Application Scenarios
In a typical automotive assembly line control panel, the 1756-PA72K serves as the primary power source for a rack containing a 1756-L6x controller and multiple I/O modules. The wide input voltage range (85-265V AC) allows the same module to be deployed in plants with unstable line voltages or different regional standards (e.g., 120V or 230V AC mains) without requiring a separate external transformer. Its conformal coating provides an extra layer of defense against conductive dust and humidity commonly found in manufacturing environments, reducing the risk of arc faults and unplanned downtime due to power supply failure.
Parameter
| Main Parameters | Value/Description |
|---|---|
| Product Model | 1756-PA72K |
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Product Category | ControlLogix AC Power Supply Module |
| Input Voltage | 85 – 265 V AC (47 – 63 Hz) |
| Output Power | 75 W continuous (at 60°C) |
| DC Output Rails | +5.1V @ 10A, +3.3V @ 4A, +1.2V @ 1.5A, +24V @ 2.8A |
| Inrush Current | 20 A maximum |
| Hold-up Time | 5-6 cycles (typical) |
| Operating Temp | 0°C to +60°C (32°F to 140°F) |
| Mounting | Left-side of 1756-A series chassis (e.g., A4, A7, A10, A13, A17) |
| Protection | Conformal Coated (K-series) for harsh environments |
| Weight | Approx. 0.95 kg (2.1 lb) |
Technical Principles and Innovative Values
Innovation Point 1: Universal Input with High ImmunityUnlike older supplies that required hardware jumpers for 120V/240V selection, the 1756-PA72K employs auto-sensing circuitry across 85-265V AC. This design eliminates a common installation error and ensures continuous operation during brownout conditions or voltage sags, which is critical for process integrity in industries like chemical or water treatment.
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