Intelligence remote and local control, RS485 communication with MODBUS RTU or Lonworks protocol, digital signal output, ... : 350WC. Variable Speed: 0~1900rpm by PWM and 0-10VDCD.RS485 communication by MODBUS RTU and Lonwork protocol by LISA software ... foods.FFU EFU Fan Filter Unit BLDC Fan controller pictures RS485 remote control FFU EC fan controller with failure alarm