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Microprocessor Watchdog Timer
The 9612 Plus includes a watchdog timer within the microprocessor. In the un-
likely event that your TNC firmware gets into an infinite loop, the watchdog
timer will detect the failure and force a soft reset of the 9612 Plus. No parameters
will be lost due to this reset.
A/D Converter
Two A/D converter inputs are available to the KPC-9612 Plus and are used with
the Analog command. These inputs can be used to measure “DC” external volt-
ages from 0V to 5VDC, with up to 8-bit accuracy.
Note: If you want to measure voltages greater than +5VDC, the signals need to at-
tenuated (by installing resistors R13 or R27 on the printed circuit board) to divide
them down in voltage. Choose resistance values to scale the desired input voltages
to 5VDC max at test points “J” or “K” on the printed circuit board.
+ Note: Maximum input measurement of +5VDC can be made. Maximum input
voltages to the A/D inputs should not exceed 50V or damage may occur.
KPC-9612 Plus Jumpers
Locations and descriptions of KPC-9612 Plus Jumpers are given in this section.
Jumper Locations
+ To locate jumpers listed below, use the schematic shipped with the unit and
(for locations on the printed circuit board) the parts layout in Appendix E.
Printed
Schematic Ciruit
Jumper #
Location
Location
Name
.
1
B-1
D-1
DB-9 Ground/Reset
2
B-1
D-1
Serial Configuration
Appendix B: Advanced Information
Microprocessor Watchdog Timer
User’s Guide
302
KPC-9612 Plus v 8.2
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