Installation manual

Using 12V Supplementary Supplies
Larger installations that place additional current demands will require
the installation of one or more supplementary power supplies. As a
guide, if the normal standby (quiescent) current of the system is
greater than 850mA, then an additional 12V DC power supply should be
installed. Ensure that the 0V ground of Comfort Main Auxiliary is
connected to the 0V of all supplementary 12V Power supplies. +12V
should NOT be commoned.
Devices Powered from Panel
Devices Powered from Power Supply
12V
OP1
Negative
Outputs
12V
S12V
KB
KA
COM
COMFORT
MAIN PCB
Relay
Board
Keypad 1
C B A
VC MIC KA KB 12V COM
TAMP ZONE 12V COM 12V COM
Supplementary
12V Power Supply
TAMP ZONE 12V COM
OP2
COM
NC
NO
Negative trigger
from Output 1
operates the relay
board.
Detector Detector
IMPORTANT
The 0V line MUST be commoned
between the Comfort Panel and the
supplementary power supply.
The +12V from Comfort MUST NOT be
connected to the positive of the
supplementary power supply or any
devices it is supplying.
12V
COM
Figure 2.18 Connecting a 12V Supplementary Supply
Comfort Installation Manual
47