adccommunitymod (AutomationDirect) asked a question.

F4-04AD diagnostic LEDs

Created Date: March 13,2007

Created By: Kristjan H

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What do the four diagnostic LEDs on an F4-04AD stand for: TB, 24V, RUN, NEG. When are they lit steady, when do they flicker? Despite the AD documentation and web resources usually being delightfully exhaustive, I found nothing on this.


  • adccommunitymod (AutomationDirect)

    Created Date: March 13,2007

    Created by: FACTSTech

    From 3-13: http://www.automationdirect.com/static/manuals/d4anlg/ch3.pdf

    The TB indicator turns on when the module senses a loose terminal block. The 24V

    indicator turns on when the external 24V supply voltage is low or not connected.

    The RUN LED flashes on and off only if the jumper configuration is valid, and the

    module's internal diagnostics have passed. If the jumper configuration is incorrect

    the RUN LED remains off. During normal operation, the RUN indicator flashes on

    and off continuously at approximately a one second rate. The NEG light turns on if

    the voltage or current input to the selected channel is negative.

    Expand Post
  • adccommunitymod (AutomationDirect)

    Created Date: March 13,2007

    Created by: AZRoger

    Me too. I have started downloading the manual and using Adobe's PDF viewer's search function. For this particular doc, there were 4 hits for "TB ". Three were in pictures and the other was the definition. I never try to find things on my own anymore.

    Roger

  • adccommunitymod (AutomationDirect)

    Created Date: March 13,2007

    Created by: Kristjan H

    What do the four diagnostic LEDs on an F4-04AD stand for: TB, 24V, RUN, NEG. When are they lit steady, when do they flicker?

    Despite the AD documentation and web resources usually being delightfully exhaustive, I found nothing on this.