacity (5.1V DC): 13.0 Amperes @ 40 °C; 10.0 Amperes @ 50 °C; 6.0 Amperes @ 60 °C

• Backplane Current Capacity (24V DC): 2.8 Amperes

• Inrush Current (Max): 20 Amperes

• Hold-up Time: 35 ms @ 18V DC; 40 ms @ 24V DC; 40 ms @ 32V DC

• Isolation Voltage: 250V Continuous (Basic Insulation Type)

• Chassis Slots: 7 Slots (Horizontal mounting)

• Operating Temperature: 0°C to +60°C (32°F to 140°F)