power supply of USB-6346

[SebNI]

Hello Everyone,

I have to replace an old system, which uses a Daqcard 6062e (PCMCIA).

I was thinking about to chose the USB-6346 which has similar characteristics, but i have a doubt concerning the power supply og this device, especially after reading the manual : "The USB-6346 must be powered with an AC adapter offered by NI or a National Electric Code (NEC) Class 2 DC source that meets the power requirements for the device and has appropriate safety certification marks for country of use"

Does it mean that it's absolutely not possible to power the device only with the USB bus of a laptop? If answer is "Yes", I will have to choose an other device, cause the system will be used in a test environment without any external source of energy at some very specific moments (in a trainset, with main circuit breakers open and so, no energy excepted the battery of the laptop...

thanks in advance for you answers.

[johndoe_student]

I'm using an USB-6343 which is similar for yours.

I have a power line to outlet and a signal line to usb. It means USB-6343 doesn't work with usb bus.

how about using a UPS?

[SebNI]

Hello,

Thanks for this feedback. 

I finally decided to use something different : USB Cdaq