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Mechanical PCU Option
Switches 1 through 4 denote the address. This is factory set and may not have to be corrected.
The table below gives the switch settings for the address selections.
Address
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
8
Switches SB-5 through SB-8 are not relevant to the operation of this unit and should be set to
Closed.
The settings for switch bank SC (1 through 4) determine when the pump control unit begins
9
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 gives the switch settings for
SC-1 through SC-4.
Switch
SC-1
SC-2
SC-3
SC-4
In switch bank SC, 5 through 8, only switch 6 and 8 are active. Switch SC-6 is the Deadman
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Timer Switch. If enabled, the pump control unit must be polled at least every 15 seconds by
the TopKAT. If it fails to sense a poll at that time, it turns all relays off. If Reset Complete
Mode is used on any pump on a particular PCU, the deadman timer should be disabled.
Switch SC-8 enables the test mode allowing the basic PCU functions to be tested without the
use of a site controller.
Page 84
SB-1
SB-2
ADDR1
ADDR2
Closed
Closed
Open
Closed
Closed
Open
Open
Open
Closed
Closed
Open
Closed
Closed
Open
Open
Open
Closed
Closed
Open
Closed
Closed
Open
Open
Open
Closed
Closed
Open
Closed
Closed
Open
Open
Open
Function
Mode pump 1
Open = Normal, Closed = Reset Complete
Mode pump 2
Open = Normal, Closed = Reset Complete
Mode pump 3
Open = Normal, Closed = Reset Complete
Mode pump 4
Open = Normal, Closed = Reset Complete
MDE-4319A TopKAT Fuel Managment System Installation Manual · November 2005
Pump Control EXPMUX CPU Board
SB-3
SB-4
ADDR3
ADDR4
Closed
Closed
Closed
Closed
Closed
Closed
Closed
Closed
Open
Closed
Open
Closed
Open
Closed
Open
Closed
Closed
Open
Closed
Open
Closed
Open
Closed
Open
Open
Open
Open
Open
Open
Open
Open
Open
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