Overview
The Allen-Bradley 1756-PA75 is a ControlLogix power supply module designed to provide reliable DC power distribution to 1756 chassis backplanes. With an input voltage range of 85 to 265 VAC and a nominal input voltage of 120/240 VAC, the 1756-PA75 delivers a maximum output power of 75 W at temperatures up to 60 °C (140 °F). This power supply is widely deployed in industrial control systems where robust, regulated multi-voltage DC power is essential.
Key Features
- Operates within a frequency range of 47 to 63 Hz for global grid compatibility
- Hold-up time of 6 cycles at 120 VAC and 60 Hz, ensuring continued operation during brief power interruptions
- Reinforced insulation with a continuous isolation voltage of 250 V for electrical safety
- Output current ratings of 4A at 3.3VDC; 13 A at 5.1VDC and 2.8 A at 24VDC
- Chassis-mount design with integral DIN-profile form factor
- Status LEDs for visual operating status
Technical Specifications
- Input Voltage: 85 to 265 VAC
- Input Frequency: 47 to 63 Hz
- Input Power: Maximum input power of 100 VA
- Output Power: 75 W @ 0…+60 °C (+32…+140 °F)
- 5V Output: 13 A at 5.1VDC
- 3.3V Output: 4A at 3.3VDC
- 24V Output: 2.8 A at 24VDC
- 1.2V Output: 1.5 amps at 1.2 volts DC
- Inrush Current: 30 amps maximum, providing adequate support for devices that require transient power surges
- Isolation Voltage: 250 volts (continuous)
- Hold-Up Time: 2 cycles at 85 volts AC at 60 Hz, extending to 6 cycles at 120 volts AC and 20 cycles when operating at 220 volts AC
- Operating Temperature: 0 To 60 degrees C
- Dimensions: 14.0 x 11.2 x 14.5 cm (5.51 x 4.41 x 5.71 in.)
- Weight: Approximately 0.95 kg (2.10 lb)
Typical Applications
The 1756-PA75 power supply is used in a wide range of industrial automation and control applications, including:
- ControlLogix controller systems requiring multi-voltage DC power distribution
- Process control systems with power supply redundancy requirements
- Machine automation and motion control platforms
- Remote I/O installations where power reliability is critical
- Food, beverage, pharmaceutical, and other process manufacturing environments
Compatibility & Replacements
Compatible With
- 1756-A4, 1756-A7, 1756-A10, 1756-A13, 1756-A17 chassis
- ControlLogix Series B and Series C platforms
- ControlLogix processors (1756-L5x, 1756-L6x, 1756-L7x, 1756-L8x series)
- Studio 5000 engineering software environment
- EtherNet/IP and standard ControlLogix networks
Replaces / Drop-In Replacement For
The 1756-PA75 is a direct replacement for earlier ControlLogix power supplies when paired with compatible chassis. Related catalog numbers include 1756-PA72, 1756-PB72, 1756-PB75, 1756-PC75, 1756-PH75, though each has different input voltage or redundancy configurations. Verify your chassis type before ordering.
Works With
- Rockwell Studio 5000 software suite
- RSLogix 5000 development environment
- ControlLogix backplane architecture
- Integrated Ethernet modules within the chassis
- Standard 24 VDC field wiring and sensor networks
