Product Details
Product Overview
The Allen-Bradley 1756-PA50 functions as the primary power source for ControlLogix 1756 chassis systems. This standard AC power supply converts universal input voltages (85–265V AC) into the specific DC backplane voltages required by processors, communication bridges, and I/O modules. We provide this unit as 100% Brand New original factory stock, ensuring stable current distribution and voltage regulation for your most critical automation racks.
Technical Specifications
| Feature | Specification |
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Product Line | ControlLogix 1756 |
| Input Voltage Range | 85–265V AC |
| Nominal Input Voltage | 120V / 240V AC |
| Current Capacity @ 5.1V | 8.0 A @ 50°C; 6.0 A @ 60°C |
| Current Capacity @ 24V | 2.5 A @ 50°C; 2.0 A @ 60°C |
| Maximum Inrush Current | 30 Amperes |
| Isolation Voltage | 250 Volts (Continuous) |
| Chassis Location | Left Side (Dedicated Slot) |
| Weight | 2.69 lbs (1.22 kg) |
Engineering Advantages
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Universal AC Input Versatility: The 1756-PA50 handles a wide input window from 85V to 265V AC. This eliminates the need for separate regional models, allowing global deployment across different power grids without additional transformers or manual switching.
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Superior Hold-Up Performance: The internal capacitor bank provides a 30ms to 40ms hold-up time. This buffer protects your PLC logic during momentary brownouts or power dips, preventing nuisance trips and keeping the processor in "Run" mode through minor electrical disturbances.
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High-Density Current Delivery: This module delivers up to 8 Amps at 5.1V DC to the backplane. This high capacity supports power-hungry configurations, including high-speed counter modules and multiple EtherNet/IP communication cards within a single 17-slot chassis.
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Integrated Surge Protection: The power supply features a 30A maximum inrush current limit and 250V continuous isolation. These electrical barriers protect sensitive silicon components in the CPU and I/O modules from high-voltage transients often found in heavy industrial environments.
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Vertical Airflow Design: The module’s physical architecture facilitates natural convection. When mounted in the dedicated left-side chassis slot, the 1756-PA50 optimizes heat dissipation, maintaining rated current output even at elevated ambient temperatures up to 60°C.
FAQs
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Can I use the 1756-PA50 in a redundant power supply configuration? No. The 1756-PA50 is a standard power supply for single-supply applications. For redundancy, you must utilize the 1756-PA75R or 1756-PB75R series along with a 1756-CPR2 redundancy cable.
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How do I install the 1756-PA50 into the chassis? This module mounts specifically on the far left side of the 1756 chassis. Align the circuit board with the chassis guides and press firmly until the locking tabs snap into place. Ensure the input wiring follows local NEC or IEC standards for 120/240V AC.
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Does this unit replace the older 1756-PA72? Yes. The 1756-PA50 provides updated electronics and improved efficiency compared to legacy standard AC supplies. It maintains the same physical footprint and backplane compatibility.
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Is this a refurbished or pulled unit? Absolutely not. We guarantee this 1756-PA50 is 100% Brand New and arrives in original factory packaging with intact serial numbers for full warranty and E-E-A-T traceability.
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
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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.