Error 50405 - USB 6008 OEM.

[VeeJay]

Hi everyone,

Occurs on a digital output line daqmx. I am trying to use 5VDC from digital output to energize a solid state relay D2425 (Crydom) to control a 120VAC 1/3 HP motor. I am able to turn the motor ON using task generated on MAX, but when I try to turn OFF I get the error - 50405 DAQ Assistant error.

I have tried using a different USB port but didn't help. I removed all other USB devices as well. The DAQ card is the only USB device; so not being able to source power from the computer shouldn't be an issue.

The SSR has it's inputs and outputs very well isolated. Could there be any other issue?

V

[Seth_B.]

How close is the motor to the 6008?  The EMF from a near-by motor may be inducing enough noise on the USB lines to interrupt USB communication.  Are you doing anything to shield the 6008 OEM from the motor?