Devices that provide large amounts of data at high baud rates (38400+), such as ADS-B receivers or
XM weather will function through the combiner, but could exceed the capacity of the combiner and
reduce the available data that could be passed through the other serial ports. For this reason, high data
rate devices must be wired directly to the display unit to avoid data loss.
Installation
Mounting holes are provided in the four corners of the case for #8 flat head screws. Two screws are
sufficient when located in opposite corners for most installations. The module can be mounted in any
orientation. Typically, the unit is mounted in the forward part of the airplane so its antenna can be
positioned on the glare shield, and so it is near the GRT EFIS display units. The module should not be
exposed to water, or in a location where it is likely to get wet, or where temperatures will exceed 150
deg F when in normal operation.
The Safe-Fly includes threaded holes for 4-40 screws to allow mounting of the Uavionx EchoUAT.
This simplifies the installation and reduces the number of devices that must be mounted.
To further simplify the installation, the Horizon and Sport 10.1 EFIS allow the Safe-Fly GPS to be
mounted to the rear of the EFIS using 8-32 x ¾” screws. Caution: Do not exceed 1” long screws to
avoid damaging the EFIS internal PC board.
Wiring
The Safe-Fly GPS will operate with or without a connection to a GRT EFIS. In most cases it will be
wired to a GRT EFIS to supply the EFIS with GPS data, and allow the use of the 3 serial ports on the
module. (The serial data from these ports is combined into the one serial data stream to the EFIS,
along with the GPS data, and transmitted to the EFIS via the Serial Control Out pin.) Typical wiring is
illustrated at the end of this manual.
Power and Ground
Power
– Power must be provided to at least one of the three power inputs on pins 23,24,25. +9-32VDc
is required at 0.2A maximum. These inputs are isolated, and multiple power inputs can be used for
redundancy.
Ground
- One ground connection is recommended, to any of the provided ground pins.
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Safe-Fly 2020 GPS – Rev P GRT Avionics, Inc
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