12v power connector polarity at DVinfo.net

Shaughan Flynn · February 16th, 2010, 01:46 PM

Anyone know what the polarity of the power connector is on an EX1/3?

Giroud Francois · February 16th, 2010, 02:02 PM

usually it is written on the power supply

Kevin Spahr · February 16th, 2010, 02:08 PM

The outer shell is negative, pin is positive.

Bo Skelmose · February 16th, 2010, 02:52 PM

Check it with a meter from the AC supply. I remember, as if it was a strange choice from SONY. I'm not sure....

Alex Dolgin · February 16th, 2010, 03:17 PM

Kevin is correct. The inner pin is plus.
HTH

Bo Skelmose · February 16th, 2010, 03:51 PM

almost certain that pin is minus and shell is positive - i'll check

Grabbed this : The EXDC1 4 Pin XLR to DC Adaptor is sold as a "stand alone" product and is simply a "pass through" that meets the polarity standards of the Sony XDCAM EX cameras when used with industry standard 4 Pin XLR power configurations.

Due to the fact that this cable is a “pass through” with no voltage regulation, it is the user’s responsibility, when using the EXDC1, to ensure that power sources meet both the polarity and voltage requirements of their camera or equipment. (EXDC1 Specs Pin 4 to Shell, Pin 1 to Tip)

4pin XLR are are pin 1 minus and pin 4 positive !!!!!!!!!!!!!!

http://www.filmwareproducts.com/Vort.../VM-EXDC1.html

Warren Kawamoto · February 16th, 2010, 04:24 PM

Bo,
Your information is wrong. While XLR 4 pin is pin 1=negative and pin 4=positive, on the camera side, center pin is positive, outer shell is negative. I just confirmed this by using a voltmeter on the output.
Sony does have a non-standard dc connector, by that they mean it's SHAPE and size is non-standard, not the polarity.
Just to be clear to not confuse anyone, center pin is positive, outer shell is negative.

Bo Skelmose · February 16th, 2010, 04:32 PM

Great - you have to be 100 % sure before you connect - so now there should not be any problem with this :-)
Sorry to have confused you.

Paul Hudson · February 16th, 2010, 05:36 PM

Always check polarity with a multi meter. This is not something you want to make the wrong decision on. The results could be a disaster.

Paul Hudson
Lizardlandvideo.com
Phoenix video production

Paul Kellett · February 17th, 2010, 05:26 AM

Centre pin is definitely positive, i've just made a lead to power my EX1 from the top stage of my Pilot.
The lead has been used a coulpe of times, nothing blew up.
Centre pin is +.

Paul.

Piotr Wozniacki · February 17th, 2010, 06:39 AM

Confirmed.

John Hedgecoe · February 17th, 2010, 08:00 AM

Yes, center pin is positive (+).

Richard Crowley · February 17th, 2010, 08:29 AM

I have made several power cords for my EX1 and I can confirm that center pin is positive and outer shell is negative. And the industry-standard 4-pin XLR wiring is 1=negative, and 4-positive with no connection to pin 2 or 3. I actually found one of the RadioShack modular power connectors that fits the my EX1 perfectly.

I once made the mistake of wiring a power cable reversed and plugged in one of my Sony DXC-3000 cameras. Surprisingly, the only casualty was the three op-amp ICs in the Fujinon lens servo circuitry. The main camera body was protected against reverse voltage by the internal DC-DC converter power supply module. The camera circuitry doesn't actually run directly from the nominal 12V coming in from the outside. I also have a DSR-300 and the service manual shows that it has a similar power-handling scheme.

NOTE, however, that the current models may very well have very different power handling schemes than those older models. I don't have any knowledge of the EX1 internals and I would assume that feeding it reverse polarity would FRY it to crispy, smoking cinders.

Shaughan Flynn · February 17th, 2010, 09:58 AM

Thanks, gents. Built my cable last night. Works like a champ.

February 16th, 2010, 01:46 PM	#1
Shaughan Flynn Major Player Join Date: Aug 2005 Posts: 272	12v power connector polarity Anyone know what the polarity of the power connector is on an EX1/3? __________________ B-Scene Films

February 16th, 2010, 03:17 PM	#5
Alex Dolgin Contributor Join Date: Oct 2001 Location: Lexington, Ma Posts: 286	Kevin is correct. The inner pin is plus. HTH __________________ Alex Dolgin Dolgin Engineering Camera DC Power accessories, Fast 4 position Battery Charger http://www.dolgin.net

February 17th, 2010, 05:26 AM	#10
Paul Kellett Trustee Join Date: Nov 2007 Location: Bristol UK Posts: 1,273	Centre pin is definitely positive, i've just made a lead to power my EX1 from the top stage of my Pilot. The lead has been used a coulpe of times, nothing blew up. Centre pin is +. Paul. __________________ Round 2 GH5,FZ2000

