5
4
Keyboard connection in the system
Indirect control the dome when connect with matrix
（
as figure 2-4.1
）
. Contrariwise will control the domes
directly
，
Parallel connect the keyboard and dome to the bus of RS-485
，
all the keyboard can control any dome
among them, under this way, the add of the main keyboard should be “1” and baud rate should be 9600bps
（
as
figure 2-4.2
）
Keyboard
Caution
1
、
the max quantity of master equip and be charged equip controlled by a RS485 bus is 32
，
so when use the
keyboard to control direct the max dome quantity is 31
2
、
max quantity keyboard in a system is 4,also the 4 keyboards should be different ID
。
Matrix
Dome
1
Dome
2
Figure
