TDC-BH-U - Duct Mounted


Humidistat, duct mounted, binary humidifying or dehumidifying with optional fan support

The TDC-BH is a stand-alone electronic binary humidity stat for duct mounting. It features one internal humidity sensor, one external NTC temperture sensor input and two binary outputs (relays).

A detailed parameterization is possible with the use of a simple configuration routine. The TDC-BH can be configured using the standard operation terminal. No special tools or software is required. 



  • Humidifiers:
    ON/OFF type humidifiers
    ON/OFF type humidifiers with single speed fan support             
  • Dehumidifiers:
    ON/OFF type dehumidifiers
    ON/OFF type dehumidifiers with single speed fan support
  • Combination humidifiers and dehumidifiers without fan support


  • Control for binary humidifiers and dehumidifiers with or without fan support
  • Low power energy consumption
  • Relay switching for outputs each up to 300 W
  • Cost saving option with Economy functionality and set point limitations
  • External sensor input for set point set back based on outdoor temperature
  • Password protected programmable user and control parameters
    - set point range limitation
    - access control for set points and mode change
    - access control for clock and time programs
    - select your display contents
    - selectable behavior after return from power failure
  • Temperature display of external input in Celsius or Fahrenheit

Deluxe version

  • Clock and time schedule function
  • Blue blacklight for LCD


   Item name    Item code   Option    Description
   TDC-BH-U-W20   40-100059-20   Standard

  Binary controller with
  1 internal humidity input
  1 external temperature input (for set point shift)
  1 DO (relay) for humidifier or dehumidifier
  1 DO (relay) for fan (optional)
  -U = Conduit connector NPT 1/2
  -W20 = US units/time pre-configured
  -W24 = Humidifying, US units/time pre-configured
  -W25 = De-humidifying, US units/time pre-configured
  -D = 7 day programmable

   TDC-BH-U-W24   40-100059-24   Humidifying
   TDC-BH-U-W25   40-100059-25   Dehumidifying
   TDC-BH-U-D-W20   40-100060-20   Deluxe
   TDC-BH-U-D-W24   40-100060-24   Deluxe
   TDC-BH-U-D-W25   40-100060-25   Deluxe


AES3-HT / AES4-HT - Humidity/Temperature Sensor
For indoor, outdoor and duct transmitters and PI-universal controls
AMS-1 - Wheather Shield
For outdoor or duct transmitters
SOD-Tn10 - Outdoor
Passive temperature sensor for outdoor mounting with cable gland for Vector Controls NTC-type inputs
SDB-Tn10 - Duct Mounted
Passive temperature sensor for duct mounting with cable gland for Vector Controls NTC-type inputs
S-Tn10 - Flying Lead
Passive temperature sensor with flying lead for Vector Controls NTC-type inputs
SD-Tn10 - Flying Lead Duct
Passive temperature sensor for duct mounting for Vector Controls NTC-type inputs


Operation Manual

Install Sheet

Application Notes