Secure now: Allen-Bradley 1769-PA4 High-Output AC Power Supply
Atlantechdrives provides you the 1769-PA4, the high-capacity AC power supply variant for the 1769 Compact I/O platform. This module is specifically designed for high-density racks and expansion banks that exceed the power limits of the standard PA2, providing doubled current capacity for the 5V DC backplane rail.
- Input Voltage: 85-265V AC / 170-265V AC (Selectable)
- Output Current: 4.0A @ 5V DC and 2.0A @ 24V DC
- Power Consumption: 200 VA
- Current Limit: Internal Fuse Protected
- Inrush Current: 25A maximum
- Operating Temp: 0°C to 60°C
Technical Superiority: Expanded Energy for High-Density I/O
Order now the 1769-PA4 to handle the energy demands of high-performance automation systems. The 1769-PA4 is engineered with a powerful internal transformer and switching regulator that provides 4.0 Amps on the 5V DC rail. This is vital for modern racks populated with high-density modules like the 1769-OB32 or 1769-IF16, which draw significantly more backplane current than legacy components. The «PA4» ensures that voltage levels remain within strict tolerances, preventing «Low Bus Voltage» faults that can cause intermittent communication drops or logic errors. When you procure the 1769-PA4, you are gaining a robust power foundation capable of supporting up to 8 high-current modules in a single local or expansion bank.
Expert Tips: Optimizing Expansion Banks
When designing a system with the 1769-PA4, remember that it is often required for the second or third bank in a multi-rack system. Since expansion cables (1769-CRR/CRL) do not carry enough current to power remote modules, each bank needs its own PA4. Always use 14 AWG copper wire for the L1 and L2/N connections to ensure the inrush current does not cause a local voltage dip. Sourcing your 1769-PA4 from Atlantechdrives ensures you get a unit with high-grade internal capacitors capable of sustaining the 4.0A load during peak industrial temperatures.
Maintenance and Signal Reliability
Maintenance for the 1769-PA4 involves monitoring the «Power» LED. If it flickers or turns off, check for a short circuit on the I/O modules. The 1769-PA4 generates more heat than the PA2; ensure the cabinet has active ventilation if multiple PA4 units are in use. Sourcing an authentic 1769-PA4 from Atlantechdrives provides the hardware reliability and deterministic performance required for mission-critical industrial automation.
FAQs
Q: What is the benefit of the 1769-PA4 over the PA2?
A: The PA4 provides 4A on the 5V rail, whereas the PA2 provides only 2A. It is necessary for large or high-density racks.
Q: Can I change the voltage from 120V to 240V?
A: Yes, there is a physical slide switch on the module to select the appropriate input range.
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