ComNav G2 & G2B Installation & Operation Appendices
Document PN 29010093 V1.5 - 71 -
16 December 2016
Appendix 5
Retrofit G2/G2B to Vector G2/G2B
G2/G2B uses a better shielded cable than ComNav’s previous Vector G2/G2B system. It is
recommended you always change your cable when you replace a Vector G2/G2B by a
G2/G2B.
However there are circumstances when re-cabling is impossible or too costly that you just
have to use your old Vector cable for the new G2/G2B. In such cases, you may use a G2
cable converter (Part Number 31220020) to connect the G2/G2B and the Vector cable. Note
your Vector cable must have a part number 051-0157-002 or 0510158-001.
There are several limitations if you choose to use the Vector cable with this converter:
1. The converter can only be used in flush mount, not pole mount. You will get a new
mounting gasket different from the G2 standard one.
2. You don’t have access to the NMEA 2000 port when you use the Vector cable
3. The color code of the vector cable changes slightly after using this converter. You
have to rewire your devices based on Table 25.
Vector B2/G2B cable Supports New ComNav G serial Compass With the
Convertor Cable
Vector Cable 051-0157-002, 0510158-001
G Serial Signal Description
Red Power (+)
Black Power (-)
Blue Port 1 Tx RS232
Black/Blue Port 1 Rx RS232
Brown Port 2 Rx RS422 A
Black/Brown Port 2 Rx RS422 B
Yellow Port 2 Tx RS422 A
Black/Yllow Port 2 Tx RS422 B
Green 1PPS+ / Port 3 Tx RS422 A
Shared wires
Black/Green 1PPS- / Port 3 Tx RS422 B
CAN_L
NC
CAN_H
Orange NET_S
Not to use
Black/Orange
NET_C
White Alarm 1
White/Red Alarm 2
Gray Port1 GND RS232
Drain
Note
has to reconnect external devices
support the new ComNav G serial compass when keep using
Vector cable with the cable convertor. .
Table 25 - Vector G2/G2B color code when used with G series G2/G2B
If you encounter any EMC problem after using the Vector cable, it is suggested you replace it
with the new G2/G2B cable.
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