Operation Manual

If the P
total
and Static are connected the wrong way around there will be no
integrator reading (average climb) during the flight.
The LX8000 digital unit is connected to 12 Volt power via the 15-pin SUB-D connector. The
LX8000 digital unit, V5 vario unit and other vario indicators are connected via the RS485 bus
and the connectors are labelled with “RS485” at each end.
Please ensure that both units are connected correctly before the first power on. The power
wires (red and blue) should be connected to the main LX8000 digital unit.
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 LX8000 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 LX8000
system and wait for the automatic fuse to cool down.
8.1.1 Connecting LXNAV V5/V9
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...
8.1.2 Cutout of V5/V9
Length of screw is limited to max 6mm!