IES Series User Manual V. 2.0
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2.1.2 Relay option
Additionally, a dry contact relay connection is available. In the event of a power supply failure, you can attach
an audible or visual alarm such as a Klaxon to the relay to alert plant personnel a power supply has failed.
This feature works with a single or dual power supply configuration. See Figure 2-4.
Fig. 2-4
To connect power to the switch first make sure the AC/DC power supply is NOT connected to an AC power
outlet. Connect the + and – conductors from the AC/DC power supply to the V1+ and V1- terminals
respectively. If a redundant DC power configuration is to be used connect the second set of conductors to
V2+ and V2- respectively.
Grounding
Be sure to properly ground the IES switch. Failure to properly ground the switch may result in damage or
destruction of the switch or attached devices.
