MDE-4567D 9820K Series AST Pumps Installation and Operation Manual · January 2020
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CPU Switch Settings
9820K Setup and Special Features
CPU Switch Settings
The 9820K can be configured for various operating conditions using the switches and jumpers
located on the CPU PCB (see
). Check these switches and jumpers and change their
settings, if necessary. Switch and jumper settings should be changed with the power switch
OFF. The new settings are read by the CPU PCB when the power is turned on again.
Figure 6-3: CPU PCB – Location of Switches and Jumpers
The ON position (Closed) of the switch is
towards the center of the board.
Jumper JP1 - JP9
JP1: Baud Rate
This jumper is set to reflect the communication rate of the Gasboy RS-485 pump loop: jumper
installed for 1200 baud and jumper not installed for 9600 baud. All Gasboy Fuel Controllers
communicate at 9600 baud.
Baud Rate
SW1-1
9600
Open
1200
Installed