Product Description:

The 135N1756 is a variable frequency drive manufactured by Danfoss and supplied as part of the VLT FC 280 Midi Drives series. Designed for panel mounting in small- and medium-scale machinery, the unit converts fixed mains power into a regulated output that allows precise speed and torque control of three-phase induction motors used in pumps, fans, and light material-handling stations. By modulating the output frequency, it removes the need for mechanical throttling, reduces energy consumption, and supports integration with programmable controllers in automated production lines.

Rated at 0.75 kW, the inverter can continuously supply the electrical power needed for motors up to 1.0 HP. It operates from a three-phase 380–480 VAC supply, which matches common 60 Hz plant networks without requiring a transformer. To dissipate regenerated energy during rapid stops, it includes an internal brake chopper that prevents DC-link overvoltage when overhauling loads return energy to the drive. Conducted emissions are limited by a factory-installed EMC Category C3 (200/400 V) filter, which supports compliance in installations with long motor cables. The drive has no mains options, so line conductors connect directly to the built-in terminals without additional harmonic mitigation modules.

The control layer is provided by a standard control card with Modbus, allowing a two-wire RS-485 network to carry run commands, speed references, and diagnostic data instead of relying entirely on discrete wiring. The circuit boards have a protective coating that shields sensitive traces from humidity and airborne contaminants encountered in HVAC systems or washdown areas. The drive includes no Adaptation A or Adaptation B options, leaving it in the default factory configuration for setup through the keypad, parameter files, application macros, or the fieldbus connection.