February 17th, 2010, 06:39 AM	#11
Piotr Wozniacki Inner Circle Join Date: Aug 2006 Location: Poland Posts: 4,086	Confirmed. __________________ Sony PXW-FS7 \| DaVinci Resolve Studio; Magix Vegas Pro; i7-5960X CPU; 64 GB RAM; 2x GTX 1080 8GB GPU; Decklink 4K Extreme 12G; 4x 3TB WD Black in RAID 0; 1TB M.2 NVMe cache drive

February 17th, 2010, 09:58 AM	#14
Shaughan Flynn Major Player Join Date: Aug 2005 Posts: 272	Thanks, gents. Built my cable last night. Works like a champ. __________________ B-Scene Films

February 16th, 2010, 02:02 PM	#2
Giroud Francois Inner Circle Join Date: Feb 2004 Location: switzerland Posts: 2,133	usually it is written on the power supply

February 16th, 2010, 02:08 PM	#3
Kevin Spahr Major Player Join Date: Feb 2005 Location: Carlisle, PA Posts: 451	The outer shell is negative, pin is positive.

February 16th, 2010, 02:52 PM	#4
Bo Skelmose Major Player Join Date: Apr 2008 Location: Denmark Posts: 495	Check it with a meter from the AC supply. I remember, as if it was a strange choice from SONY. I'm not sure....

February 16th, 2010, 03:51 PM	#6
Bo Skelmose Major Player Join Date: Apr 2008 Location: Denmark Posts: 495	almost certain that pin is minus and shell is positive - i'll check Grabbed this : The EXDC1 4 Pin XLR to DC Adaptor is sold as a "stand alone" product and is simply a "pass through" that meets the polarity standards of the Sony XDCAM EX cameras when used with industry standard 4 Pin XLR power configurations. Due to the fact that this cable is a “pass through” with no voltage regulation, it is the user’s responsibility, when using the EXDC1, to ensure that power sources meet both the polarity and voltage requirements of their camera or equipment. (EXDC1 Specs Pin 4 to Shell, Pin 1 to Tip) 4pin XLR are are pin 1 minus and pin 4 positive !!!!!!!!!!!!!! http://www.filmwareproducts.com/Vort.../VM-EXDC1.html

February 16th, 2010, 04:24 PM	#7
Warren Kawamoto Trustee Join Date: Nov 2006 Location: Honolulu, HI Posts: 1,435	Bo, Your information is wrong. While XLR 4 pin is pin 1=negative and pin 4=positive, on the camera side, center pin is positive, outer shell is negative. I just confirmed this by using a voltmeter on the output. Sony does have a non-standard dc connector, by that they mean it's SHAPE and size is non-standard, not the polarity. Just to be clear to not confuse anyone, center pin is positive, outer shell is negative.

February 16th, 2010, 04:32 PM	#8
Bo Skelmose Major Player Join Date: Apr 2008 Location: Denmark Posts: 495	Great - you have to be 100 % sure before you connect - so now there should not be any problem with this :-) Sorry to have confused you.

February 16th, 2010, 05:36 PM	#9
Paul Hudson Regular Crew Join Date: Jan 2010 Location: Phoenix, AZ Posts: 37	Always check polarity with a multi meter. This is not something you want to make the wrong decision on. The results could be a disaster. Paul Hudson Lizardlandvideo.com Phoenix video production

February 17th, 2010, 08:00 AM	#12
John Hedgecoe Regular Crew Join Date: Dec 2007 Location: Bangkok, Thailand Posts: 146	Yes, center pin is positive (+).

February 17th, 2010, 08:29 AM	#13
Richard Crowley Trustee Join Date: Aug 2007 Location: Portland, Oregon Posts: 1,238	I have made several power cords for my EX1 and I can confirm that center pin is positive and outer shell is negative. And the industry-standard 4-pin XLR wiring is 1=negative, and 4-positive with no connection to pin 2 or 3. I actually found one of the RadioShack modular power connectors that fits the my EX1 perfectly. I once made the mistake of wiring a power cable reversed and plugged in one of my Sony DXC-3000 cameras. Surprisingly, the only casualty was the three op-amp ICs in the Fujinon lens servo circuitry. The main camera body was protected against reverse voltage by the internal DC-DC converter power supply module. The camera circuitry doesn't actually run directly from the nominal 12V coming in from the outside. I also have a DSR-300 and the service manual shows that it has a similar power-handling scheme. NOTE, however, that the current models may very well have very different power handling schemes than those older models. I don't have any knowledge of the EX1 internals and I would assume that feeding it reverse polarity would FRY it to crispy, smoking cinders.