ASIair Pro Current Output of 12V Jacks ?

Astrophotography has never been easier

Moderators: yang, Sam, lancer jiang, Ji.zwo

Post Reply
jwaters125
Posts: 32
Joined: Sat Mar 31, 2018 11:13 pm

ASIair Pro Current Output of 12V Jacks ?

Post by jwaters125 » Sat Feb 22, 2020 1:54 am

What the available current output of the ASIair Pro 12 volt jacks? The ASI2600, 6200 and 533 can not be powered from the 12 volt ASIair Pro power jacks. If we just cool the above camera's to lets say -15 or -20 can the ASIair power these camera's?

User avatar
Ji.zwo
Posts: 401
Joined: Tue May 29, 2018 3:29 am

Re: ASIair Pro Current Output of 12V Jacks ?

Post by Ji.zwo » Mon Feb 24, 2020 10:50 am

jwaters125 wrote:
Sat Feb 22, 2020 1:54 am
What the available current output of the ASIair Pro 12 volt jacks? The ASI2600, 6200 and 533 can not be powered from the 12 volt ASIair Pro power jacks. If we just cool the above camera's to lets say -15 or -20 can the ASIair power these camera's?
Can't do that. We need an external power supply.
ZWO | Tech Support
Location:lon=120.6 lat=31.3
SuZhou China

gundamrx91
Posts: 37
Joined: Fri Nov 08, 2019 10:54 am

Re: ASIair Pro Current Output of 12V Jacks ?

Post by gundamrx91 » Mon Feb 24, 2020 12:27 pm

So, what's the use of the 12V output?

Giuseppe

jwaters125
Posts: 32
Joined: Sat Mar 31, 2018 11:13 pm

Re: ASIair Pro Current Output of 12V Jacks ?

Post by jwaters125 » Mon Feb 24, 2020 3:36 pm

"Can't do that. We need an external power supply." Why? As an example at 1.5 amps the ASI2600 MC Pro can be cooled down to -12 degrees C. The ASI6200MC Pro down to -8 degrees C.

What's the available current out put of the 12 volt jacks?

Can the ASIair Pro power the ZWO EAF? Some dew heaters pull around 2 amps? If the ASIair Pro can not supply 2 amps the 12 volt jacks are pointless.

W7AY
Posts: 171
Joined: Fri Jan 25, 2019 3:38 am
Location: Portland, Oregon, USA

Re: ASIair Pro Current Output of 12V Jacks ?

Post by W7AY » Mon Feb 24, 2020 7:48 pm

A quick check of the specifications (https://astronomy-imaging-camera.com/product/asiair-pro) show that each of the power outlets is capable of supplying 3A at 12V.

There is a max 12V input current. However, it is not stated what the total output current is actually supported. The specs show 12V input being between 2A to 6A. The 2A is presumably the consumption of the ASIAIR itself, that leaves about 4A to be shared by the four outlets, perhaps.

ZWO had mentioned the ability to PWM at least some of the 12V outputs (to control dew heaters). It so, those outlets are not purely passthrough power ports. So, in addition to the current carrying capability of the 5.5mm/2.1mm axial power connectors itself, the PWM circuit can be limiting the output currents too, unless you start to add large heavy heatsinks.

In any case, the gauge of the cable themselves are also limiting - anything like 6A over a 10 foot run already requires a heavy power cable. At just 6A, 10 foot run of a 14 AWG pair already drops the voltage by about 0.3V. And I would bet that many amateurs are unaware of this and use cables that are thinner than 14 AWG. This undoubtedly causes some of the odd failures that you read about.

I myself use a PowerPole distribution box to split off the primary 12V power (PowerPoles are capable of passing dozens of amps), and I have a small box with 5.5/2.1mm connectors (a couple are homebrew, and a couple are from deepskydad.com) to distribute power to small accessories that is mounted for example on a dual saddle plate.

For what its worth, deepskydad's DC Hub can support up to a total of 10A power output (each of the five outputs can support a max of 10A, and are short circuit protected by self healing fuses, but no PWM ability).

If you insist on buying an ASIAIR Pro, but need to support more power than the ability of ASIAIR Pro itself, just go buy the DC Hub from deepskydad, or build your own.

Clear skies,
Chen

User avatar
Ji.zwo
Posts: 401
Joined: Tue May 29, 2018 3:29 am

Re: ASIair Pro Current Output of 12V Jacks ?

Post by Ji.zwo » Thu Feb 27, 2020 9:10 am

Hello guys, sorry for my previous wrong answer. Here we go:

ASIAIR PRO's USB power supply is not enough for ASI6200/ASI2600/ASI533//ASI071MC cameras to work normally, so please use an external 12V power supply, which can be connected to the ASIAIR PRO's power management as well.
ZWO | Tech Support
Location:lon=120.6 lat=31.3
SuZhou China

gundamrx91
Posts: 37
Joined: Fri Nov 08, 2019 10:54 am

Re: ASIair Pro Current Output of 12V Jacks ?

Post by gundamrx91 » Thu Feb 27, 2020 2:28 pm

Ji.zwo wrote:
Thu Feb 27, 2020 9:10 am
Hello guys, sorry for my previous wrong answer. Here we go:

ASIAIR PRO's USB power supply is not enough for ASI6200/ASI2600/ASI533//ASI071MC cameras to work normally, so please use an external 12V power supply, which can be connected to the ASIAIR PRO's power management as well.
Ok, it's clear, we can't use the USB port but one of the four DC 12V output port to the DC12V input port of the camera. Is it right?

Giuseppe

User avatar
Ji.zwo
Posts: 401
Joined: Tue May 29, 2018 3:29 am

Re: ASIair Pro Current Output of 12V Jacks ?

Post by Ji.zwo » Fri Feb 28, 2020 7:42 am

gundamrx91 wrote:
Thu Feb 27, 2020 2:28 pm
Ji.zwo wrote:
Thu Feb 27, 2020 9:10 am
Hello guys, sorry for my previous wrong answer. Here we go:

ASIAIR PRO's USB power supply is not enough for ASI6200/ASI2600/ASI533//ASI071MC cameras to work normally, so please use an external 12V power supply, which can be connected to the ASIAIR PRO's power management as well.
Ok, it's clear, we can't use the USB port but one of the four DC 12V output port to the DC12V input port of the camera. Is it right?

Giuseppe
Yeah, def right.
ZWO | Tech Support
Location:lon=120.6 lat=31.3
SuZhou China

gundamrx91
Posts: 37
Joined: Fri Nov 08, 2019 10:54 am

Re: ASIair Pro Current Output of 12V Jacks ?

Post by gundamrx91 » Fri Feb 28, 2020 4:04 pm

Thanks :D

Giuseppe

Post Reply