The relay card is an electronic module that is used
for the potential-free exchange of signals between a
UPS and a higher-level controller. The user has the
possibility, completely electrically isolated, to
receive signals from the UPS and also to send
com-mands to the UPS.
The output signals are present until the UPS
switches off and is de-energized. In general, if the
UPS is de-energized, all contacts on the relay card
open, regardless of whether they are configured as
openers or closers.