Product Description
The 1756-PA72K is a ControlLogix AC power supply module designed for installation on the left side of 1756-A4, 1756-A7, 1756-A10, 1756-A13, and 1756-A17 chassis (Series A, B, and C). It operates with an input voltage range of 85-265 VAC (nominal 120-240 VAC) and a line frequency of 47-63 Hz, drawing a maximum of 100 VA/Watts. It provides a maximum output power of 75 Watts within a temperature range of 32-140F. Key specifications include a 20 Amp inrush current, hold-up times of 5-6 cycles depending on input voltage, and current capacities of 1.5A@1.2VDC, 4A@3.3VDC, 10A@5.1VDC, and 2.8A@24VDC. The module weighs approximately 0.95 kg and measures 5.51 x 4.41 x 5.71 inches. Recommended wiring is 14 AWG solid or stranded copper rated for 194F or higher, with a maximum insulation of 3/64 inches, and a conductor screw torque of 5 lb-in. This open-enclosure module complies with the T4 North American temperature code and has storage and operating temperature ranges of -40 to 185F and 32 to 140F, respectively.
Is Your Device Showing These Signs?
The Allen Bradley 1756-PA72K ControlLogix power supply commonly experiences failures due to component degradation from heat and age, resulting in insufficient output voltage for the chassis backplane. Technicians address this by replacing electrolytic capacitors, rectifiers, and other stressed components within the power supply unit. Overcurrent events stemming from downstream module faults can damage the PA72K, necessitating fuse replacements and internal circuit analysis. Furthermore, issues with the inrush current limiter can prevent the power supply from properly initializing, requiring component-level repair or full unit replacement to restore system functionality.
Technical specifications
The 1756-PA72K is a ControlLogix AC power supply module for specific 1756-A chassis. It accepts 85-265 VAC input and provides 75 Watts of output power. It has specific current capacities at different DC voltages, inrush current and hold-up time specifications, and defined wiring recommendations. It's an open-enclosure module compliant with the T4 temperature code and has specified operating and storage temperature ranges.
Our Repair Process for the
1756-PA72K
Our repair process for the Allen Bradley 1756-PA72K ControlLogix power supply begins with a thorough inspection to identify degraded components, particularly electrolytic capacitors and rectifiers, which are replaced to restore proper output voltage. Technicians address overcurrent damage by replacing fuses and conducting detailed circuit analysis to pinpoint and repair any internal faults. We resolve initialization failures caused by inrush current limiter issues through component-level repair or, when necessary, complete power supply unit replacement to ensure full system functionality is restored.
Your Guarantee: Warranty & Lifetime Support
Your satisfaction is our top priority, and we confidently stand behind the quality of our repairs. That's why every repair service is covered by our comprehensive 24-month warranty. Furthermore, we offer lifetime phone support – if you have questions or need assistance related to our repair down the road, we're here to help. Our service commitment is straightforward: we guarantee our work, and if you're not satisfied, we will make it right. Learn More about our Repair process.
Comprehensive Repairs You Can Depend On
We take immense pride in the quality and reliability of our work. Our process goes beyond simply fixing the immediate problem. We perform a comprehensive inspection of your main board (or other equipment) and proactively replace components known to be failure-prone or showing signs of potential future failure. Before any item is returned, it undergoes rigorous functional testing to ensure it meets performance specifications and operates flawlessly. Visit our main Repair Services page to learn more.
Save Significantly
Our primary goal is to save you hundreds, or even thousands, of dollars compared to the cost of new equipment replacement. By repairing existing components, we provide an economical solution that is also eco-friendly. At Roc Industrial, our commitment to integrity and community drives our consistent growth and ensures you receive a reliable, cost-effective solution.
Please Note: Roc Industrial operates as an independent service provider and is not an authorized distributor for the manufacturers or brands mentioned. Consequently, the original manufacturer's warranty is not applicable to items repaired or sold by us. Roc Industrial provides its own 2-year warranty on all repair services performed.