Allen Bradley 1756-PA75/B ControlLogix 85-265VAC Power Supply

Allen Bradley 1756-PA75/B ControlLogix 75W 85-265V AC Power Supply Module

Product Description

The 1756-PA75/B (1756-PA75/B) is a standard-capacity AC power supply module engineered for the Rockwell Automation ControlLogix 1756 chassis system. This module is tasked with converting universal line power into the regulated DC voltages required by the backplane to drive processors, high-speed I/O, and communication modules.

The Series B revision (1756-PA75/B) incorporates optimized circuit protection and enhanced thermal performance, providing 75 Watts of power across a broad environmental temperature range. A critical feature of this unit is its power-loss detection logic; it monitors the incoming AC cycle and provides an early-warning signal to the system, allowing the controller to save operational states and execute a deterministic shutdown before total voltage collapse.

Detailed Technical Specifications

The 1756-PA75/B provides stable power distribution with the following high-fidelity engineering parameters:

• Manufacturer: Allen-Bradley (Rockwell Automation)

• Model/Part Number: 1756-PA75/B

• Series: ControlLogix Power Supplies

• Input Voltage Range: 85–265V AC

• Nominal Input Voltage: 120V / 240V AC

• Input Frequency Range: 47–63 Hz

• Maximum Input Power: 100 VA / 100 W

• Maximum Output Power: 75 W @ 0–60 °C (32–140 °F)

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

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

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

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

• Inrush Current (Max): 20 A

• Hold-up Time: 5 cycles @ 85V AC; 6 cycles @ 120V AC; 25 cycles @ 240V AC

• Isolation Voltage: 250V (continuous), tested at 1500V AC for 60 s

• Conductor Screw Torque: 0.565 N•m (5 lb•in)

• Dimensions: 140 x 78 x 145 mm (5.51 x 3.07 x 5.71 in)

• Weight: 0.95 kg (2.10 lb)