The Intelligent Twin Switch Monitor provides the function of two Switch
Monitor units within one enclosure. The two units are electrically
independent of each other. There is a DIL switch on each unit to set the
address.Both Switch Monitor units in the enclosure are designed to monitor the
state of one or more single pole, volt-free contacts connected on a
single pair of cables to report the status. It has a selectable status
reporting delay making it suitable for monitoring flow switches.