Plug a 120 V power strip in the outlet of the PLUG'n'GROW temperature and humidity controller (iGS-110) and plug the temperature or humidity equipment and the iLS120-OFF sense cord in the power strip. Plug the iLS120-OFF in a 120 V separate circuit and plug a CO2 controller (iGS-061 or iGS-100) in the iLS120-OFF outlet and plug CO2 enrichment device in CO2 controller outlet.
To control 4 humidity and temperature correcting equipments, see the iGS-111