Allen Bradley 1756-PA75 ControlLogix AC Power Supply

Product Overview

The Allen-Bradley 1756-PA75 is a ControlLogix Power Supply. This is a Standard Power Supply that is externally powered by an input Voltage range of 85-265VAC, 47-63 Hz. It has an output power rating of 75 W @ 0…+60 °C (+32…+140 °F) and current capacity of 4A at 3.3VDC; 13 A at 5.1VDC and 2.8 A at 24VDC. This module is installed at the left most side of the 1756 chassis.

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Designed as part of the ControlLogix line of products, the 1756-PA75 is an AC Power Supply that is manufactured by Allen-Bradley/Rockwell Automation. This module is non-redundant, and should be mounted on the left side of the Series B chassis from the same line of products. Weighing approximately 1 kilogram (2.5 pounds), the power supply is 140 millimeters (5.5 inches) high, 112 millimeters (4.4 inches) wide, and 145 millimeters (5.7 inches) deep. This power supply features a nominal input voltage of 120 to 240 Volts AC, while providing protection against overcurrent. The transformer load of 1756-PA75 for the aforementioned power input is 100 Volt-Amperes. Reinforced insulation is another outstanding feature of the 1756-PA75, and it was tested for 60 seconds at 3,500 Volts DC. The module has an input frequency rating ranging between 47 and 63 Hertz, and a power supply output of 74 Watts at 60 degrees Celsius.

The 1756-PA75 features a Hold Up Time function that refers to the time between a DC power failure and input voltage removal. The module can tolerate +/- 10% oscillations in AC power supply for 15 minutes, and over 95% of interruptions at AC ports. In addition to this, the module also comes with certifications, such as UL, CSA, CE and so on, and it is designed for use in industrial, hazardous settings. Furthermore, it is worth noting that the power dissipation of 1756-PA75 is 85.3 BTU per hour. It is important to point out that this part features a fuse that cannot be replaced and serves as protection against fire caused by short circuits. The rugged design of the 1756-PA75 is perfect for use in an industrial environment with Level 2 Pollution and application from Category II. This durable module can operate in an environment with temperatures as high as 60 degrees Celsius (140 degrees Fahrenheit) without derating.

The redundant power supplies offer the same features as the standard power supplies, and the following:

• Redundant operation

• Automatic chassis load sharing between the redundant power supplies

• Status indicators for visual operating status of the pair

• Solid-state relay for system recognition of supply status when wired to an input module

• The ControlLogix redundant power supply system is designed to account for operational anomalies in only the power supply (thechassis adapter and power supply cables are excluded)

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