V7 Version 2.0
March 2012
Page 6 of 10
Even though there is an automatic fuse in the instrument it is VERY IMPORTANT
to use an external fuse (max. 3A). Power supply cables should use a minimum of
0.5 mm² wires. To prevent damage to the LX9000/8000/8080 digital unit after a
short circuit on the RS485 bus there is an automatic fuse.
If a short circuit occurs then the 57 mm unit will appear not to work anymore. The reason is
not the defect of 57 mm unit – it is due to the hot automatic fuse. Turn off the
LX9000/8000/8080 system and wait for the automatic fuse to cool down.
3.1
Installing the LXNAV V5
The LXNAV V5 vario should be mounted in a standard 57 mm hole.
Remove four screws. Install V5 into the panel, screw back all screws and.
Be sure that LXNAV V5 is placed far enough from compass. Inside is stepper
motor which generates magnetic field interferences.
3.2
Connecting LXNAV V5
LXNAV V57 is connected to main unit through RS485 bus. SC cable is used for external
switch, for switching between climb and cruise mode. In case that SC is connected to flaps
switch, VP (vario priority) is connected to switch on stick. Inputs IN1..4 are used to connect
to gear switch, air brake , etc...
3.3
Cutout of V5
Length of screw is limited to max 6mm!