9820K Setup and Special Features
CPU Switch Settings
Page 38
MDE-4567D 9820K Series AST Pumps Installation and Operation Manual · January 2020
Switch SW2
CPU Board (M06333KXXXX) can also be configured for various operating conditions using
the switch positions SW2-1 through SW2-10. Verify these switches and change, if required.
Switch settings must be changed with the power to the pump/dispenser set to “Off” position.
CPU board reads new switch settings only during power up.
Note: A switch in the closed position indicates that the switch is “On” (towards the center of
the CPU board).
SW2-1 through SW2-4
These four switches serve a dual purpose: as an address setting when communicating on the
Gasboy RS-485 loop or as a pulser output rate selector when pulser data is sent to all Gasboy
Controllers using Pulse-Output mode or any non-Gasboy fuel management systems.
Address Switches
A unique address identifier must be set when the 9820K is connected to the Gasboy RS-485
pump loop via the RS-485 I/F PCB. Since there are 16 possible address combinations, up to 16
units (single or twin) may be connected to the pump loop. Addressing should start at 1 and
continue sequentially through 16. The physical wiring order does not have to correspond with
the address order; that is the first unit on the RS-485 loop does not have to be address 1.
Tabulated below are the switch settings and address selections.
Address
SW2-1
SW2-2
SW2-3
SW2-4
1
Closed
Closed
Closed
Closed
2
Open
Closed
Closed
Closed
3
Closed
Open
Closed
Closed
4
Open
Open
Closed
Closed
5
Closed
Closed
Open
Closed
6
Open
Closed
Open
Closed
7
Closed
Open
Open
Closed
8
Open
Open
Open
Closed
9
Closed
Closed
Closed
Open
10
Open
Closed
Closed
Open
11
Closed
Open
Closed
Open
12
Open
Open
Closed
Open
13
Closed
Closed
Open
Open
14
Open
Closed
Open
Open
15
Closed
Open
Open
Open
16
Open
Open
Open
Open