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