EYEsurv ESC-Z30 Wiring manual - page 5
Manual is about: 30X Optical Zoom Camera w/ auto
focus - 3.0 - 90.0mm Zoom Lens
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Step 6
: Now take the other end of your communication cables and connect them
to the back of your DVR or to your PTZ controller. Once again, the red wire goes
in the "A" slot" and the black wire goes in the "B" slot. Keep in mind that your
DVR or PTZ controller may have different "labels" (instead of A and B) for the RS-
485 connection. Some may have RX+ and RX- while others have just + and -,
whatever it is, please ensure that you put the positive wire into the positive input
and the negative wire into the negative input. Once you have completed this, the
back of your DVR should resemble something like the picture below.