Philips Video Camera - Manual (Page 11)

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Figure 9 - Layout of Switches
2.3 Setting Unit for Termination
The device which is connected at end of line, whether it is a dome camera or keyboard controller, must have the cable for communication terminated by
setting the appropriate DIP switch. Without proper termination, there is potential for control signal errors. Total length of the cable for communication should
not exceed 1.2km.
SW1 1 2
Terminated ON ON
Not terminated OFF OFF
Figure 10 - Setting Unit for Termination
Termination switches
Addresses (ID) and protocol
selection switches