1756-PA75/A

Overview of Allen Bradley 1756-PA75

The Allen Bradley 1756-PA75 is a ControlLogix power supply module engineered for reliable performance in industrial automation systems. This standard AC power supply accepts a broad input voltage range of 85 to 265 VAC at frequencies between 47 and 63 Hz, making it adaptable to various power grid conditions globally. It delivers a maximum output power of 75 watts within an operating temperature range of 0 to 60 °C (32 to 140 °F). Designed to mount on the leftmost side of a 1756 chassis, the 1756-PA75 supports multiple voltage outputs required by the backplane, including 5 VDC at 13 A, 3.3 VDC at 4 A, 1.2 VDC at 1.5 A, and 24 VDC at 1.75 A. Its compact size and versatility make it suitable for a range of ControlLogix automation applications. The module’s built-in status LEDs provide clear indication of operational status, ensuring ease of monitoring during operation.

Key Features of Allen Bradley 1756-PA75

• Wide AC input voltage range: 85–265 VAC, 47–63 Hz
• Maximum output power of 75 W at 0–60 °C
• Multiple DC output voltages: 5 V (13 A), 3.3 V (4 A), 1.2 V (1.5 A), 24 V (1.75 A)
• Compatibility with 1756 ControlLogix chassis (leftmost slot installation)
• Status LEDs for quick visual diagnostics
• Power dissipation approximately 85 BTU/hr
• Hold-up time ensuring power continuity during voltage dips
• Compact dimensions for space-efficient panel design
• User-installable with no additional connection cables required
• Reinforced insulation isolating power input from backplane

Technical Specs of 1756-PA75

Specification	Details
Input Voltage Range	85–265 VAC
Input Frequency	47–63 Hz
Output Power	75 W @ 0–60 °C (32–140 °F)
Output Voltages and Currents	5 VDC @ 13 A, 3.3 VDC @ 4 A, 1.2 VDC @ 1.5 A, 24 VDC @ 1.75 A
Power Dissipation	85 BTU/hr
Dimensions (L×W×H)	14.0 × 11.2 × 14.5 cm (5.51 × 4.41 × 5.71 in.)
Mounting	Left side of 1756 chassis
Weight	~0.95 kg (2.1 lb)

Applications / Use Case

The Allen Bradley 1756-PA75 power supply is essential in ControlLogix automation systems, providing stable and consistent power to controllers, I/O modules, and communications equipment within manufacturing and processing environments. Its wide input voltage adaptability makes it ideal for facilities with variable grid conditions or global installations. Typical applications include assembly lines, machine control centers, packaging systems, and process control architectures where reliable power delivery is critical for uptime and performance. The 1756-PA75 ensures continuous operation of distributed automation components and supports system scalability in industrial plants, reducing downtime risks caused by power interruptions or failures.

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