8
D
OUBLE
-S
ECURE
P
OWER
I
NPUT
F
AULT
A
LARM
The power inputs are designed as a "
common
negative
", which implies that the negative
input is connected, but "
double-secure
" is
supported to prevent the unnotified failure of
power from one of the negative inputs. Should
one of the negative power inputs fail, the
system will detect the failure.
NOTE:
the
system will trigger an event occurrence only if
the user has set the fault alarm or event log
for power.
