Gasboy TopKAT Fuel Management System Installation User Manual
Page 91
MDE-4319E TopKAT™ Fuel Management System Installation Manual · August 2008
Page 85
Pump Control EXPMUX CPU Board
Mechanical PCU Option
An address must be set to identify the pump control unit when it is connected to the TopKAT
system. This address is a unique identifier for multiple PCUs that are connected on the same
RS-485 line. 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 line does not have to be address 1.
Switches 1 through 4 denote the address. This is factory set and does not have to be corrected.
The table below provides the switch settings for the address selections.
Address
SB-1
SB-2
SB-3
SB-4
ADDR1
ADDR2
ADDR3
ADDR4
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
8
Switches SB-5 through SB-8 are not relevant to the operation of this unit and should be set to
Closed.
9
The settings for switch bank SC (1 through 4) determine when the pump control unit begins
counting pulses for a particular pump. When a switch is open, the PCU begins counting pulses
when the corresponding pump is activated. When a switch is closed, as it should be for most
configurations using mechanical pumps, the PCU does not count pulses for the corresponding
pump until the mechanical reset has completed. The table below provides the switch settings
for SC-1 through SC-4.
Switch
Function
SC-1
Mode pump 1
Open = Normal, Closed = Reset Complete
SC-2
Mode pump 2
Open = Normal, Closed = Reset Complete
SC-3
Mode pump 3
Open = Normal, Closed = Reset Complete
SC-4
Mode pump 4
Open = Normal, Closed = Reset Complete