Allen-Bradley 1771-P5 24V DC Power Supply

The Allen-Bradley 1771-P5 is a high-performance DC-to-DC power supply module designed for the Universal I/O chassis system. This unit converts a 24V DC nominal input into a stabilized 5V DC output for backplane components. It primarily supports PLC-5 processors and associated I/O modules within a 1771 rack environment. Engineers often deploy this module in mobile or battery-backed industrial systems where AC power remains unavailable.

Technical Specifications

• Input Voltage Range: 20.5 to 30V DC
• Output Voltage: 5.06V DC
• Maximum Output Current: 8 Amperes
• Input Protection: Internal 5A, 32V normal blow fuse
• Isolation Voltage: 1500V AC (RMS) or 2160V DC for 1 second
• Power Loss Delay: User-adjustable (13.6ms or 60ms)
• Operating Temperature: 0 to 60°C (32 to 140°F)
• Relative Humidity: 5% to 95% (non-condensing)
• Mounting: Direct slot-mount into 1771 I/O chassis

Key Functional Characteristics

The 1771-P5 module features a robust circuit isolation design to protect sensitive PLC components from ground loops. It utilizes a specific keying band to ensure correct alignment within the backplane slots. For systems requiring higher current or redundancy, users can connect two modules in parallel using the 1771-CT cable. The adjustable power loss delay allows the processor to perform an orderly shutdown during voltage fluctuations. This module maintains full rated performance across its entire temperature range without requiring derating.