Furuno FS-1570 Installation Manual page 29

External BK
Terminal No. Signal name
17
18 BK GND
19 Tx_KEY
20 Rx_MUTE
21 SHIELD
Note: When GND line from other radiotelephone is connected to the chassis, float the
ground.
FS-1570/2570
T-IF Board
(05P0731) TB5
BK GND
Function
BK (+) Output voltage: 24 VDC
GND
Go to GND on transmitting.
Receiver unit goes to off when
this line is GND.
+
External
-
Battery
BK (+) 17
19
TX KEY
20
18
Example of connection with receiver
T-IF Board (05P0731)
24V TB1
TB2
BK GND
Power of BK
E
Object
Power of relay BK for
other radiotelephone
0 V
BK control
radiotelephone
BK control from other
transceiver unit
BK (+)
Receiver
Relay
for other
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