LED Function
LED 6 Writing to Flash
ON: system is writing to flash memory
OFF: system is not writing to flash memory
LED 7 Heartbeat
FLASHING: system is functioning normally
ON OFF FLASHING
23.3 Powering expanders from the auxiliary power terminals
To calculate the number of expanders/keypads that can safely be powered from the auxiliary 12V DC
power terminals, add the total maximum current draw from all of the expanders/keypads to be powered
and determine if this total is less than the specified 12V DC auxiliary power.
See the technical data for the specific auxiliary current and the corresponding installation
instruction or data sheet of modules, keypads and expanders for current consumption.
Ex
p
an
de
r
1
C
u
r
r
en
t
(
mA)
+
Ex
pa
nd
e
r
2
C
ur
re
n
t
(
mA)
+
…
.
.
<Auxiliar
y
Power
If the electronic or relay outputs are already powering external devices, the power supplied to these
devices must be subtracted from the 12V DC auxiliary power supply to determine the amount of
available power from the auxiliary power terminals (0V 12V).
If the total maximum current draw from the expanders exceeds the auxiliary power, a PSU expander
should be used to provide additional power.
SPC4xxx/5xxx/6xxx – Installation & Configuration Manual Appendix
© Vanderbilt 2018 363 A6V10276959-d
11.2018
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