POWERSHIELD Internal Relay Card. The Relay Card provides VFC (Volt

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.