GMS-GPS User Manual
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02.09.2022 / V3
4.2.3. SCAI or NAIR Device
4.2.3.1. Mating Connector at the Instrument Side for RS-232 connection
Table 6. Electrical connections of
an Instrument’s GPS device input connector
Pin
Signal
Standard Cable Colours
Comment
1
G
Green
1 PPS signal from GPS
2
GPS_1PPS-
N/A
Not connected
3
TX+
Brown
Transmit signal of GPS
4
TX-
N/A
Not connected
5
RX+
White
Reception signal from instrument
6
RX-
N/A
Not connected
7
Yellow
12V power from instrument
8
SUPPLY-
Grey
Ground from instrument
Figure 15. RS-232
scai / nair
connector
Figure 16. Connector pin out
4.2.3.2. Mating Connector at the Instrument Side for RS-485 connection
Table 7. Electrical connections of
an Instrument’s GPS device input connector
Pin
Signal
Standard Cable Colours
Comment
1
G
Grey
1 PPS signal from GPS
2
GPS_1PPS-
Pink
Not connected
3
TX+
Green
Transmit signal of GPS
4
TX-
Yellow
Not connected
5
RX+
White
Reception signal from instrument
6
RX-
Brown
Not connected
7
Red
12V power from instrument
8
SUPPLY-
Blue
Ground from instrument
Figure 17. RS-485
scai / nair
connector
Figure 18. Connector pin out
Summary of Contents for GMS-GPS
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