Product Overview
The Allen-Bradley 1756-PA75K is a ControlLogix AC power supply module designed to deliver reliable power to your automation system. With an input voltage range of 85–265 Volts AC and a nominal input of 120–240 Volts AC, this module ensures stable operation across varying line conditions. Its maximum output of 75 Watts at 60°C supports the power demands of your ControlLogix chassis and associated modules.
Built for industrial environments, the 1756-PA75K operates within a temperature range of 0–60°C and features a rugged, open-frame design. It is a non-redundant power supply intended for left-side mounting in Series B chassis, providing a dependable power source for your control system.
Technical Specifications
| Parameter |
Value |
| Input Voltage (Nominal) |
120–220 Volts AC |
| Voltage Range |
85–265 Volts AC |
| Input Power |
100 Watts |
| Input Frequency |
47–63 Hertz |
| Power Output |
75 Watts at 60°C |
| Chassis Series |
B |
| Mounting Location |
Left Side of Chassis |
| Weight |
2.5 pounds (1.1 kilograms) |
| Dimensions (H x W x D) |
5.5 x 4.4 x 5.7 inches |
| Operating Temperature |
32–140°F (0–60°C) |
The 1756-PA75K provides multiple DC output rails: 1.5A at 1.2V, 4A at 3.3V, 13A at 5.1V, and 2.8A at 24V. It also offers a hold-up time of 2 cycles at 85VAC, 6 cycles at 120VAC, and 20 cycles at 220VAC (all at 60Hz). With a rated isolation voltage of 250VAC continuous, this module ensures safe and stable power delivery.
Key Features & Benefits
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Wide Input Range: Handles 85–265 VAC, making it suitable for global applications.
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Reliable Output: Delivers up to 75W at 60°C, ensuring consistent power to your system.
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Overcurrent Protection: Built-in protection safeguards your equipment from electrical faults.
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Hold-Up Time: Maintains operation during brief power interruptions, reducing downtime.
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Rugged Design: Designed for industrial environments, compliant with Level 2 Pollution and Category II applications.
Industry Applications
The 1756-PA75K is ideal for a wide range of industrial automation applications, including:
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Manufacturing Lines: Provides reliable power to PLC racks controlling assembly and packaging machinery.
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Process Control: Ensures continuous operation of DCS and SCADA systems in chemical or pharmaceutical plants.
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Material Handling: Powers conveyor and sorting systems, minimizing unplanned stoppages.
With its robust design and wide input range, this power supply is a cost-effective solution for maintaining uptime in critical operations.
Installation & Setup
Mount the 1756-PA75K on the left side of a compatible Series B chassis (e.g., 1756-A4, A7, A10, A13, A17). Use 14 AWG copper wire rated for 90°C for input connections. The module is open-frame, so ensure proper airflow and clearance around the unit.
Before powering up, verify that the input voltage is within the specified range (85–265 VAC) and that the chassis is properly grounded. The module is non-redundant; if redundancy is required, consider a redundant power supply configuration.
Maintenance & Reliability
The 1756-PA75K is designed for long-term reliability with minimal maintenance. Periodically inspect the module for dust accumulation and ensure the chassis fans (if any) are operational. The built-in fuse is non-replaceable and protects against short-circuit fires, so do not attempt to replace it.
Operating the module within its specified temperature range (0–60°C) will optimize its lifespan. Power dissipation is 85.3 BTU/hr, so ensure adequate ventilation in the cabinet.
Compatibility & Integration
This power supply is part of the ControlLogix family and is compatible with Series B and Series C chassis, including models 1756-A4, 1756-A7, 1756-A10, 1756-A13, and 1756-A17. It provides power to all ControlLogix modules installed in the chassis.
For system integration, ensure that your controller and I/O modules are compatible with the power outputs provided by the 1756-PA75K. Refer to your system's manual for specific power requirements.
Buying Guide
When purchasing a 1756-PA75K, verify the part number and confirm that the module is in good working condition. Check for any physical damage and ensure that the input voltage range matches your facility's power supply.
PLC Source PRO offers genuine Allen-Bradley automation parts with fast shipping and reliable customer support. Contact us for availability and pricing.