Raytheon STD 21 GPS, Operation Manual, Page: 55 / 119

Satellite Compass
STD 21 GPS
STD 21 GPS
47
Edition: Feb. 05, 2007
3717/110--850.DOC020002
3.3.4.1 Check of jumper settings for the CAN bus termination
Jumper X303 for CAN 2 termination
Jumper X302
for CAN 1
termination
Figure 40: Termination for CAN bus
For the STD 21 GPS (stand alone) both jumpers must be inserted (default).
For Operator Unit CAN bus jumpers, see section 3.4.4.3.
The above mentioned jumper settings have to be set if the Processor Unit is at one end
of the CAN bus.
This is true if the STD 21 GPS is a standalone system with one Processor Unit and one
Operator Unit.
If more than these two devices are connected to a CAN bus, then only the
end--devices of the CAN bus must be jumpered. All other devices must not be jumpered
(see also section 1.2).