Portable Plasma Torch Height Controller Manual (F1620)
Figure 3.10 Three proximity switch connection method
Warning：
1）It is better for user to connect NPN proximity switch as above drawing. By this
method, any one of them effective, THC can receive this signal.
2）When user use a NPN normally open proximity switch(or some NPN normally
open proximity switch ), L09 should be set as 0.
3）When proximity switch is breaking away from, the red indictor light of proximity
switch can be . At the same time, the collision indictor in THC panel can be
lighted.
4）In genal, if collision and torch incline do not happen, the red indictor light of
proximity switch will be lighted straight.
3.2.4 USB port
THC have a function which can make firmware procedure upgrade. User can use
USB flash disk, make it connect this USB port, then it can make firmware procedure
upgrade.
The upgrade method：
1）Copying the firmware program named “pthc.bin” or “f1620.bin” to the root
directory of USB flash disk.
2）Power off THC, and then insert this USB flash disk.
3）Power on THC. After THC power on, the green nixie tube may display
27
