Honeywell 10X User Manual page 17

Mini PTZ Dome Camera User Guide
Terminal Resistor Setup
The terminal resistor is used in the following cases:
ON
ON
Case 1: The control cable length between a camera and a
1 2 3 4
controller is very long (1:1 Connection)
If the communication cable length is over 300m with one shielded
twisted pair cable or CAT5 cable (this distance may vary when using
different impedance cables), the electrical signal will bound in the
terminal point. This reflected signal causes distortion of original signal.
Accordingly, the camera can be out of control. In this case, the
terminal resistor on the camera must be set to ON.
Case 2: Multiple cameras are connected to a controller.
The terminal resistor of the camera furthest away from the controller
must be set to ON. Do not turn on the terminal resistor of all the
cameras on the same communication cable (see Figure 2-2).
[Note] : If the terminal resistor is set to ON at the camera dome, it must
also be set to ON at the controller/DVRs. Some controllers/DVRs
having built-in impedance matching may not have a terminal resistor
switch. Please refer to your controller/DVR user's manual.
Figure 2-2 Terminal Resistor Setup for Multi-Drop Connection
Controller
Terminal Resistor ON
RS-485
#1 #2 #n
Terminal Resistor Terminal Resistor Terminal Resistor
OFF OFF ON
Document 800-06705 - Rev A - 12/10 17