Motorola SG 2000 用户手册
O p e r a t i o n
5 - 3
SG 20 00 Ins tal la tion and O pera tion M anua l
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:
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:
as illustrated in Figure 5-4:
F i g u r e 5 - 4
B o v e r r i d e
B o v e r r i d e
Status monitor
signal
Receiver enable
logic
JP2
+5V