Elmo PTC-200C - Manual (Page 26)

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10. TERMINATING RESISTANCE AND ID ADDRESS SETTINGS
The ID address of the RS-485 and the terminating resistance can be set by using the
switches Nos. 1 through 9 of the DIP Switch (10) located on the bottom of the Main Unit.
Switch No.
1 – 8
9
10
Function
Sets the ID address.
Turns ON/OFF the terminating resistance
None
[1] Setting the terminating resistance
The terminating resistance is built in each Camera, and it can be turned ON/OFF by using
the pin No. 9 of the DIP Switch (10) of each Camera. To prevent the attenuation of the
signal, turn ON the terminating resistances of the 2 Cameras located at both ends of the
longest route, of all cameras to be connected to the RS-485 interface, and turn OFF the
terminating resistances of the other Cameras.
DIP Switch (10)
[2] Setting the ID address
The ID address for communication of the RS-485 can be set by using the switches No. 1
through 8 of the DIP Switch (10). (Refer to "Setting the ID address" table - P26, 27)