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
Evolving SCADA System Architectures in Industrial Automation
A robust Supervisory Control and Data Acquisition (SCADA) system serves as the heartbeat of modern industrial operations. Understanding SCADA system architecture is vital for engineers designing efficient control systems. These architectures have evolved from isolated, monolithic structures to highly interconnected, networked ecosystems. Choosing the right design requires balancing data visibility, processing power, and long-term scalability requirements.
Choosing the Right Controller: PLC vs. Motion Controller in Industrial Automation
Selecting the optimal control architecture is a foundational decision in industrial automation. Engineers must frequently choose between a Programmable Logic Controller (PLC) and a dedicated Motion Controller. While both systems manage machinery, their underlying design philosophies differ significantly, impacting performance, scalability, and system integration.
Mastering PLC Power Supply Architectures and Operating Voltages
Selecting the correct operating voltage is a critical step in designing reliable industrial automation systems. Whether you are working with a compact PLC or a large-scale DCS, your power architecture dictates the system's longevity. In this guide, we explore the standard voltage ranges and power distribution strategies required to maintain stable factory automation operations.