The Respironics DC Cord has a 12 VDC plug with Positive Polarity, or sometimes called Positive Hot. That is the tip of the cigarette lighter connector is in contact with the positive polarity of the car or battery, and is transmitted to the inside of the barrel connector at the machine.
Cord Length: 6 Ft
Barrel Connector
Note: Will function with the System One 60 Series, but will not fit the System One 50 Series due to the design change required when the Heated Tube was added to the PR1 60 Series.
The Respironics System One has two different series. The PR1 50 Series was introduced in 2010 and the PR1 60 Series was introduced in 2012. The PR1 50 Series has a white face while the PR1 60 Series has a darker gray face. The PR1 60 Series has raised lettering on the lower top of the machine as well. You can also check the model number on the bottom of the CPAP machine. Model numbers will contain either 50 or 60.
