Whelen PLF46 Programmable Universal Flasher

Whelen PLF46 Flasher The Whelen PLF46 is a compact, fully programmable solid-state flasher for warning lights on emergency, commercial, and utility vehicles. It sits between a simple flasher and a full lighting controller: six independently assignable outputs, four programmable inputs, and configuration through Whelen Command over USB-C. CORE SPECS Voltage: 10–30 VDC Outputs: 6 positive-switching channels, 6 A each, 36 A total Inputs: 4 programmable inputs + ground Sleep current:~200 µA when no outputs are active Temperature: −40 °C to +60 °C Rating: IP67 with the USB-C cap fitted Connectors: right-angle waterproof plugs (outputs, power, inputs) Size: roughly 4.7" × 4.25" × 2.56" (compact vs older SmartLogic flashers) Each output is internally fused at 6 A. Do not fit larger fuses. Typical power per outlet is about 77 W at 12.8 V. WHAT IT CAN DO Programming (via Whelen Command) Connect a USB-C cable (not included) and use Whelen Command to: Assign any flash pattern to any output Group or independently control the six outputs Map the four inputs to patterns, phases, low-power, or custom logic Enable DVI™ (Dynamic Variable Intensity — smoother night dimming / intensity change) Enable Steady-Lock® (hold a steady burn instead of flashing when required) Set low-power / cruise behaviour It ships with a default map so it works out of the box: Input 1 → outputs 1 & 2, SignalAlert 75 phase 1 Input 2 → outputs 3 & 4, SignalAlert 75 phase 2 Input 3 → low power on outputs 1–6 Input 4 → unused by default All of that can be rewritten in software. Retailers typically list 62 Scan-Lock patterns, plus alternating, simultaneous, and synchronized modes. Protection and diagnostics Short-circuit and overcurrent protection per output Thermal protection Status LED: solid green = active, blue = USB traffic, flashing green/yellow = fault / overcurrent Compatibility Works with Whelen LED / Super-LED lightheads and many halogen heads. It is specifically called out as compatible with newer products such as VXE warning lights. Lights are wired as positive-switched; the lamp negative goes to chassis ground. Typical Uses Driving multiple lightheads or small modules (grille, dash, deck, surface-mount LEDs) without adding a full WeCan / Core system. Useful when you need more current and more programmable channels than a basic 2- or 4-outlet flasher, but do not need a networked controller. Practical limits: 6 A per channel is plenty for most modern LED modules, but not for large halogen bars or many high-draw heads on one output. Keep total load within 36 A and size supply wiring accordingly (the install sheet includes a wire-gauge chart). Leave the USB-C cap on for the IP67 seal. UK and International shipping available, contact us for a quote.