Last Revised 05/09/2013
15
You should initially be wiring the dome to the keyboard or DVR on your workshop bench or
at least your kitchen table to prove you know how to get everything to work. Once you have
done this, it is just a job of extending the cables and physically installing the domes on site.
You must obviously take note of the RS485 wiring techniques mentioned at the beginning of
these instructions and get the 120ohm resistors correct at the “End of line” domes. Generally
speaking you will always be extending the RS485 signal from either the keypad or the dome
using a CAT5 or similar cable.
Note that data cables do not need to be connected through
baluns.
If you use cores from two different pairs in the CAT5 cable you will not get the benefit of the
shielding effect of the cable twists and the dome will function erratically. You must always
use a core from a PAIR, not two cores from two different pairs!!
Connecting the video out of the dome.
Rear of PTZ730
The PTZ730 and PTZ700 are just two of the keypads
that can be used with the PTZ640 series. On the rear
of the keypads you will see the RS485 connections.
Ensure they are connected correctly i.e the RS485 + A
line and the RS485 – B line. Always connect to the
T
ransmit and not the
R
eceive connections.
Note that both these keypads need to be set to the
same protocol as the PTZ dome. Refer to the relevant
keypad instruction manuals on the keypad dipswitch
settings.
PTZ730
keypad
PTZ700 keypad
RS485 connections
RS485 connections
Rear of PTZ700
