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Inputs and outputs
RT3000s and RT4000s have one main connector for their inputs and outputs (label 6 on
Figure 5, page 34). The J1 connector of the 14C0038B user cable connects to this and
connectors J2–J7 provide connections for the inputs and outputs. See the user cable
drawing located at the back of this manual for more details on the connectors and pin
assignments. The main connector is keyed so the user cable must be correctly aligned for
it to connect.
All connections to RT2000s are marked on the front panel, shown in Figure 4 on page
33. The pin outs are the same as the equivalent connectors J2–J7 on the 14C0038B user
cable. See the user cable drawing located at the back of this manual for more details on
the connectors and pin assignments.
The system can output data on the serial port over Ethernet and over CAN bus. The
standard serial output of the RT is a proprietary binary format, referred to as NCOM.
OxTS offers C and C++ code that will interpret the packet. This can be used freely in
users’ programs to interpret the output of the RT. More information about NCOM can
be found in the NCOM description manual.
It is also possible to output a standard NMEA string from the RT to mimic the output of
standard GNSS receivers.
OxTS offers a service to tailor the serial output format to the customer’s specification.
Contact Oxford Technical Solutions for details of this service
Digital inputs and outputs
Table 29 describes each of the signals on the digital I/O connector. A more detailed
explanation of each signal can be found below.
Table 29. Digital I/O signals
Pin Function Description
1 Digital 1 1PPS output from GNSS receiver
2 Digital 2 Event input
3 Digital 3 Wheel speed input (from tachometer on a single wheel)
4 Digital 4 Wheel speed output simulation
5 Digital 5 IMU sync output pulse (100 or 250 Hz)
6 Digital Ground Digital ground
7 Digital Ground Digital ground
8 Digital Ground Digital ground
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