The TrolMaster DCC-2 can connect up to two controllers, providing a simple solution for controlling a single device with multiple conditions. For example, if an exhaust fan is assigned for climate control by the Hydro-X system, the DCC-2 enables the same exhaust fan to also be addressed to Carbon-X for emergency CO2 exhaust purposes.

The DCC-2 is designed to be used in combination with one of TrolMaster's plug-in style modules. (DSC-1, DSH-1/2, DST-1/2 , DSP-1, DSD-1, DSV-1). Once connected to the plug-in module using the RJ12 cable built into the DCC-2, the DCC-2 will act in concert with that plug-in module to both 2 controllers, whatever device is connected to the plug-in module.