Speco Technologies KBD-927 - Manual (Page 12)

12
2.2 Termination & Dip Switch Setting
The first and last devices in an installation (dome and keyboard controller) must have the data
line terminated by setting the DIP switch. Without proper termination, there is potential for
control signal errors. Total length of the cable for communication should not exceed 1 mile.
Refer to Figure 7 for setting the dome camera and keyboard controller termination.
Cable for communication
More than two branches require repeater
(HID2404SR) which allows additional branches.
Termination should be On
Termination should be On
Cable for communication
Figure 7 – Termination and ID Switches.
Termination and Master/Slave: Set the switches according to your configuration.
ON
9J 1 2 3 4 5 6 7 8 S2
Figure 8 – Keyboard DIP Switches