Topics

D-tap voltage


Saul Oliveira
 

Hope everyone is ok and safe,

I am comparing the on-board 12v batteries specs. The D-tap conexion states de Amps but never seems to specify the exact voltaje. I´m wondering, do D-Taps provide always regulated 12v because that defines the standard or do they provide what voltage the battery state is. Same for the D-taps in on-board battery plates and so on.

Best Regards
Saul Oliveira
First AC
Spain


Gaylen Nebeker
 



I´m wondering, do D-Taps provide always regulated 12v because that defines the standard or do they provide what voltage the battery state is. Same for the D-taps in on-board battery plates and so on.

No Voltage Regulation with a standard P-tap.
You can be getting up to 16V from a fully charged Anton Bauer battery.


Gaylen Nebeker
NEBTEK 


Adam Brian Dada
 

I believe D-Tap ("P-Tap") is unregulated and the spec allows from 7.2 to 16.8 volts.

Adam Brian Dada
Producer
Chicago, IL

On Fri, May 8, 2020 at 10:19 AM Saul Oliveira <oliveira_saul@...> wrote:
Hope everyone is ok and safe,

I am comparing the on-board 12v batteries specs. The D-tap conexion states de Amps but never seems to specify the exact voltaje. I´m wondering, do D-Taps provide always regulated 12v because that defines the standard or do they provide what voltage the battery state is. Same for the D-taps in on-board battery plates and so on.

Best Regards
Saul Oliveira
First AC
Spain


Video Assist Hungary
 

No, they dont
the original idea of D-Tap was ro drive lights on Betacams. So they were connected direct from the onboard battery, and was not regulated to provide the maximum current available.
Its assumed D-tap is 12V, but could be up to 16V with lithium batteries.


-----------------------------

Balazs Rozgonyi IMDb
CEO - technical director / VA - DIT -  3D

0-24 central phone: +36 70 626 2354

Video Assist Hungary - Technology for your vision IMDb IMDbPro
The only video rental place in Hungary!





On 2020. May 8., at 17:19, Saul Oliveira <oliveira_saul@...> wrote:

Hope everyone is ok and safe,

I am comparing the on-board 12v batteries specs. The D-tap conexion states de Amps but never seems to specify the exact voltaje. I´m wondering, do D-Taps provide always regulated 12v because that defines the standard or do they provide what voltage the battery state is. Same for the D-taps in on-board battery plates and so on.

Best Regards
Saul Oliveira
First AC
Spain


Mitch Gross
 

There are some plates and cables from various accessory makers that offer P-Taps with 12v regulated power. 

Mitch Gross
New York


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Graham Futerfas
 

On my Movi Pro gimbal, where I use DJI's TB50 batteries, I have a special cable made that runs an extra D-Tap output straight off the batteries. It’s 26 volts, not the standard 12-16 volts, so I have to be careful which accessories I plug into it.

I chose a D-Tap connector for this accessory cable because I own so many D-Tap cables in my kit, but the battery plate also has a Lemo output if I want it. The Movi only offers a limited amount of current draw through its built-in D-Taps, so I mostly use this as an additional accessory port.

Most accessories these days, like wireless focus MDR’s or wireless video transmitters, are tolerant up to 30V, so they work very well, but some aren’t. For example, Preston MDR 3 and 4 are 30V tolerant, but the older MDR2 is 12V.

I don’t usually run the camera from this 26 volt port, but RED’s are 11.5 to 17 volts only, while Arri is happy with 10.5 to 30 volts.

Best,
-Graham



---
Graham Futerfas
Director of Photography
Los Angeles, CA
www.GFuterfas.com
---


Roger Phenix
 

Hawk-Woods makes adaptors that are regulated.  They have a plate that provides 4 D-tap sockets regulated to 12V.  They also make cables with in-line modules to regulate voltage to 12 v.  It's possible that these will down-regulate from 16.5 to 12 v, but perhaps not up-regulate from 7 to 12 (?), but you can talk to them.

Messages that are not signed will be rejected...


-----Original Message-----
From: Adam Brian Dada <ADAM.DADA@...>
To: cml-ac@...
Sent: Fri, May 8, 2020 11:21 am
Subject: Re: [cml-ac] D-tap voltage

I believe D-Tap ("P-Tap") is unregulated and the spec allows from 7.2 to 16.8 volts.
 
Adam Brian Dada
Producer
Chicago, IL

On Fri, May 8, 2020 at 10:19 AM Saul Oliveira <oliveira_saul@...> wrote:
Hope everyone is ok and safe,

I am comparing the on-board 12v batteries specs. The D-tap conexion states de Amps but never seems to specify the exact voltaje. I´m wondering, do D-Taps provide always regulated 12v because that defines the standard or do they provide what voltage the battery state is. Same for the D-taps in on-board battery plates and so on.

Best Regards
Saul Oliveira
First AC
Spain
 
 


Roger Phenix
 

some batteries with multi-D-taps on the side specify a max current supplied at each.  Some plates with D-tap have a built in replaceable fuse.  So one can't assume it's always "direct from the battery".  Usually the spec sheet will warn you if battery damage, through misapplication or defective cabling, is a possibility.

Messages that are not signed will be rejected


-----Original Message-----
From: Video Assist Hungary <balazs@...>
To: cml-ac@...
Sent: Fri, May 8, 2020 11:23 am
Subject: Re: [cml-ac] D-tap voltage

No, they dont
the original idea of D-Tap was ro drive lights on Betacams. So they were connected direct from the onboard battery, and was not regulated to provide the maximum current available.
Its assumed D-tap is 12V, but could be up to 16V with lithium batteries.
 

-----------------------------

Balazs Rozgonyi IMDb
CEO - technical director / VA - DIT -  3D
 
0-24 central phone: +36 70 626 2354
 
Video Assist Hungary - Technology for your vision IMDb IMDbPro
The only video rental place in Hungary!
 
 



On 2020. May 8., at 17:19, Saul Oliveira <oliveira_saul@...> wrote:

Hope everyone is ok and safe,

I am comparing the on-board 12v batteries specs. The D-tap conexion states de Amps but never seems to specify the exact voltaje. I´m wondering, do D-Taps provide always regulated 12v because that defines the standard or do they provide what voltage the battery state is. Same for the D-taps in on-board battery plates and so on.

Best Regards
Saul Oliveira
First AC
Spain