No. Item
Description
7
Tap-off open circuit
monitor selection
(X402)
–
Jumper to select the tap-off end-of-line open circuit
supervision.
8
Tap-off short circuit
monitor selection
(X401)
–
Jumper to select the tap-off end-of-line short circuit
supervision.
9
(X1) 100 volt loop
connection
–
2-pin removable screw connector (pin designation from left to
right):
–
Loop connection X1+
–
Loop connection X1-
10 (X2) 100 volt loop
connection
–
2-pin removable screw connector (pin designation from left to
right):
–
Loop connection X2+
–
Loop connection X2-
11 (X3) 100 volt
loudspeaker tap-off
connection
–
2-pin removable screw connector (pin designation from left to
right):
–
Tap-off connection to loudspeaker(s) X3+
–
Tap-off connection to loudspeaker(s) X3-
!
Warning!
If there is a short/overload on the Isolator Board, the power resistors can get hot.
Loudspeakers Line Isolator System
Connections indicators and controls | en
37
Bosch Security Systems B.V.
Installation and Operation Manual
2014.03 | V1.1 |