(DSD-1) Dry Contact Station for Hydro-X systemOverview The Trolmaster DSD 1 Dry contact module provides a simple and flexible solution to the users 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. It can be configured to work as the other Trolmaster
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