Technical Specifications

• Input Power: 85–265 V AC (47–63 Hz) or 85–132 V DC, auto-sensing with max 20A inrush current.
• Backplane Outputs: 5.1V DC @ 10A, 3.3V DC @ 4A, 24V DC @ 2.8A, 1.2V DC @ 1.5A; total max 75W.
• Physical & Environmental: Fits leftmost chassis slot; 14.0 x 11.2 x 14.5 cm; operates at 0–60°C.

 

Main Features and Advantages

• Multi-Rail Backplane Powering: Delivers 5.1V, 1.2V, 3.3V, and 24V DC simultaneously, supporting mixed-voltage modules.
• Built-In Circuit Protection: Includes non-replaceable fused overcurrent protection (max 15A), overvoltage, and thermal shutdown.
• Redundancy Capable: Can be paired with an identical unit via a 1756-CPR cable for seamless failover during outages.

 

Application Field

The 1756-PA72/B​ is a foundational component in large-scale industrial automation systems requiring reliable control power. It is widely deployed in automotive manufacturing assembly lines, continuous process control in oil and gas refineries, and high-speed packaging machinery where consistent backplane voltage is critical for deterministic control.

Related Products

• 1756-PB72/B: 24V DC input version of the same 75W ControlLogix power supply.
• 1756-CPR2: Redundant power supply cable used to connect two 1756-PA72/B modules.
• 1756-A7: 7-slot ControlLogix chassis compatible with the 1756-PA72/B.
• 1756-L71: ControlLogix 5570 series processor that requires the backplane power provided by this module.

 

Installation and Maintenance

Before installation, verify the AC line voltage matches requirements and set the 120/240V jumper accordingly. Slide the 1756-PA72/B​ into the chassis’s far-left slot, secure it with mounting screws, and connect L1, L2, and PE ground using 14 AWG copper wire torqued to 0.8 N·m. For maintenance, monitor the front-panel LEDs—green indicates normal operation, while red signifies a fault such as overload or overheating. If the LED fails to illuminate, check input voltage and wiring integrity before replacing the unit.