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How to Activate FLTCON Up/Down from a Thermostat or Sensor

This article explains how to activate the up/down buttons on FLTCON-controlled actuators using a thermostat or temperature sensor by replacing or emulating the FLT remote with a relay or microcontroller-based interface.

How it works

  • The FLTCON system’s remote sends commands to the control box using four signal lines that represent functions such as "UP", "DOWN", Presets 1–4, and "M".
  • To operate the system from a temperature sensor, the sensor (or a controller reading the sensor) must act like the remote by closing the appropriate signal line(s) — effectively acting as a relay to send the UP or DOWN commands.

Required approach

  • Use a microcontroller or smart relays in place of the FLT remote to emulate the remote’s signaling.
  • Have the temperature sensor drive the microcontroller or the smart relay logic so that when a temperature threshold is reached the system activates the UP or DOWN signal line.

Practical steps

  1. Identify the four signal input lines on the FLTCON control box that the FLT remote uses for commands (these correspond to UP, DOWN, Presets 1–4, and M).
  2. Choose an interface method:
    • Microcontroller: Use a microcontroller to read the temperature sensor and switch the appropriate signal line(s) to emulate remote button presses.
    • Smart relays: Use smart relay modules configured so the temperature sensor or a temperature-controlled switch can trigger the relay that ties into the control lines.
  3. Program or configure the controller/relays:
    • Define the temperature thresholds that should trigger UP and DOWN actions.
    • Configure the controller to close the corresponding signal line briefly or for the required duration to mimic a button press.
  4. Connect the controller/relays to the FLTCON signal lines so that when the controller closes a line it sends the intended command to the control box.
  5. Test operation carefully by raising and lowering the temperature (or simulating thresholds) and confirming the FLTCON responds with UP and DOWN actions.

Reference

  • For additional details on integrating FLTCON control boxes with home automation and alternate controllers, consult the FLTCON-to-home-automation compatibility resource at: https://www.progressiveautomations.com/blogs/how-to/fltcon-control-box-to-home-automation-compatibility