Operation 5-3
SG 2000 Installation and Operation Manual
AB Override Functionality
The AB override switch (jumper JP2, illustrated in Figure 3-1) can be operated in three different
positions. The positions are B override, A override, and status monitor/MCB:
B Override
The SG2-LIDB overrides the status monitor or manual control board signal and activates receiver B,
as illustrated in Figure 5-4:
Figure 5-4
B override
Status monitor
signal
Receiver enable
logic
JP2
+5V