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Installation
Page 43
An example of connection to external display equipment is provided in Figure 45, and connections to other
equipment and sensors follow the same scheme. To determin
e the ‘A’ and ‘B’ signal lines on external
equipment use a digital volt meter to measure the signal line voltage referenced to ground. If the voltmeter
shows a negative voltage the ‘A’ signal line is being measured, a positive voltage indicates the ‘B’ signal line.
Figure 45 Example connection to external display equipment
The junction box provides jumpers to select alternative line termination configurations for data input
con
nections from remote equipment. The line termination options are:
Non
e - no line termination, suitable for short cable runs less than 10m (as supplied).
R
- 120 Ohm line termination, suitable for longer cable runs greater than 10m.
RC
- AC 120 Ohm / 1uF termination. Not used.
Select the appropriate line termination option for each data input connection using the jumper adjacent to the data
input connection in the junction box. The jumper positions for each termination option are shown in Figure 46.
Figure 46 Line termination options
AB
EXT_DISP_IN
GND A B
PILOT_IN
GND A B
DGPS_IN
GND A B
LR_IN
GND A B
SEN1
GND A B
SEN2
GND A B
SEN3
GND
AB
EXT_DISP_OUT
GND A B
PILOT_OUT
GND A B
DGPS_OUT
GND A B
LR_OUT
GND COM NC
ALARM
NO GND GND
SHIELD
GND SM BS
SWITCHES
COM
AB
EXT_DISP_IN
GND A B
PILOT_IN
GND
AB
EXT_DISP_OUT
GND A B
PILOT_OUT
GND
Transmit A
External display system.
e.g. ECDIS
Connect shield if required
Transmit B
Receive A
Receive B
EXT_DISP_IN A
EXT_DISP_IN B
EXT_DISP_OUT A
EXT_DISP_OUT B
No line termination
(default)
120 Ohm line
termination (R)
120 Ohm / 1uF line
termination (RC)
www.busse-yachtshop.de | info@busse-yachtshop.de
43


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