Jump to content


Photo

Voltage to look at not to fry accesories/power ports in the camera

voltage accesories camera short

  • Please log in to reply
1 reply to this topic

#1 davide sorasio

davide sorasio
  • Basic Members
  • PipPip
  • 93 posts
  • Student
  • New York

Posted 05 May 2016 - 04:13 PM

Hi everybody! One of my biggest fears on set is to fry camera accessories because of misunderstanding of voltage etc etc. I know that some accessories like TV logic need 12 volts while other like follow focus motors etc need 24 volts. What I do not understand is how do I know which voltahe is the correct for each accessories and what's the voltage of each power port (If I'm not wrong RS ports are 24v while Dtap is 12-18). Is there any rule of thumbs or does anybody have a more defines explanations that goes beyond my knowledge of the topic? My understanding of electricity is pretty basic too.

Thank you in advance for the help!


  • 0

#2 evanwalsh

evanwalsh
  • Basic Members
  • PipPip
  • 15 posts
  • 1st Assistant Camera
  • New York

Posted 05 May 2016 - 07:08 PM

If unsure always ask a technician at the rental house. You can also consult a product's website/operation manual to find the acceptable input voltage range.

Teradek's for example can accept between 7-28 volts, you could safely power it off a 12V 2-pin lemo/ptap cable or a 24V power out on a Panaflex.

Not always, but sometimes you can find a label with the acceptable voltage range near the power input of a device.

 

If I understand this correctly, RS ports (3 pin Fischer), will pass through what ever power is being fed to the camera, either 12V or 24V, where as the 2-pin Lemo's will be regulated to 12V (in the case of the Alexa at least).

 

One thing to consider if afraid of frying accessories is polarity. Many accessories will use the 2-pin Lemo connector for power, but different brands can use different polarities. If you used a Bartech's 2-pin Lemo cable for power on a Teradek you could damage it.
I took this from Media Blackout's 2-pin Lemo page, "Pin-1 positive voltage, (Bartech, Letus, Redrock, etc.), and Pin-1 ground (GND) (Teradek, Preston, Paralinx, Arri, etc.)".

 

Just be sure to not mix up cables between the accessories when shooting.


Edited by evanwalsh, 05 May 2016 - 07:10 PM.

  • 1



Also tagged with one or more of these keywords: voltage, accesories, camera, short

Technodolly

rebotnix Technologies

Aerial Filmworks

CineTape

Tai Audio

Media Blackout - Custom Cables and AKS

Willys Widgets

Paralinx LLC

FJS International, LLC

CineLab

Wooden Camera

Abel Cine

Broadcast Solutions Inc

New Pro Video - New and Used Equipment

Gamma Ray Digital Inc

Visual Products

Rig Wheels Passport

The Slider

Metropolis Post

Glidecam

Ritter Battery

Tai Audio

Metropolis Post

Wooden Camera

Broadcast Solutions Inc

New Pro Video - New and Used Equipment

Willys Widgets

The Slider

CineLab

CineTape

rebotnix Technologies

Visual Products

Abel Cine

FJS International, LLC

Paralinx LLC

Aerial Filmworks

Glidecam

Ritter Battery

Rig Wheels Passport

Media Blackout - Custom Cables and AKS

Gamma Ray Digital Inc

Technodolly