SPX SPIDAR NIC-500s, Operation Manual, Page: 23 / 119

Getting Started
15
serial port on the NIC-500 (Figure 3-9). If the systems are daisy-chained, the GPS must be
connected to the Master NIC-500.
Figure 3-9: Connecting cable at GPS end (L) and at NIC-500 end (R)
To connect and utilize a 3
rd
party GPS with the NIC-500, it must meet the following criteria:
•
Be able to communicate over RS232 with a standard 9-pin serial output cable
•
Output a NMEA GGA string in ASCII format, at a rate no faster than 20 Hz
•
Support a baud rate of between 4800 and 115200
•
If it cannot safely accept power via the serial port (as shown below), it must have its own
battery or way of receiving power.
•
GPS must not expect any handshaking from the NIC-500
NOTE : Since the serial port outputs power (current=1A, voltage=12V), it is the responsibility of
the user to confirm with the GPS manufacturer that the serial cable does not provide power to
the GPS or that the GPS will accept 12V power from our serial cable on the pins shown above.
Sensors & Software is not responsible for damage caused to a GPS from using the serial port.
Verify the pins on the drawing below.