DH-PFA151 (Corner Mount Bracket) + DH-PFB305W (Wall Mount Bracket) + DH-PFA120 vs DH-PFA126

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CaptainCalculon

n3wb
Aug 10, 2022
25
3
Melbourne, Australia
I have a new PTZ camera installation coming up using the DH-PFA151 corner mount bracket.
PTZ Camera: SD6C3425GB-HNR-A-PV1 [Net Weight: 4.6kg]

This camera comes with the DH-PFB305W Wall Mount Bracket. [Load Bearing: 5.0kg -- Net Weight: 0.87kg]

My plan is to purchase the DH-PFA120 Water-proof Junction Box, which is a perfect fit for the DH-PFB305W Wall Mount Bracket.
[Load Bearing: 7.0kg -- Net Weight: 0.53kg]

I have used the DH-PFA120 Water-proof Junction Box with the same camera mounted directly onto brickworks.

This time I would like to use the DH-PFA151 Corner Mount Bracket which will be mounted onto the corner brickworks first. [Load Bearing: 10.0kg -- Net Weight: 1.7kg]

TL;DR: Corner Brickworks |> DH-PFA151 |> DH-PFA120 |> DH-PFB305W |> SD6C3425GB-HNR-A-PV1

I have double checked the load bearings and the weights. It should all work.
The only problem I am running into is how to seal / water-proof the knockout at the rear of the DH-PFA120 junction box and the DH-PFA151 bracket.

Could someone please recommend the Dahua gland accessory / reducer that I could screw into the back of DH-PFA120 & DH-PFA151?
The nominal diameter of this knockout for DH-PFA151 is 35.0mm.

Alternatively, what would be the best way to seal / waterproof this knock out completely?
With this approach, I could just use one of the M20 inch thread ports on the bottom or right of the DH-PFA120 unit for passing the PoE+ ethernet cable and audio cables.

The other solution is to use the Dahua recommended junction box for this camera -- DH-PFA126. [Load Bearing: 8.0kg -- Net Weight: 1.56kg]
There is no knockout at the back of this junction box. Sadly, I have to wait > 3 weeks before my local supplier can ship this item.
 
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The specs for the PFA-120 you linked state that the hole diameter at the back is 50mm. I'd consider a closed rubber grommet for the hole, sealed in-place with non-gassing silicone sealant. You can also apply the sealant to the CAT cable after drilling a small hole in the solid part of the grommet.

I'm a a big fan of duct seal but a 50mm / 2" knock-out hole is a pretty big hole.

Be sure to use dielectric grease and to waterproof the CAT cable to pigtail connection as here after testing. :cool:
 
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Thank you so much for all the links, especially the rubber grommets. Definitely ordering these.

TonyR said:
I'm a a big fan of duct seal but a 50mm / 2" knock-out hole is a pretty big hole.
Click to expand...

What you have stated above is the correct nominal diameter for the DH-PFA120 unit.
However, once it is screwed tight onto the DH-PFA151 Corner Mount Bracket the knockout is then reduced to a nominal diameter of 35.0mm.

Many thanks for the tips.
 
TonyR said:
Be sure to use dielectric grease and to waterproof the CAT cable to pigtail connection as here after testing. :cool:
Click to expand...

In Australia, Home Depot is known as Bunnings Warehouse. They used to stock the CRC dielectric grease, but no more.
So, I have turned to Amazon and eBay.

I found this one:
Before I place an order for 2 units, could you please tell me if the above will be good enough to get the job done, @TonyR ?

What would be really helpful is if you had a photo of the application area for the CAT cable connection.
I wanted to pass this onto my cabler as he thinks this is overkill.

I know you have adequately described where to apply the dielectric grease within the thread linked above, but a picture tells a thousand words. :thumb:

TonyR said:
I'm a a big fan of duct seal but a 50mm / 2" knock-out hole is a pretty big hole.
Click to expand...

Yes, you are. ;)

The closest thing to duct seal I found "down under" (Australia) is this: Bostik Sealant 250g Plumbers Putty.
I probably won't need it for this project, but always good to have this one handy.
 
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You could also use the proper sized freeze plug available at your local auto parts store.


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CaptainCalculon said:
Hi @TonyR

Would you recommend the following Duct Seal product?


This product is manufactured by the RectorSeal Corporation. It seems to be very popular in the US.

It seems to be a tad bit better than the Bostik Sealant 250g Plumbers Putty.
Click to expand...
I have no experience with the RectorSeal product but it appears very similar to the G & B Duct Seal I linked. Like the G& B product, the RectorSeal says it can be used outdoors whereas the Bostik Plumbers Product spec sheet discourages outdoor use where prolonged exposure to sunlight can harden and shrink it.

Based on that, I 'd go with RectorSeal if G&B is not available in AUS. :cool:
 
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