The 1771-P4R is a redundant power supply module used with the Allen-Bradley 1771 PLC series. It increases system uptime by allowing two power supplies to operate simultaneously, with one serving as a backup. This ensures continuous operation by preventing system shutdowns during power supply failures. The module provides a 5 VDC output and supports up to 8A of output current. It is designed for efficient performance in critical applications, offering reliable protection for industrial automation systems.

Technical Specifications

• Part Number: 1771-P4R
• Category: PLCs/Machine Control
• Subcategory: PLC Module/Rack
• Input Voltage Range: 97-132 VAC
• Frequency: 47-63 Hz
• Output Voltage: 5 VDC
• Output Current: 8A
• Max Output Current with N+1 Redundancy:
  • 2 units: 8A
  • 3 units: 14A
  • 4 units: 20A
• Operating Temperature Range: 32 to 131°F (0 to 60°C)
• Storage Temperature: -40 to 185°F
• Relative Humidity: 5-95%, non-condensing
• Alarm Relay Rating: 250 VAC
• Max Power Dissipation: 16W
• Thermal Dissipation: 47.8 BTU/hr
• Backplane Output Current: 8A at 5 VDC
• Fuse: 1.5A, 250V AC, slow-blow
• Cabling: Redundancy cable included
• Certification: CSA, NEMA, UL certified
• Dimensions: 11.0 in x 1.0 in x 7.0 in (27.9 cm x 2.5 cm x 17.8 cm)
• Weight: 2 lbs (0.9 kg)