Gasboy CFN Series Site Controller III Start-up - Manual (Page 43)

MDE-4793A CFN Series Site Controller III Start-up Manual for CFN III Versions 3.5 and above · November 2008 Page 37
SC COMM CPU PCB Jumpers and Switch Settings
6 – Jumpers and Switch Settings
This section covers the jumper and switch settings for the various components of your SC III
system.
Jumpers and switch settings must be set properly to ensure correct operation.
IMPORTANT INFORMATION
SC COMM CPU PCB
Figure 6-1: SC III Comm CPU Board
Jumpers, K3 to K12
Jumper Function Setting
K3 AC power fail sense 2 - 3 to enable
1 - 2 to disable
K4 AC watchdog timer 1 - 2 to enable
K5 SC - Comm CPU (testing only) 1 - 2 to reset
K6 RS-485 loop 1, 2 to 4 wire 2 - 3 for 4 wire
1 - 2 for 2 wire