GNSS Compass Reference Manual
Page 28 of 85
Version 1.1
13/01/2021
Colour
Function
Primary
Secondary
CAN
1PPS Power
Red
Power Supply
Tip
Black
Power Ground
Ring
Green
Primary RS422 Tx(+) /
RS232 Tx
2
Green/White
Primary RS422 Tx(-)
8
Purple
Primary RS422 Rx(+) /
RS232 Rx
3
Purple/White
Primary RS422 Rx(-)
7
Brown
Secondary RS422 Tx(+) /
RS232 Tx
2
Brown/White
Secondary RS422 Tx(-)
8
Pink
Secondary RS422 Rx(+) /
RS232 Rx
3
Pink/White
Secondary RS422 Rx(-)
7
Grey
Signal Ground
5
5
White
CAN Hi
7
Blue
CAN Lo
2
Orange
Alarm Hi
9
Orange/White
Alarm Lo
1
Yellow
1PPS Out
2
Grey/White
Signal Ground
6
5
Bare
Drain Wire
Ring
Table 17: Serial breakout cable pin allocation table
See Table 18 to match wire colour to pin number of the Holin connector.
7.11
Unterminated Serial Cable
The unterminated serial cable is only compatible with GNSS Compass part numbers GC-SER-LC
and GC-SER-HA. It has part number GC-SER-CABLE-20M.
Connection to the GNSS Compass is made through a Holin C-Size 18 pin connector. The Holin
part number is CCN-L218SM. The connector has a bayonet lock and provides a reliable and
rugged connection to GNSS Compass under demanding conditions. It is rated to IP68 in the mated
state. The cable assembly is supplied with 20 metres of unterminated UV stable shielded cable.
Each individual wire is colour coded 26AWG wire.
This cable is intended only for customers with experience in terminating shielded cable.
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