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
Strategic Selection: Choosing the Right SCADA Software for Your PLC Project
In industrial automation, the SCADA (Supervisory Control and Data Acquisition) system acts as the bridge between raw machine data and actionable human intelligence. Selecting the incorrect software platform can lead to integration bottlenecks, scalability issues, and excessive long-term maintenance costs. As an automation consultant with 15 years of experience, I have guided many projects through the selection process. Below are the essential criteria for choosing a platform that ensures both performance and longevity.
Ensuring Operational Continuity: The Strategic Value of Redundant Automation Systems
In modern industrial landscapes, unplanned downtime is the ultimate adversary. For sectors relying on complex PLC and DCS architectures, a single hardware failure can trigger catastrophic production losses. Therefore, implementing redundant automation systems is no longer a luxury; it is a fundamental requirement for mission-critical operations. In this article, I analyze why redundancy remains the backbone of reliable industrial infrastructure.
Selecting the Right Cables for Industrial Automation: A Comprehensive Guide
Selecting the appropriate cabling infrastructure is critical for the success of any industrial automation project. Improper cable selection often leads to signal degradation, system instability, and costly downtime. As an automation engineer, I frequently see projects compromised by poor cabling choices in harsh industrial environments. This guide simplifies the complex landscape of cabling to help you make informed decisions for your PLC, DCS, and control systems.