1771-P4R

Product Overview

1771-P4R is a redundant power supply module from Allen-Bradley’s PLC-5 system, designed for high reliability in industrial automation environments. It provides stable DC output and supports N+1 redundancy for enhanced system uptime.

Electrical Characteristics

• Input Voltage: 120V AC, 50–60Hz, 1A

• Input Voltage Range: 97–132V AC

• Output Voltage: 5V DC, 8A (See Derating Curve)

• Backplane Current: 300mA @ 5V DC ±5%

Redundancy and Load Capacity

• N+1 Redundancy Output (at 60°C):
  • 8A (2-unit system)
  • 14A (3-unit system)
  • 20A (4-unit system)

• Redundancy Cable: A-B Part No. 941201−02

Power and Thermal Data

• Power Dissipation: 16W (max)

• Adjacent Slot Power Dissipation: 10W (max)

• Thermal Dissipation: 47.8 BTU/hr (max), 6.9 BTU/hr (min)

Environmental and Installation Data

• Isolation Voltage: Withstands 1000V for 60 seconds

• Module Location: 1771-A1B to -A4B or later I/O chassis

• Wire Size: 14 AWG (2.5mm²) stranded copper, rated 60°C or higher

• Insulation Category: 3/64 inch (1.2mm) insulation (max)

• Branch Circuit Protection: 15A maximum (user provided)

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