Product Description:

The 136H0370 is an AC variable-frequency drive produced by Danfoss and supplied in the VLT FC 102 HVAC Drives series. The unit modulates the speed of three-phase induction motors used in air-handling units, pumps, and chillers, allowing building automation systems to match motor torque to the actual load. By altering output frequency rather than relying on mechanical throttling, the drive reduces energy consumption and lowers operating noise in commercial ventilation and fluid-movement circuits. It integrates neatly into networked controllers common in modern HVAC plants.

Communication and control flexibility is provided by the A-slot option card, the Modbus TCP MCA 122, which enables direct Ethernet linkage to supervisory PLCs or BMS head ends. Supplemental discrete and analog expansion is added through the MCB-109 I/O with RTC backup card, which supports time-stamped logging during power loss. For power intake, the drive is rated for 380–480 VAC and is designed for three-phase power, ensuring balanced current draw across industrial mains. The chassis has an IP20 / Chassis protection level, so it can be installed inside a ventilated control cabinet without additional gasketing or conduit fittings.

Electromagnetic compatibility inside the cabinet is assisted by the built-in RFI filter, which minimizes conducted noise toward other sensitive equipment. Local parameter entry and status visualization are handled by a graphical local control panel, which can be unplugged and relocated to the enclosure door during setup. Mechanical integration remains straightforward because the heat sink profile supports normal cabinet mounting for A, B, and C frames, allowing vertical stacking with other power electronics. The drive uses an uncoated PCB, which suits indoor HVAC environments where condensation is controlled.