TrolMaster Programmable Dry Contact to Control Normally on/off Items -Temp RH Co2 or Recycle

The Trolmaster DSD-1 Dry-contact module provides a simple and flexible solution to who want to connect & control devices to the Hydro-X using a “dry-contact” or relay to activate the device. Some equipment requires either normally open or normally closed contact closure in order to activate the equipment. The DSD-1 is the product that you need to control those types of devices. *