GE D20 - Other Jumpers; JP8 - Battery Backup Enable;Disable; JP4 - Watchdog

D20/D200
Installation and Operations Guide
GE Energy
994-0078-2.00-7 General
44
Full
Connections and Configuration, continued
D20ME Jumpering, continued
JP4 - Watchdog
This 2-positi
on jumper enables or disables the hardware Watchdog.
Note:
The Watchdog should never be left disabled during normal operation of
the D20ME.
JP4 Pins Jumper Position Function
pin 1 to 2 (center) disables the hardware Watchdog. Pin 1 = SLOWCK
Pin 3 = /WD
pin 3 to 2 (center) enables the hardware Watchdog.
JP8 – Battery
Backup
Enable/disable
The D20ME card has two 3.6V lithium batteries to maintain NVRAM contents in the
event of a power failure.
Important:
Disconnect the batteries if the board is to be stored for extended periods.
Jumper Position Function
pin 1 to 2 disconnects the batteries from the NVRAM
pin 3 to 2 connects the batteries to the NVRAM
JP8
pins 4 to 5 always jumpered
Other Jumpers
Jumpers JP5, JP6 and JP7 are not user configurable. They are for factory test only.