Part #: MD41-634
Model: MD41634
Part Number :
Select part number above to view pricing and availability.
| Price | Condition | Status | |
|---|---|---|---|
| REQUEST | NEW OUTRIGHT | REQUEST |
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* Price & Availability valid as of 10/27/20 10:41:50 EDT *
MD41
FEATURES
- Interface and annunciation device that combines navigation source switching to pilot's primary CDI or HSI with key GPS selection and annunciation functions
- Transfers Navigation display between VOR/LOC and approach certified GPS systems
- Provides up to 19 user defined relay poles
- TSO C129 Approved to meet NEW FAA field approval requirements
- Lighted push buttons and daylight readable annunciators
- Push-button lighting level is controlled by the instrument lighting rheostat
- Annunciator lighting is automatically dimmed by means of a photocell feedback circuit
- Available in Horizontal or Vertical configuration
- Available with 5, 14, or 28 Volt lighting
- Available for most GPS manufacturers (see table below)
SPECIFICATIONS
| Dimensions (typical): | 3.50"W x 1.350"H x 4.625"D | Weight: | 0.75 lbs. |
| RTCA: | DO-160C, DO-208 | Altitude: | certified to 55000 ft. |
| Left-Right Meter: | DC resistance: 1000 ohms +- 50 ohms | Current Rating: | zero center |
| Part Number | Annunciator Control Unit Description: |
|---|---|
| MD41-324 | 14VDC, Horizontal Mount, For Use With KLN-90B |
| MD41-328 | 28VDC, Horizontal Mount, For Use With KLN-90B |
| MD41-3285V | 5VDC, Horizontal Mount, For Use With KLN-90B |
| MD41-334 | 14VDC, Vertical Mount, For Use With KLN-90B |
| MD41-338 | 28VDC, Vertical Mount, For Use With KLN-90B |
| MD41-3385V | 5VDC, Vertical Mount, For Use With KLN-90B |
| MD41-424 | 14VDC, Horizontal Mount, For Use With GPS-155/165- same as Garmin P/N 013-00029-01 |
| MD41-428 | 28VDC, Horizontal Mount, For Use With GPS-155/165- same as Garmin P/N 013-00029-00 |
| MD41-4285V | 5VDC, Horizontal Mount, For Use With GPS-155/165- same as Garmin P/N 013-00029-02 |
| MD41-434 | 14VDC, Vertical Mount, For Use With GPS-155/165- same as Garmin P/N 013-00029-06 |
| MD41-438 | 28VDC, Vertical Mount, For Use With GPS-155/165- same as Garmin P/N 013-00029-05 |
| MD41-4385V | 5VDC, Vertical Mount, For Use With GPS-155/165- same as Garmin P/N 013-00029-07 |
| MD41-444 | 14VDC, Horizontal Mount, For Use With GPS-155XL/GNC300/GNC300XL- same as Garmin P/N 013-00029-11 |
| MD41-448 | 28VDC, Horizontal Mount, For Use With GPS-155XL/GNC300/GNC300XL- same as Garmin P/N 013-00029-10 |
| MD41-4485V | 5VDC, Horizontal Mount, For Use With GPS-155XL/GNC300/GNC300XL- same as Garmin P/N 013-00029-12 |
| MD41-454 | 14VDC, Vertical Mount, For Use With GPS-155XL/GNC300/GNC300XL- same as Garmin P/N 013-00029-16 |
| MD41-4585V | 5VDC, Vertical Mount, For Use With GPS-155XL/GNC300/GNC300XL- same as Garmin P/N 013-00029-17 |
| MD41-458 | 28VDC, Vertical Mount, For Use With GPS-155XL/GNC300/GNC300XL- same as Garmin P/N 013-00029-15 |
| MD41-524 | 14VDC, Horizontal Mount, For Use With KLN-89B/KLN-94 |
| MD41-528 | 28VDC, Horizontal Mount, For Use With KLN-89B/KLN-94 |
| MD41-5285V | 5VDC, Horizontal Mount, For Use With KLN-89B/KLN-94 |
| MD41-534 | 14VDC, Vertical Mount, For Use With KLN-89B/KLN-94 |
| MD41-538 | 28VDC, Vertical Mount, For Use With KLN-89B/KLN-94 |
| MD41-624 | 14VDC, Horizontal Mount, For Use With Trimble 2000/2101 IFR GPS |
| MD41-628 | 28VDC, Horizontal Mount, For Use With Trimble 2000/2101 IFR GPS |
| MD41-6285V | 5VDC, Horizontal Mount, For Use With Trimble 2000/2101 IFR GPS |
| MD41-634 | 14VDC, Vertical Mount, For Use With Trimble 2000/2101 IFR GPS |
| MD41-638 | 28VDC, Vertical Mount, For Use With Trimble 2000/2101 IFR GPS |
| MD41-6385V | 5VDC, Vertical Mount, For Use With Trimble 2000/2101 IFR GPS |
| MD41-724 | 14VDC, Horizontal Mount, For Use With Apollo/Garmin AT 2001/2101/GX50/GX60 |
| MD41-728 | 28VDC, Horizontal Mount, For Use With Apollo/Garmin AT 2001/2101/GX50/GX60 |
| MD41-734 | 14VDC, Vertical Mount, For Use With Apollo/Garmin AT 2001/2101/GX50/GX60 |
| MD41-738 | 28VDC, Vertical Mount, For Use With Apollo/Garmin AT 2001/2101/GX50/GX60 |
| MD41-824 | 14VDC, Horizontal Mount, For Use With Northstar M3 |
| MD41-828 | 28VDC, Horizontal Mount, For Use With Northstar M3 |
| MD41-834 | 14VDC, Vertical Mount, For Use With Northstar M3 |
| MD41-838 | 28VDC, Vertical Mount, For Use With Northstar M3 |
