Installation guide

Controller Installation
15
Step 6. Use of an Optional UPS
If the server is
NOT
connected to an uninterruptable power supply (UPS) and you
want to maintain communication with the controller during power failures,
connect the modem and external power supply ac cords to a UPS.
By connecting the modem and the external power suppply to a UPS, you have
ensured that even if building power should fail you will be able to communicate
with the controller and the server, and that full alerting and event logging
continues until the battery is drained or power is restored.