Results 1 to 5 of 5

Thread: Dynon Heated Pitot Installation

  1. #1

    Dynon Heated Pitot Installation

    I'm in the process of replacing my Gretz pitot with the Dynon Heated Pitot.

    According to the installation manual, the status indicator line is open when the pitot heat is applied and goes to ground when the pitot is off.

    My personal opinion is that this is backwards, but there's not much I can do about that. I would prefer that the status line go to ground or go high when heat is on. It's going to be off more than on, so I really only what to annunciate when heat is applied.

    In hopes of not re-inventing the wheel, what would be the best practice to attach the status line to a 4500 for annunciation on one of the input lines? The manual was very verbose on the options. Can the input annunciate when the circuit is open?
    Bob Leffler
    N410BL - RV10 - Flying
    http://mykitlog.com/rleffler

  2. #2
    I believe you can program the operation of the input in the setup menu. From the manual, for active = ungrounded, you'll want to pick "Normally Closed" as the input logic on whichever switched input you wire to.

    Quote Originally Posted by manual page 91
    The Inputs will display the text on the Screen from the SYSTEM.AFD file when an Input is either grounded or open. A normally open or normally closed switch is selectable in the Inputs menu.

    EXAMPLE
    Input #1 is a Normally Closed switch, meaning EFIS will alarm when switch is not grounded
    --
    Joshua Wyatt
    RV-9A N627DW @ KRST - Flying
    4500sEE + 4500sMFD | Stratux Dual-Band, GTN650Xi

  3. #3
    Quote Originally Posted by jwyatt View Post
    I believe you can program the operation of the input in the setup menu. From the manual, for active = ungrounded, you'll want to pick "Normally Closed" as the input logic on whichever switched input you wire to.
    Worked as you described.

    I still feel that it's backwards for an annunciator, but that's not an AFS issue. Having the wire break would also create a situation in which the annunciator would light as well. I really don't want the annunciator lit as Dynon recommends when the heater circuit is off.
    Bob Leffler
    N410BL - RV10 - Flying
    http://mykitlog.com/rleffler

  4. #4
    Does AFS offer red when off, green when on indications?
    Dave Ford
    RV10

  5. #5
    Quote Originally Posted by rvdave View Post
    Does AFS offer red when off, green when on indications?
    The AFS inputs just annunciate when the condition they are programmed for is met. There is no multi-condition status, at least that I'm aware of at the moment.
    Bob Leffler
    N410BL - RV10 - Flying
    http://mykitlog.com/rleffler

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •