Em-Trak A100 - Figure 45 Example Connection to External Display Equipment; Figure 46 Connecting Data Interface Cable Shields

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 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.
Figure 45 Example connection to external display equipment
Shielded cable should be used for data interface connections and the shield should be connected to the ground
at the 'talker' end of the connection. If the transceiver is being connected to a display system then the cable
shield should be connected to ground at the transceiver junction box as shown in
Figure 46.
Figure 46 Connecting data interface cable shields
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
A+ B-
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
A+ B-
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
BS SM
SWITCHES
GND
Connect cable shield to GND terminal
Do not connect shield at this end