Product Details
Product Description
The Allen Bradley 1771-P4R is a redundant power supply module designed for the PLC-5 system. It ensures reliable operation by supporting N+1 redundancy configurations, making it suitable for critical industrial automation environments where uninterrupted power is essential. Compact and efficient, this module provides stable 5 VDC output with high current capacity and integrated alarm relay functionality.
Technical Specifications
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Manufacturer: Allen Bradley
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Category: PLCs
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Product Line: PLC-5
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Part Number: 1771-P4R
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Weight: 2.00 lbs (0.91 kg)
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Input Voltage Range: 97–132 VAC
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Nominal Input Voltage: 120 VAC
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Input Voltage Frequency: 47–63 Hz
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Module Type: Redundant Power Supply
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Output Voltage: 5 VDC
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Backplane Output Current: 8 Amperes (at 5 VDC)
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Maximum Output Current (N+1 Redundancy): 8A (2-unit system), 14A (3-unit system), 20A (4-unit system)
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Alarm Relay Rating: 250 VAC
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Wiring Block AC Power: A-B PN 941274-05 (Wago PN 231-205/000-008)
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Wiring Block Relay: A-B PN 941274-03 (Wago PN 231-203/000-008)
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Operating Temperature: 32 to 131 °F (0 to 55 °C)
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Storage Temperature: -40 to 185 °F (-40 to 85 °C)
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Relative Humidity: 5–95 % non-condensing
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Max Real Input Power: 59 W
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Max Apparent Input Power: 92 VA
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Max Transformer Load: 148 VA
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Fuse: 1.5 A, 250 V, slow-blow type
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Cabling: Redundancy cable for P4R (included)
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Location: 1771 Chassis, 1 Slot
Application Scenarios
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Designed for PLC-5 systems requiring redundant power supply for critical operations
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Ideal for manufacturing, process control, and continuous operation environments
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Provides fault tolerance and system reliability in multi-unit redundancy setups
FAQ
Q: Can the 1771-P4R operate independently without redundancy? A: Yes, it can function as a single power supply, but its primary design is for redundant configurations.
Q: What is the maximum redundancy supported? A: Up to four units can be paralleled, providing a maximum of 20A output at 60 °C.
Q: Is the redundancy cable included? A: Yes, the redundancy cable is supplied with the module.
Comparison with Similar Models
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1771-P4R: Redundant power supply, supports N+1 configurations, 5 VDC output
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1771-P7: Standard power supply, no redundancy support, lower current capacity
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1771-P4S: Single power supply version, suitable for non-critical applications
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Understanding Types of Noise in Electronic Circuits and Control Systems
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Why 24V DC Power Supplies Standardize Modern Industrial Automation
Industrial control cabinets worldwide rely on 24V DC as the universal power standard for field instrumentation, sensors, and controllers. Walk into any manufacturing plant, and you will find PLCs, human-machine interfaces (HMIs), and smart actuators running on extra-low voltage DC. Standardizing on 24V DC enhances operational safety, lowers cabinet footprint, and maintains steady control performance across factory networks.
Essential Motion Control Commands: A Practical Guide for Engineers
Automation engineers often rely on precise position and speed control to drive modern factory machinery. Modern industrial systems, such as Programmable Logic Controllers (PLCs) and Distributed Control Systems (DCS), depend heavily on standardized motion instructions. Mastering these commands ensures operational safety, protects mechanical components, and optimizes cycle times across production lines.