| MD41-9285V | 5VDC, Horizontal Mount, For Use With KLN-900 |
| MD41-928 | 28VDC, Horizontal Mount, For Use With KLN-900 |
| MD41-9385V | 5VDC, Vertical Mount, For Use With KLN-900 |
| MD41-938 | 28VDC, Vertical Mount, For Use With KLN-900 |
MD41-634
- Annunciator Control Unit
| Price | Condition | Status |
|---|---|---|
| REQUEST | NEW OUTRIGHT | REQUEST |
Click on a question below to see the answer. If you have a question about this model that is not answered below, please contact questions@seaerospace.com
What is the main difference between the versions of Mid-Continent MD41 annunciators available?
A normal Annunciator Control Unit (ACU) includes a control and relay assembly. The control portion includes lighted annunciations (words) as well as a switch assembly to activate a relay. The relay assembly provides the electrical transfer of information between a conventional nav (VOR/ILS/GS) and GPS to one Course Deviation Indicator (CDI).
The ACU units can be complete with control and relay built into one assembly or they can be separated depending on the part number. Some GPS systems and CDIs include internal relays. Therefore, only a control with switch is required. In this case, you would only purchase the Control Head. Some installations use different custom sizes and styles of annunciator switches. Therefore, in this case, only a remote relay is purchased without a control assembly.
In addition to variations in switches, relays, and sizes, ACUs are engineered to be compatible with specific GPS systems by different manufacturers. Variations in power input and bezel orientation are available as well.
The ACU units can be complete with control and relay built into one assembly or they can be separated depending on the part number. Some GPS systems and CDIs include internal relays. Therefore, only a control with switch is required. In this case, you would only purchase the Control Head. Some installations use different custom sizes and styles of annunciator switches. Therefore, in this case, only a remote relay is purchased without a control assembly.
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In addition to variations in switches, relays, and sizes, ACUs are engineered to be compatible with specific GPS systems by different manufacturers. Variations in power input and bezel orientation are available as well.
What is the function and reason for annunciators required in an IFR GPS installation?
For IFR GPS approach certification, GPS status annunciations are required to be in the pilot's field of view. These annunciations (or lights) indicate active switches such as the NAV/GPS and OBS (if applicable) modes. Other annunciations or alerts might include the following:
TERM - light that will signal pilot when operating within 30 miles of departure or arrival airport (i.e. Terminal area)
APR - light that signals pilot when the GPS is engaged in Approach mode
MSG - light that signals pilot that the GPS has generated a Message alert that should be viewed on the GPS
WPT - light that signals pilot that the GPS has generated a Waypoint alert that should be viewed on the GPS
INTG - light that will signal pilot when the GPS receiver detects a position error or is unable to calculate the Integrity of the position
Some annunciator units and annunciator control units or ACUs have a variety a these switches and annunciators depending on the GPS system to be interfaced with or the aircraft installation. However, there are certain annunciations such as MSG and WPT that are standard for all annunciators required.
TERM - light that will signal pilot when operating within 30 miles of departure or arrival airport (i.e. Terminal area)
APR - light that signals pilot when the GPS is engaged in Approach mode
MSG - light that signals pilot that the GPS has generated a Message alert that should be viewed on the GPS
WPT - light that signals pilot that the GPS has generated a Waypoint alert that should be viewed on the GPS
INTG - light that will signal pilot when the GPS receiver detects a position error or is unable to calculate the Integrity of the position
Some annunciator units and annunciator control units or ACUs have a variety a these switches and annunciators depending on the GPS system to be interfaced with or the aircraft installation. However, there are certain annunciations such as MSG and WPT that are standard for all annunciators required.
