Gasboy FuelOmat system 8 Popt Commverter - Manual (Page 86)

3.5. MAIN BOARD JUMPERS
The main board includes several jumpers for different conversion methods. Each conversion
method can be set by a different jumper setting (see Figure 3-5).
NOTE
The RS-232 to RS-485 conversion configuration is
factory-set only; no access to the jumper set is required.
Table 3-3 . Main Board Jumpers Functionality
Jumper
Number Function
Cn3 RS-232 monitoring
Cn12 Keyboard option
Cn2 Display connector
Cn24 Mode select /future use
Cn6
Single wire com – Open Door
Detection Feature
Cn8 SPI/pin 1-2 shorted
Cn10 J –tag lattice
Cn25 J-tag AVR
8 Port CommVerter Operation and Installation Manual 82