The 1769-PA4 (1769-PA4) is a high-capacity AC expansion power supply engineered for Allen-Bradley CompactLogix and MicroLogix 1500 controller systems. It is designed to provide robust backplane power to extensive I/O configurations, delivering a regulated 5V DC and 24V DC output. This module is essential when the power consumption of high-density analog, specialty, or digital modules exceeds the limits of standard power supplies like the 1769-PA2.
The 1769-PA4 (1769-PA4) features a universal auto-ranging AC input (85–265V AC), allowing for global deployment without manual jumper settings. Its high-output design supports up to 8 I/O modules on either side of the power supply within a single bank, doubling the 5V current capacity of smaller units. Integrated short-circuit protection and reinforced isolation ensure maximum system uptime and hardware protection in demanding industrial environments.
The following specifications define the electrical and environmental parameters for the 1769-PA4:
Manufacturer: Allen-Bradley / Rockwell Automation
Model Number: 1769-PA4
Product Type: AC Expansion Power Supply
Input Voltage Range: 85–265V AC (Auto-ranging)
Nominal Input: 120V AC / 240V AC (50/60 Hz)
Backplane Output (5V DC): 4.0 Amps
Backplane Output (24V DC): 2.0 Amps
Power Consumption: 200 VA @ 120V AC; 240 VA @ 240V AC
Max Power Dissipation: 18.0 Watts
Max Inrush Current: 25 A @ 132V AC
Power Supply Distance Rating: 8 modules (maximum per side)
Isolation Voltage: 250V continuous (Reinforced Insulation Type)
Operating Temperature: 0–60 °C (32–140 °F)
Dimensions (H x W x D): 118 x 70 x 87 mm
Mounting: DIN Rail or Panel Mount
Weight: 0.52 kg (1.15 lbs)
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