POWERSHIELD Internal Relay Card. The Relay Card provides VFC (Volt Free Contact) relays that change state upon UPS events.

The Relay (AS400) card provides VFC – (Volt Free Contact) relays that change state upon UPS events. This type of card is often used when current loop communications are required for devices such as BMS – Building Management Systems, Access Control Alarm Panels or Industrial PLCs. The events that can be detected are, Mains Failure & Restore, Battery Normal or Low, UPS Normal or Bypass, UPS Summary Alarm.