9
Installation
RT4722
2.5
Loudspeaker Connection
When one or more control units are connected to the VHF system, two of them can be set up to use the transceiver’s
two loudspeaker outputs to drive external speakers.
To link a loudspeaker to a control unit, enter the function menu and select external speaker:
Path: Func\general\sound\loudspeak\norm\alarm\extspk, and set external speaker to be 1 or 2 as desired.
The loudspeaker signals are available in the SPARC-bus cabling, and a loudspeaker can be connected to the system
in the handset hook parts or in the connection box.
Connect the loudspeaker cables to SPARC-bus signals (LS_1+ and LS_1-) or (LS_2+ and LS_2-) depending on which
speaker selection is made by the control unit(s).
2.6
Connectors
Handset Hook
SPARC-Bus Connection Box H4991
35348
_ON
Term. ON
VDC
+12
LS_1-
LS_1+
LS_2+
LS_2-
-BAT
AF-
AF+
_AF-
RX
-BAT
_AF+
RX
SPARC+
_ON
SUPPLY
VDC
+12
RX_AF-
RX_AF+
+12VDC
-BAT
AF+
-BAT
AF-
SPARC-
LS_2+
LS_2-
_1+
LS
_1-
LS
SUPPLY
HOOK Connection 32262
SPARC+
SPARC-
+12VDC
X2
5
1
2
3
4
13
14
15
X3
6
7
8
10
11
9
S3
10
11
12
6
7
X1
8
9
R3
R2
R4
15
12
13
14
S1
R1
V1
V2
S2
3
4
5
1
2
35349A
_ON
SUPPLY
SPARC+
LS_1+
SPARC-
AF+
+12VDC
AF-
RX_AF-
RX_AF+
+12VDC
-BAT
LS_2-
-BAT
LS_2+
LS_1-
3
X1
3
13
13
15
14
15
14
11
12
10
11
12
10
X2
9
8
7
X3
9
8
7
6
5
4
6
5
4
2
1
2
1
In the handset hook the shield of the SPARC-bus cable is connected to the cable relief.
WARNING:
Be carefull not to cover the distress switch with installation wires.
9945
Содержание RT4722
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