SplitBox
– User Manual
SPLITBOXUM.1.2
7.1.4. Port B, C
These full duplex serial ports can be individual configured in RS-232 or RS-422 mode through configuration
switches.
Pin #
RS-232
RS-422
Direction Description
1
Sync In
Sync In
In
Sync In Signal (GPS PPS for example)
2
Rx
Rx+
In
3
Tx
Tx-
Out
5
GND
GND
Ground return
6
NA
Rx-
In
7
NA
Tx+
Out
7.1.5. Port D
7.1.5.1. SplitBox without integrated GNSS
Input only serial port that can be configured in RS-232 or RS-422 mode through configuration switches.
Pin #
RS-232
RS-422
Direction Description
1
Sync In
Sync In
In
Sync In Signal (GPS PPS for example)
2
Rx
Rx+
In
4
PWR
PWR
Out
+12V output to provide power to a third party equipment such as a radio
modem (selectable via configuration switch)
5
GND
GND
Ground return
6
NA
Rx-
In
7.1.5.2. SplitBox with GNSS (RTCM input / GPS configuration)
Special serial port used to input RTCM corrections or to get a direct full duplex connection to the internal
GNSS receiver. It can be configured in RS-232 or RS-422 mode through configuration switches.
Pin #
RS-232
RS-422
Direction Description
2
Rx
Rx+
In
Connected to the internal GNSS COM1 or COM3 port (selectable via
configuration switch)
3
Tx
Tx-
Out
Directly connected to the internal GNSS COM1 port
4
PWR
PWR
Out
+12V output to provide power to a third party equipment such as a radio
modem (selectable via configuration switch)
5
GND
GND
Ground return
6
NA
Rx-
In
Connected to the internal GNSS COM1 or COM3 port (selectable via
configuration switch) - RS-422 only
7
NA
Tx+
Out
Directly connected to the internal GNSS COM1 port - RS-422 only
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