DC-Powered 4-Port USB Hub CNX-P5USB (12v and 24v systems)

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Price: $129.95   

Product Feature

• Internal DC-DC Regulator Accepts 7-32 Volts
• Battery Overvoltage & Surge Protection
• Designed specifically for automotive use- Unit powers on and off with Ignition Status
• Survives Engine Cranking Voltage Fluctuation
• Delayed Shutdown Jumper Selectable 5 minutes or 25 minutes

Product Description

The CarNetix CNX-P5USB is a DC-powered 4-port USB hub designed for automotive or embedded DC-powered applications. The P5USB includes and internal DC-DC regulator so that each of the 4 USB ports can provide up to 500mA of current to the downstream USB devices. The P5USB can be used in either a +12V or +24V automotive environment. It will operate down to 7V (survives engine cranking) and can withstand voltage transients typically found in a harsh automotive environment. The DC input includes reverse polarity protection, transient suppression, and an internal in-line, self-resetting fuse. A self-locking power cable is included. The P5USB can be turned ON or OFF either by the car's ignition line or by sensing the presence of +5V on the upstream host USB device (PC). This helps prevent battery discharge when the PC is left in Standby for extended periods of time. The P5USB includes an Shutdown Delay jumper which can be set to allow the P5USB to remain on for either 5 minutes or 25 minutes after the Ignition is turned off. This prevents the loss of USB connectivity during short stops if the PC is left running. The CNX-P5USB can be used in a variety of automotive, embedded, marine, mobile, or industrial applications that require the use of a DC power source (ie battery, solar). The internal DC-DC converter can stabilizes a source voltage from as low as 7 volts up to 32 volts and provide a clean +5V output for the connected USB devices. Each downstream USB port is independently current limited and provides an LED indication of USB enumeration. The P5USB comes in a compact plastic enclosure that measures 5.12" x 2.84" x 1.1" and includes mounting tabs. The P5USB does require a USB input voltage to be recognized (i.e. plugged into a computer) to turn on.

DC-Powered 4-Port USB Hub CNX-P5USB (12v and 24v systems) Review

I viewed the You Tube demonstration video on this product before I ordered it. The concept and design is ideal, but not the unit I received. I installed it on 9/23; it would not power-up in USB mode. In IGN mode it powered-up, but none of the 4 ports would energize. I sent store@mp3.com an e-mail with a description of my problem on 9/24. They promptly replied to ask what my input voltage was, and had I checked that with a meter. I sent them a detailed reply, and that has not yet been answered.
I would like to talk in person with them, but they seem to have only an e-mail address.

I just now, 12:41 on 9/25 received this: "RE: [Ticket#768-7481] It does sound like your unit is defective (although this is extremely rare), especially since there is no power through the outbound USB ports when either the ACC wire has +12V or the input USB port has power. Please use Amazon's return process as they'll refund the purchase price as soon as they receive the defective item back. Amazon requires us to direct all returns to them if the order was placed on their site. "
I returned item to Amazon who will refund, but not replace. Their price had now gone up $20.00. The seller. mp3car(Stephen) was wonderfully cooperative: sold me a new one directly at the original Amazon cost and shipped it 2-day! Received 9/27. Restores one's faith in mankind's better nature!

The replacement unit has been functioning fine for the past three months.

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