05-31-2016, 07:30 PM
I am a Dreamstation user and eager to do some camping. I went to buy battery equipment for the Dreamstation and I am confused. I see two options:
Option A) On some websites, I see a plain DC-power "cigarette lighter" cable with what looks like some filtering chokes.
Option B) On other websites I see information saying that the Dreamstation needs a proprietary signal from the power supply, and they are selling a cable with what looks like a DC/DC converter and a fan at about 3x the cost of the Option 'A' cable.
It is not an inverter. I specifically checked and the Dreamstation is 12V DC in. Is it some sort of voltage regulator to exactly 12V DC or does it buck the voltage up as the battery discharges?
What gives? I don't want to toast the machine with the wrong cable. Just trying to get 2 nights of use before a recharge.
06-01-2016, 12:54 AM
(This post was last modified: 06-01-2016, 01:34 AM by sdb7802.)
The DreamStation uses a 3 conductor plug for dc power input. It has an outer barrel (+12V), an inner barrel (common), and a center pin (100k ohm resistor to +12V). The center pin provides the proprietary signal. The plug itself is the same type used on the ResMed A10 except the DreamStation uses a right angle plug.
Option A has the 100k resistor on the center pin and 2 monster-ass ferrite beads. I own one. It is different from the cable for the PR System One which has a different plug.
Option B looks like a non-inverting buck/boost converter that's designed to be fed from a lithium battery pack. As you said, it probably provides a stable 12V as the battery discharges. It probably has the same 100k resistor on the center pin. I don't own one of these, but I did look at the instruction pdf. I think there's a thread on the forum about the battery pack. Could be wrong.
I'm currently using a UPS for standby power on my DreamStation. Haven't gotten around to configuring a battery setup.
Just my personal opinion. My posts are not medical advice or a statement of fact. Please consult a qualified physician or other qualified medical personnel. Please comply with all applicable laws, codes, regulations, and protocols.