Re: multiple PTZ on dvr?

[Bob La Londe <none@xxxxxxxxxxxxxxx>]

On 4/18/2011 4:37 PM, Chuck wrote:
> Bob La Londe wrote:
>
>>
>> I think you just assign an address to each camera.  Look over your docs.
>>    I do Pelco PTZ over RS422 on Dedicated Micros DVRs that way regularly.
>>    Each one has a unique address.  Alternatively, if they support control
>> over coax (coaxitron) then whatever camera is selected receives the
>> control signals.
>>
>> Contact Pelco if you are stuck on their equipment and ask them.
>
>
>
>
>
> The manual shows a single connection to a single PTZ camera.  The protocols
> do talk about addressing as you mentioned so I can understand the
> communication scheme.
>
> Unfortunately, there is only the single set of pins D+ and D- to address all
> cameras.  In all fairness, Speco included a DA-15, D-sub solder-type
> connector to mate with the rear connector on the DVR.  Unfortunately, they
> did not include a breakout box or cable.  It's a bit primitive.  I'll call
> them to clarify later.
>
> Overall, I think I would be better served to find a ptz controller that was
> a little more refined and just use the dvr for display and record.  If you
> could recommend any gear, I'd sure appreciate it.  I sure wish I could have
> seen this coming -- it's a real good argument for using a pro......

Look through everything.  Its probably just a 2 wire daisy chained (in
parallel) configuration.  There may or may not be a termination setting
for the last camera on the chain.

It may seem simpler to use a separate standalone controller, but I
assure most times in the long run its better to use the integrated
solution.  Often that allows for network access AND control.

I know on the DM DVRs and Pelco PTZs I use mostly I can both view and
control the cameras across the Internet.  There are only a very few
instances when its better to have a separate non integrated control.  In
cases where somebody may need to have access to live viewing and control
of a single camera or group of cameras, but not have access to the DVR.
  I have one facility that fits that bill, and it was mostly done that
way due to the paranoia of the customer.