Garmin G5 Installation Manual page 221

A.2.2 Aircraft Power
The GMU 11 operates using power from one 14 / 28 VDC input. Pin 8 (AIRCRAFT POWER 2) is not
used as a part of this STC.
NOTE
AIRCRAFT POWER 2 is for connecting to an alternate power source, such as on aircraft with
two electrical buses.
A.2.3 RS-232
RS-232 is not used or approved for use by this STC.
A.2.4 CAN Bus
The GMU 11 CAN bus conforms to the BOSCH standard for Controller Area Network (CAN) 2.0-B
and ISO 11898. See Section 3.4.5.2 for details. The CAN bus connection on the GMU 11 is used to
connect the GMU 11 to one or two G5s, a GAD 29/29B, and a GAD 13.
For specific wiring information, refer to Section 5.
A.2.5 Unit ID
The GMU 11 detects its assigned unit type at startup by checking the UNIT ID pin. Only one GMU 11
may be installed by this STC. Ensure pin 3 is not connected to allow the GMU 11 to properly detect its
assigned unit type.
Unit ID
GMU 11 #1
GMU 11 #2 (Not Used)
Garmin G5 Electronic Flight Instrument Part 23 AML STC Installation Manual
Unit ID Configurations
Pin 3 No Connection
Ground pin 3 (Not Used)
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Page 221
Comment
190-01112-10
Rev. 21