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RS-485 keyboard
Connect the RS-422/485 connector to a RS-485 keyboard controller
(AKB-200/300) via the appropriate cables. Please refer to the following diagram
for the pin definitions of the RS-422/485 connector. Please make sure to set the
RS-422/RS485 Selector Switch and setup the RS-422/485 configurations as
described in Section 6.9 accordingly. Please refer to Appendix D for the
Keyboard Control Protocol for the digital video recorder.
For 4-line devices (such as keyboard) Pin #1~Pin35
DVR Devices
For PTZ cameras Pin#1~Pin#3 (Normally connect only Pin#2 & Pin#3 also
work)
DVR Devices
N
/C
N
/C
G
N
D
R
xD
+
R
xD
-
T
xD
+
T
xD
-
G
N
D
Always set this unit
to RS-422/485 4-line
no matter what the
connected devices
are.
GND
TxD-
TxD+
RxD-
RxD+
GND
TxD-
TxD+
RxD-
RxD+
GND
RS485-
RS485+
GND
TxD-
TxD+
RxD-
RxD+