1.0 IntroductionThe Alarm Relay Board (ARB) is used to provide external annunciation of controller enclosure and peripheral enclosure tamper events; either an opened enclosure cover or for an enclosure that has been removed from its mounting location ...
1.0 Purpose Keri controllers are designed with built-in voltage transient suppression. The controller ship kit also provides external transorbs that Keri highly recommends installing. For most applications, this level of protection is more than ...