LEGRAND 430 521 Manuel D'utilisation page 24

• Communication Protocol Setup
• Select an appropriate Protocol with the DIP switch combination.
• Match the camera protocol with the camera protocol in the setting of your DVR or controller to control the
camera.
• Adjust the DIP switch after turning off the camera. If you changed the camera protocol by changing the
DIP S/W, the change will be effective after you reboot the camera.
The factory default protocol is "Pelco-D, 2400 bps".
• Terminal Resistor Setup
• The terminal resistor is used for the following cases.
• Case 1 : In case that the control cable length between a camera and a controller is relatively
very long (1:1 Connection)
If the communication cable length is very long, 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 of both sides i.e. the camera and the controller must be set to 'ON' state.
• Case 2 : In case that multiple cameras are connected to a controller.
Due to similar reasons with the case 1, the terminal resister of the controller and the last camera must
be set to 'ON' state. The last camera means the camera farthest in cable length from the controller. Do
not turn on the terminal resistor of all the cameras on the same communication cable.
The complete informations are in the manual on the CDrom.
Switch Mode
P0 P1
(Pin 1) (Pin 2)
OFF OFF
ON OFF
OFF ON
ON ON
Others
24
Protocol
P2
(Pin 3)
OFF PELCO-D, 2400 bps
OFF PELCO-D, 9600 bps
OFF PELCO-P , 4800 bps
OFF PELCO-P , 9600 bps
Reserved