Gasboy CFN Series Site Controller III Start-up - Manual (Page 48)

Jumpers and Switch Settings PCU
Page 42 MDE-4793A CFN Series Site Controller III Start-up Manual for CFN III Versions 3.5 and above · November 2008
4 Loosen the screw for the card cage section, and swing out the card cage.
5 Remove the pump control EXPMUX CPU board ( Figure 6-4 ), located in the rear portion of
the card cage, by pulling on the top white tab.
Figure 6-4: EXPMUX CPU Board
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.
7 Address: Verify if 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 PCU when it is connected to the CFN
System. This address is a unique identifier for multiple PCU’s 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 may not have to be corrected.
The chart on the right gives 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