Pelco PT-680-24P Pan/Tilt Wiring Help Needed!

[Karl in NY 0]

I bought several surplused Pelco PT680-24P pan/tilt units, and don't understand what I have.

 

I have deployed many similar units, but these confuse me.

 

24VAC, that's a given.

I have the both the Pelco Install manual and Service manual for this model number.

 

The pan motors are what I expected: three wires, Red, Blue, Gray.

 

The tilt motors only have two wires, Yellow and White. The manuals show that both the pan and the tilt motors for these models should be the same, but, they are not, in my case. One motor wire missing, and the other two the wrong colors.

 

My first guess was that the tilt motors with only two leads might have the motor "common" grounded to the frame, eliminating one of the three leads, but the ohmmeter shows no connection between the pan/tilt common (brown wire) and anything metal.

 

I'm hesitant to fry anything without some guidance...

 

Any knowledge out there about these?

 

Regards-

 

Karl

[Karl in NY 0]

My goof. I looked at these units again in better light, and there is indeed a third wire in the tilt wire bundle. Don't how I overlooked it the first time, except for the poor lighting.

 

I also discovered that one of the units has no pan switch or wiring, so it must be one of the 360-degree models. Never saw one before, and not too useful to me.

[Soundy 1]

Send me one; I'll suss it out and tell you everything you need to know about the rest of them

[Karl in NY 0]

Actually, the PT680-24SL, the one with 360° pan, I would like to liquidate, but only to a good home

 

I can't forsee any use for that feature with the projects I'm working on. I only have $115 invested in it (about a third of that in shipping costs because it's so heavy).

 

So, if anyone needs that model, cheaply, let me know.

 

-Karl (near Albany)

[survtech 0]

Karl,

 

Here is a link to the Pelco product site: http://www.pelco.com/global/en/products/camera-solutions/range-presentation.page?p_function_id=9504&p_family_id=10221&p_range_id=2868#. Go there, click on Downloads, then click on Manuals and you can access the Installation/Operation and Service manuals. The Installation/Operation manual contains the connection diagrams.

 

- Carl

[Karl in NY 0]

All set now.

Thanks.