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DESCRIPTION
S
Output for connecting loudspeaker of long range speaker unit (pit)
M1
Input for connecting microphone of long range speaker unit (pit)
M2
Input for connecting microphone of long range speaker unit (pit)
—
Negative
AL1
Alarm input
(2)
1
—
Negative
AL1
Alarm input
(2)
1
(1)
:
can be connected to a block
–
, to the block +12 or to an external reference
(2)
:
allows to connect voltage free contact pushbuttons (NO or NC) or powered pushbuttons
(3)
:
allows to connect voltage free contact (NO or NC)