Respironics DC power connectors
Posted: Thu Sep 08, 2011 6:14 pm
I bought some DC connectors for my Respironics CPAP machines.
They are 2.5 mm ID, 5.5 mm OD barrel connectors. The tip is positive. This is also referred to as a “size N coaxial DC power connector.”
Tip/center conductor/pin = positive.
Barrel/outer conductor = negative.
Some ResMed machines may use the same connector, but are reversed polarity. ResMed claims you must use their DC-DC converter. Don't plug the cable into the wrong machine.
I can confirm they fit the Repironics PRS1, M Series and Legacy CPAP machines.
I ordered from DigiKey. Good company to buy from.
Part number CP3-002BH-ND $1.79 each fits all three machines perfectly. I haven't actually soldered wires and powered it up yet, though.
Part number CP-2200-ND $3.42 each fits the M series and PRS1 machines fine. It doesn't fit well into the legacy REMstar machine. It makes connection, but tends to fall out. The uninsulated part of the barrel is a little longer on the connector that fits and on the official Respironics DC cable.
I like the CP-2200 ND connector a little better because it's a preassembled molded connector with a 6 foot 18 gauge wire. Sometimes, it's difficult to make a good, neat solder connection to those small connectors. It's also right angle with a strain relief. For my particular project, it should work out well.
Something feels a little chintzy about the Respironics connectors. On one of my PRS1 machines, the original manufacturer's plug loses contact with the machine and power drops out if you wiggle it the slightest bit. It doesn't fall out, it just doesn't make contact. Strangely enough, it's never actually failed to work during actual use, though.
They are 2.5 mm ID, 5.5 mm OD barrel connectors. The tip is positive. This is also referred to as a “size N coaxial DC power connector.”
Tip/center conductor/pin = positive.
Barrel/outer conductor = negative.
Some ResMed machines may use the same connector, but are reversed polarity. ResMed claims you must use their DC-DC converter. Don't plug the cable into the wrong machine.
I can confirm they fit the Repironics PRS1, M Series and Legacy CPAP machines.
I ordered from DigiKey. Good company to buy from.
Part number CP3-002BH-ND $1.79 each fits all three machines perfectly. I haven't actually soldered wires and powered it up yet, though.
Part number CP-2200-ND $3.42 each fits the M series and PRS1 machines fine. It doesn't fit well into the legacy REMstar machine. It makes connection, but tends to fall out. The uninsulated part of the barrel is a little longer on the connector that fits and on the official Respironics DC cable.
I like the CP-2200 ND connector a little better because it's a preassembled molded connector with a 6 foot 18 gauge wire. Sometimes, it's difficult to make a good, neat solder connection to those small connectors. It's also right angle with a strain relief. For my particular project, it should work out well.
Something feels a little chintzy about the Respironics connectors. On one of my PRS1 machines, the original manufacturer's plug loses contact with the machine and power drops out if you wiggle it the slightest bit. It doesn't fall out, it just doesn't make contact. Strangely enough, it's never actually failed to work during actual use, though.