12
2.1.5 Two Multiplexer with Slave Keyboard Controller(method 2)
SPOT MONITOR
SPOT MONITOR
RS-485(-) PIN No.5
RS-485(+) PIN No.4
BNC
1ST MULTIPLEXER
FOR SLAVE K/B
1ST MAIN MONITOR
BNC
2ND MULTIPLEXER
2ND MAIN MONITOR
FOR MASTER K/B
BNC
POWER
AC 24V
AL
5
AL
6
GN
D
AL
7
AL
8
GN
D
CO
M3
NC
3
NO
3
CO
M4
NC
4
NO
4
AL
1
GN
D
AL
2
AL
3
GN
D
AL
4
CO
M1
CO
M2
NO
1
NC
1
NO
2
NC
2
A
C
+
R
X
-(
T
X
-)
RX+(TX+)
A
C
-
(R
X
-)
F
G
N
D
A
C
+
A
C
-
(R
X
+
)
G
N
D
R
S
-4
85
(RS-422)
(R
X
+
)
(R
X
-)
RX+(TX+)
R
X
-(
T
X
-)
AC 24V
POWER
POWER
AC 24V
BNC
AWG # 24
Spot output 1 of the first multiplexer to be connected to 16
th
input of the second multiplexer.
n: User, Spot out of n
th
to be connected to (15-n)
th
camera input of the 2
nd
multiplexer. n
th
spot
out of the 2
nd
multiplexer to be connected to the n
th
use spot monitor. Each user will see the
picture of the selected camera (1~(31-n)) on n
th
spot monitor of the Mux 2 by selecting camera
No.+Cam
.
Figure 5 – Two Multiplexer with Slave Keyboard Controller
