GRT Avionics, Inc.
May 2019
Sport SX Install. Manual
19
Rev. A
4-4: Magnetometer Wiring
Typically, the magnetometer cable supplied with the EFIS will not have its D-sub terminals
plugged into the connector housing. This makes it easier to route the cable through the
airplane. After the cable has been routed, the wires can be cut to length if desired (new
terminals will have to be crimped on the wire ends). If the wires are not cut, inspect the
D-sub connector terminals to verify that they have not been damaged. Insert the
designated wire into the appropriate D-sub connector housing position according to
section
A-10: Magnetometer
– Digital and Analog (Legacy)
(indicated by wire color). If
desired, the crimp-type D-sub connector can be replaced with a solder-type connector.
All magnetometer connections are made directly to the mating display unit with internal
AHRS. This wiring includes the power connections necessary for the magnetometer to
operate.
SX200A Only:
The digital magnetometer serial output may be shared between any
number of the Mini-X, Mini-AP and any Adaptive AHRS.
SX200 Legacy Only:
Each AHRS and magnetometer pair is calibrated together at the
factory for optimal accuracy, and this pairing should be maintained for the best
performance.
4-5: Specific Equipment Interconnect Details
Most equipment shares information with the EFIS via a serial port connection. Each serial
port in the EFIS that is wired to another device must be configured so that the EFIS knows
what it has been connected to. This is accomplished via the “Set Menu,” within the
“General Setup” menu. Each serial port is listed and entries are provided that allow them
to be configured for a wide variety of functions. Since all serial ports on the Sport SX are
high-speed, they are capable of receiving data at 115,200 baud and can be used for any
function.
Detailed instructions and wiring information for connecting to specific other avionics
equipment, along with EFIS pinout information, are provided in the
Appendix
, as well as
being
provided
as
Equipment
Supplements
on
GRT’s
website
www.grtavionics.com/home/compatible-equipment/
).
Depending on the other equipment installed in the airplane, switches may be necessary
or desirable for some functions. For example, a switch to allow the autopilot to be
controlled by the EFIS, or directly from the GPS, allows the GPS to control the autopilot
in the event that the autopilot-controlling display unit fails.
