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‧Input power: AC24V±10%, single phase 50/60Hz.
‧P、PI、PID control logic
‧Unit seletion: Temp ℃、Temp ℉, Humidity %, Number
‧Communication Form: Modbus-RTU
‧Communication Interface:RS- 485 
‧Wire Specification: 2C UL2464/24AWG communication isloated wire.
‧Removable control panel, maximun distance 30m (With addition power supply to extend the distance to 1200m maximun)
‧Failure, alrem and protection status input
‧Series connection of DEI-6688N is feasible.
‧Input/ Output:
  UI (Universal input) - 6sets: DC 0V~10V, DC 4mA~20mA, Ni1000 (Temp), Pt1000(Temp),
  LG-Ni1000(Temp), NO/NC, button swithch.
  AO (Analog output) - 6sets: DC0V~10V, DC 4mA~20mA.
  DI (Digital input) - 8sets: NO/NC Button switch.
  DO (Digital output) - 8sets: Relay 3A/250VAC, NO/NC.