VACON PC00411F 70CMC0390 Fan Control & Auxiliary Power Board

Overview

The VACON PC00411F 70CMC0390 is a fan control and auxiliary power PCB assembly for VACON NXS / NXP series variable frequency drives under Danfoss portfolio. The VACON PC00411F 70CMC0390 supplies regulated auxiliary power and drives cooling fans according to internal temperature feedback from the inverter power unit. The VACON PC00411F 70CMC0390 monitors fan speed, detects fan stall or fault signals and sends status alarms to the main control board. It is a critical spare part for high-power NXS/NXP drives, widely stocked for overhaul and replacement of pump, fan, compressor and crane drive systems. The marking 70CMC0390 is the internal drawing / component identifier for this PCB variant.

Features

The VACON PC00411F 70CMC0390 provides adjustable fan speed control based on heat sink temperature to reduce noise and extend fan service life. The VACON PC00411F 70CMC0390 integrates fan speed feedback circuits and fault detection logic for blocked fan or fan failure. The VACON PC00411F 70CMC0390 generates stabilized auxiliary DC power for internal auxiliary circuits of the drive. It adopts standard connectors and fixed mounting layout matching the original power compartment structure of NXS/NXP inverters. The PCB is built with robust power components suitable for continuous operation under high vibration and temperature cycling conditions. The VACON PC00411F 70CMC0390 supports direct plug‑in replacement for the same part number without modifying wiring or mechanical structure.

Specs

Device Type: Fan Control & Auxiliary Power Board Model: VACON PC00411F 70CMC0390 Brand: VACON (Danfoss) Applicable Series: VACON NXS / NXP high power frequency converter Main Functions: Cooling fan drive, fan fault monitoring, auxiliary power supply Signal Interface: Temperature sensor input, fan tachometer feedback, communication to main control board Mounting: Installed inside inverter power section Operating Temperature: -10°C ~ +70°C Protection Grade: IP20 inside drive cabinet

Principle

The VACON PC00411F 70CMC0390 receives temperature signals from the power module heat sink. It adjusts the output power to the cooling fans to regulate fan speed. The board continuously reads fan speed feedback signals; if the fan stops or runs abnormally, the VACON PC00411F 70CMC0390 triggers a fault alarm and transmits the fault code to the main control board. Meanwhile, it converts the internal bus voltage into stable auxiliary power for supporting peripheral circuits of the drive.

Applications

The VACON PC00411F 70CMC0390 is fitted inside high‑power VACON NXS and NXP frequency converters used for water pumps, ventilation fans, compressors, material handling and crane hoist drives. The VACON PC00411F 70CMC0390 is stocked as spare part for emergency replacement and scheduled overhaul of existing VACON NX drive systems. It also supports drive retrofitting and cooling system maintenance projects.