Product Details
Overview
The 1756-PA75R from Allen-Bradley is a redundant power supply designed for ControlLogix systems, providing reliable backup power and high availability in critical automation applications.
Technical Specifications
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Model: 1756-PA75R
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Manufacturer: Allen-Bradley
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Module Type: Redundant Power Supply
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Input Voltage Range: 85–265V AC
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Nominal Input Voltage: 120V/240V AC, 50/60 Hz
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Input Frequency Range: 47–63 Hz
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Maximum Input Power: 120 VA / 115 W
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Output Power: 75 W (0–60 °C / 32–140 °F)
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Inrush Current: 20 A maximum
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Output Current Capacity:
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1.2V: 1.5 A
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3.3V: 4 A
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5.1V: 13 A
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24V: 2.8 A
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Annunciator Power: 240V AC / DC, 50 mA resistive
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Isolation Voltage: 250V continuous, reinforced insulation
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Tested Withstand: 3250V DC for 60 seconds
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Dimensions (HxWxD): 17.5 x 14.5 x 13.7 cm (6.9 x 5.7 x 5.4 in)
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Weight: 1.45 kg (3.2 lb)
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Wire Size Recommendations:
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Power: 2.5 mm² (14 AWG) copper, solid/stranded, 90°C rated
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Annunciator: 0.25–2.5 mm² (22–14 AWG) copper, solid/stranded, 90°C rated
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Wire Category: 3 on annunciator ports, 1 on power ports, 3 on 1756-CPR2 connections
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Conductor Screw Torque: 0.79 N·m (7 lb·in)
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Enclosure Type: Open-style, no enclosure
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Temperature Rating: North American T3C
Features
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Supports fully redundant ControlLogix system configurations
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Provides continuous power isolation and surge protection
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Compact design with robust connectivity for critical applications
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Compatible with ControlLogix chassis and 1756-CPR2 controllers
Applications
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High-availability industrial automation systems
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Mission-critical process control setups
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Redundant power configurations for ControlLogix I/O systems
FAQs
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Q: Can this module operate in a standard single power configuration?
A: Yes, it can function as a standard power supply, but its full redundancy features require a paired module. -
Q: Does it support hot-swapping?
A: Yes, it can be replaced without shutting down the ControlLogix chassis. -
Q: What chassis is it compatible with?
A: Compatible with all standard ControlLogix chassis supporting redundant power supplies.
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
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Industrial automation systems rely heavily on Programmable Logic Controllers (PLCs) to maintain uninterrupted production. When a PLC unexpectedly shifts from Run to Stop mode, whole manufacturing lines stall.
As control systems evolve across modern factory automation, understanding the root causes of these interruptions helps engineers minimize costly downtime. This technical guide breaks down why PLCs trip into Stop mode and provides practical strategies to mitigate system faults.
Understanding Root Causes of Unplanned PLC Stop Mode in Industrial Automation
Modern Programmable Logic Controllers manage execution through distinct operational states: Run, Stop, Start-Up, and Hold. During power-up, a controller initializes memory registers within Stop mode before briefly transitioning to Start-Up mode. During this phase, internal self-diagnostics evaluate system integrity across hardware and user programs. If the controller detects no critical faults, it enters Run mode to execute the control program continuously. However, any severe system anomaly forces the CPU back into Stop mode immediately to prevent erratic machine behavior across the plant floor.