21
WJ-PB85R08 RS-485 Data Board
■
Preface
The WJ-PB85R08 RS-485 Data Board is an optional board for exchange of control data between the Camera Control Cage
(MXCONT) and the camera site.
■
Appearance
TXD
TB
RA (+)
RB
GND
RXD
R
T
TA (+)
S W
1
R
T
:
Termination Resistor
SW:
Selection Switch, Full Duplex/ Half Duplex
GND: Ground; Connected to each channel and
common ground.
q
Data Connectors (TA/TB/RA/RB/G 1 - 8)
These connectors are used to exchange control data with the camera site devices. For con-
nection, use a data grade shielded 4-wire twisted pair cable suitable for RS-485 communica-
tion.
q
RS485
A
T
B
A
R
B
G
A
T
B
A
R
B
G
A
T
B
A
R
B
G
A
T
B
A
R
B
G
1
2
3
4
A
T
B
A
R
B
G
A
T
B
A
R
B
G
A
T
B
A
R
B
G
A
T
B
A
R
B
G
5
6
7
8
