VBOX III User Guide
Page 12 of 30
15/07/2011
CAN / RS232 Ports
The VBOX III is equipped with 2 CAN Bus interfaces and 2 RS232 serial ports. The primary RS232 port is used for all communication between the VBOX and
laptop PC. The primary port is marked
RS232
on the VBOX III front panel. The primary RS232 port is able to transmit live data from the VBOX to the PC for
viewing and performing real-time tests. It is important to note however that due to limitations of the PC serial port, live data transfer is limited to 20Hz.
Therefore for maximum accuracy, tests performed at a GPS sample rate above 20Hz should be logged to compact flash and post processed.
The secondary RS232 port is used for connection to a Telemetry Radio module allowing the reception of Differential GPS (DGPS) data for local correction
from a Racelogic Local DGPS basestation. The secondary RS232 port is located in the connector marked CAN on the VBOX III front panel.
The CAN Bus ports A and B are lo
cated in the VBOX III connectors “CAN” and “RS232” respectively. The function of these ports is configurable by the user
for use by either Racelogic external modules or the users own CAN Bus equipment. For dual use of RS232 and CAN from one of the sockets you will require
a 5Way Lemo splitter RLVBACS024.
Power supplied to external Racelogic CAN modules through the “CAN” or “RS232” cables is at the same voltage as the input power supply.
Therefore when using Racelogic external CAN modules (eg; MFD or ADC03), the VBOX III supply voltage must not exceed 15vDC.
