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[Equipment] 12VDC adapter
#11
(10-05-2012, 10:16 PM)archangle Wrote: It's 24VDC. Look on the label for the power brick.

There's a third wire, though.

Consensus seems to be that the third wire tells the blower unit which power supply it's attached to, so it knows whether it can power the humidifier and/or heated hose.

Speculation is that it may be "interlocked" to keep you from using a non-ResMed power supply, but nobody's come up with any details.

Has anyone put a voltmeter on it to confirm that two of the wires are positive 12 V and the third wire is neutral?

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#12
(10-06-2012, 12:16 PM)Sleepster Wrote: Has anyone put a voltmeter on it to confirm that two of the wires are positive 12 V and the third wire is neutral?

Do you mean 24V?

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#13
(10-06-2012, 07:21 PM)archangle Wrote:
(10-06-2012, 12:16 PM)Sleepster Wrote: Has anyone put a voltmeter on it to confirm that two of the wires are positive 12 V and the third wire is neutral?
Do you mean 24V?

Yes. 24 V.
Sleepster
Apnea Board Moderator
www.ApneaBoard.com


INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
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#14
(10-05-2012, 06:41 PM)Bernie Wrote: I'm aware of the 12V/120V inverter method, but wanted to avoid the extra losses in the conversion process. Actually, the main thing I wanted to know is the actual output voltage under load of the larger ResMed power brick. I guess I'll just have to measure it myself.
Thanks for the reply.

I have one of the 12v S9 power bricks. It comes with an accessory adapter that will allow you to clip onto a car battery. I will look at it to see if there are any extra details on it.
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