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The 1756-PA75 is a standard AC chassis-mounted power supply module for the Allen-Bradley ControlLogix automation platform. It is engineered to interface directly with a single-phase incoming line supply, supporting a dual-nominal input configuration of either 120V AC or 240V AC. Operating with a nominal input power rating of 100 VA, this module converts the incoming AC line power into stabilized low-voltage DC rails across the chassis backplane to energize the local processors, I/O modules, and communication adapters. To maintain electrical safety and isolate the system backplane from main line supply fluctuations, the module features a continuous operating isolation voltage rating of 250V (AC/DC).
Highly Integrated Isolation Framework
All-in-One Power and Monitoring Integration
Transparent Hardware-Level Diagnostic Channels
The Allen Bradley 1756 ControlLogix controllers provide a robust and scalable control solution for industrial automation systems. A standard control engine with a development environment provides ease of use. Available with On-Machine models suitable for process, motion, discrete, and high availability applications. For safety protection and electrical interlocking, the module has a continuous operating isolation voltage of 250 volts (V) to prevent electrical interference.
In terms of physical structure, it has an open-style enclosure for use in standard industrial operating environments, with a regulated ambient operating temperature range from 0 to 60 degrees Celsius (°C). During fluctuations in the incoming power grid, this power module has rated hold-up times: 2 cycles at 85V AC at 60 Hz, 6 cycles at 120V AC, and 20 cycles under 220V AC operational conditions, which maintains voltage to ControlLogix applications during short-duration power interruptions.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Allen Bradley 1756-PA75 Power Supply Module Manuals, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Automotive Stamping
Provided stable backplane power to ControlLogix master controller chassis managing body stamping lines, robotic welding stations, and multi-stage assembly skid conveyor systems.
Water & Wastewater Treatment
Installed in central control cabinets for chemical dosing, filtration, and sedimentation basins in municipal pumping stations and water treatment plants to support round-the-clock operations of large-scale distributed I/O.
Oil & Gas Refining & Petrochemical
Used within certified industrial enclosures for crude oil distillation units, hydrocracking sections, and pipeline pumping stations to power core logic controllers.
Metallurgy & Steel Hot Rolling Mills
Allocated backplane voltage to the core PLC architecture governing automatic gauge control and high-speed roller conveyor synchronization in harsh rolling mill environments.
Thermal Power Plant Auxiliary Control
Applied to auxiliary control chassis such as ash handling systems, coal handling terminals, and circulating water pump stations to ensure uninterrupted operation of long-distance network communication modules.
Pharmaceuticals & Biotechnology
Powered main chassis executing multi-axis motion control for fermenters, freeze dryers, and automated packaging lines in FDA-compliant sterile production environments.
When using the 1756-PA75 power module, it features an open-style enclosure and must be installed within an industrial control cabinet meeting IP54 or NEMA 12 dustproof specifications. Physical insertion, removal, and maintenance must strictly be conducted under completely de-energized conditions to prevent high-voltage electrical shock hazards.
During system configuration and field expansion, it is essential to calculate the total power consumption of all slotted modules via software to ensure it does not exceed the 75-watt backplane output limit, preventing accelerated hardware aging or system interruptions caused by prolonged overloading.
The Allen-Bradley 1756-PA75 is a chassis-mounted AC power supply module designed for the ControlLogix automation platform. It functions as the central power distribution interface, converting incoming alternative current into multiple stabilized direct current rails across the chassis backplane.
Users need to plug this module into the designated slot on the far left side of a ControlLogix 1756 chassis. It connects to an external AC source and distributes operating power via the backplane to the CPU, I/O, and communication modules.
What are the DC voltage and current output parameters delivered by the 1756-PA75 to the PLC backplane?
It converts incoming AC power into multiple low-voltage DC lines for the backplane with current capacities of: 1.5 A at 1.2V DC; 4 A at 3.3V DC; 13 A at 5.1V DC; and 2.8 A at 24V DC.
Which PLC chassis are compatible with the 1756-PA75?
It is compatible with all standard Series B ControlLogix chassis, including 4, 7, 10, 13, and 17-slot options.
What is the rated input voltage range of the 1756-PA75?
Its nominal input voltage is 120V/240V AC, while the actual acceptable operational voltage input range spans from 85 to 265 V AC.
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Disclaimer: We are not an authorized distributor or distributor of the product manufacturer of this website, The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because our company is not an authorized distributor of this product, the Original Manufacturer`s warranty does not apply.While many DCS PLC products will have firmware already installed, Our company makes no representation as to whether a DSC PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. Our company also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from our company, its distributors, or any other source. Our company also makes no representations as to your right to install any such firmware on the product. Our company will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.
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