1
2. Installation and Configuration
2.1.7 Principle of Termination
Every device that is connected at the end of the communication data line must be
terminated by either the DIP switch setting or an appropriate device such as a termination
jumper to prevent potential control signal errors.
See Figure.6 for termination switch settings and Figure.7 for examples of devices requiring
termination. Note: Total length of the cable for communication should not exceed 1.2 km
or .74 miles.
Figure.7 Illustrates the PTZ dome camera termination settings
OFF
X
ON
X
X
OFF
2
3
1
ON
X
X
X
4
ON
OFF
Not Terminated
Pull Up/Down **
Normal **
Terminated
S1 of Connector Board
S1
ON
1 2 3 4
** Unless communication error occurs, position the switch 3 & 4 of the S1 in the OFF
position. Note: Switches 3 & 4 should be set in pairs (ON or OFF together).
OFF
X
X
ON
