MDE-4319A TopKAT Fuel Managment System Installation Manual · November 2005
Page 83
Pump Control EXPMUX CPU Board
Mechanical PCU Option
Pump Control EXPMUX CPU Board
1
Unlock and open the front door of the wall-mounted pump control unit or open the pedestal
access.
2
Make sure all override switches are in the AUTO position. See
3
Make sure the AC power and battery switches, located in the upper righthand corner of the
power supply are turned OFF (down).
4
Loosen the screw for the card cage section, and swing out the card cage.
5
Remove the pump control EXPMUX CPU board (
), located in the rear portion of
the card cage, by pulling on the top white tab.
6
Locate the K1 jumper patch and install the jumper. This jumper allows battery voltage to the
RAM. It should be installed for normal operation and removed for storage to prevent battery
discharge.
Figure 7-9: EXPMUX CPU Board
7
Verify that the pump control CPU board switch bank, SB (1 through 4), is set for the proper
address.
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.
