Figure 45 Example Connection To External Display Equipment; Figure 46 Line Termination Options - Raymarine AIS950 Installation Instructions Manual

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 determine 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.
EXT_DISP_IN PILOT_IN DGPS_IN
A B GND A B GND A B
A B GND A B GND A
EXT_DISP_OUT PILOT_OUT DGPS_OUT
EXT_DISP_IN PILOT_IN
A B GND A
A B GND A
EXT_DISP_OUT PILOT_OUT

Figure 45 Example connection to external display equipment

The junction box provides jumpers to select alternative line termination configurations for data input
connections from remote equipment. The line termination options are:
● None - 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.
No line termination

Figure 46 Line termination options

LR_IN SEN1 SEN2 SEN3
GND A B GND A B GND A B GND A B GND
B GND A B GND COM NC NO GND GND GND SM BS COM
LR_OUT ALARM SHIELD SWITCHES
B GND
EXT_DISP_IN A
EXT_DISP_IN B
EXT_DISP_OUT A
EXT_DISP_OUT B
B GND
(default)
Connect shield if required
120 Ohm line
termination (R)
External display system.
Transmit A
Transmit B
Receive A
Receive B
120 Ohm / 1uF line
termination (RC)
Installation
e.g. ECDIS
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