V103/113 Vector User Guide Chapter 2-Installation Page 16 of 35
Ports
The V103/113 offers either serial port or NMEA 2000 port functionality.
Serial Ports
The V103/113 has three ports (Port A, Port B, and Port C), where:
Port A can be both full-duplex RS-232 and half-duplex RS-422 (transmit only)
Port B is full-duplex RS-422
Port C is for NMEA 2000 and only available via serial-to-NMEA 2000adapter
You can receive external differential corrections via either Port A (full-duplex RS-232) or Port B (full- duplex
RS-422). You can connect up to three devices at one time using two ports. One device can receive data via
Port A (RS-422 transmit only) while two devices can transmit and receive data via Ports A and B (one
connected to Port A RS- 232 and one connected to Port B).
Note: Port A (RS-422) or Port B is required for communicating to an IMO-approved device.
You can update firmware via Port A (RS-232) or Port B.
Note: The V103/113 has maximum baud rate of 115200.
Serial Port Configuration
You may configure Port A or Port B of the GNSS receiver to output any combination of data. Port A can have a
different configuration from Port B in terms of data message output, data rates, and the baud rate of the port.
This allows you to configure the ports independently based upon your needs.
For example, if you want one generalized port and one heading-only port, you can configure the ports as
follows:
Port A to have GPGGA, GPVTG, GPGSV, GPZDA, and GPHDT all output at 1 Hz over a 9600 baud
rate.
Port B for GPHDT and GPROT message output at their maximum rate of20 Hz over a 19200 baud
rate.
The messages you configure each port to output and the rate of the port will be the same for both RS-232 and
RS-422 interface levels. For example, the RS-232 Port A and RS-422 Port A output the same data messages
at the same baud rate. If the baud rate or messages for the RS-422 port need to be changed, this needs to be
commanded through the RS-232 port.
Both RS-232 and RS-422 output signals may be used simultaneously.
Note: For successful communications use the 8-N-1 protocol and set the baud rate of the V103/113’s serial
ports to match that of the devices to which they are connected. Flow control is not supported.
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