EFIS-D100 Installation Guide - Dynon Avionics

AP74 MOUNTING
Autopilot Installation and Configuration
As shown in diagram below, make a rectangular cutout (oriented either vertically or horizontally,
depending on instrument version ordered) of 1.45” by 4.75” (3.69 cm by 12.07 cm). Your AP74
also shipped with a life-sized mounting template for making this cutout and locating the optional
mounting flange holes. If the flange is used, secure it to your panel in whatever way you desire.
Riveting it to the panel is ideal, but drilling holes for mounting screws and nuts also works.
Upon locating the mounting bracket behind your panel, slide the instrument into it. The tapered
mounting screw fits into one of the PEM nuts at the back of the mounting bracket. Use the
included 7/64” Allen wrench to secure the mounting screw into the bracket. As you screw the
mounting screw tighter, the unit will be pulled back into the panel until the bezel sits flush. If the
bracket is installed without the assistance of the mounting flange, it will also be drawn forward
into the back of the panel when tightened. Tighten until the flange and bracket are securely
fastened to the panel.
Firmware Upgrades Required For AP Functionality
Because servo and AP74 firmware is upgraded at the same time as the Bus Master EFIS,
servo and AP74 power must be ON when EFIS firmware is upgraded.
To use the Dynon Avionics AP, the EFIS and all other Dynon products in the DSAB network
must be running the same firmware version (currently 5.4). This includes EFIS, EMS (including
those configured as backup/slave units), HS34, AP74, servos, and the EDC-D10A compass.
EFIS, EMS, and HS34 products must be individually upgraded via their individual serial ports
connected to a PC and running the latest version of the Dynon Avionics Product Support
Program. Autopilot servos and the optional AP74 are upgraded as part of the upgrade of
the DSAB Bus Master EFIS (as is the EDC-D10A). To ensure reliable operation, all Dynon
devices should be upgraded to the same version of firmware; mismatched versions of firmware
on different devices can cause unreliable operation.
EFIS-D100 Installation Guide 6-13