Can Bus Termination (011-02887-00) For Gad 29, Gea 24, And Gsu 25; Can Bus Termination For Gsa 28; Can Bus Termination For Gdu 37X And Gsu 73 - Garmin G3X Installation Manual

The following items should be considered when installing/removing/replacing LRU's on the CAN bus:
1. CAN bus node connections must be made on the connector of each LRU that connects to the CAN
bus, do not tie CAN bus nodes from individual LRUs together into a single connection point.
2. Keep all node lengths as short as practicable, and allow only one 'lengthy' node if possible.
3. If a GAD 29, GEA 24, and/or GSU 25 unit (that was used as a CAN bus termination) is removed,
the CAN bus will remain terminated as long as the CAN bus terminator (Figure 2-4) is left
connected.
4. If a GDU 37X and/or GSU 73 unit (that was used as a CAN bus termination) is removed, the CAN
bus will be unusable until the CAN bus is properly terminated at both ends of the 'backbone'
(Figure 2-3).
5. A removal adapter (GPN 011-03158-00) is provided (with each GSA 28 connector kit) that can be
used when a GSA 28 is removed. The adapter keeps that node on the CAN bus in the same state as
when the servo was connected (either terminated or un-terminated). The adapter also allows trim
signals to pass through when the servo is removed.
6. Based on preceding points 2-4, it is recommended that CAN bus terminations are placed at a
GAD 29, GEA 24, GSA 28, GSU 25 unit, if possible.
NOTE
The 120 Ω termination resistors described in the preceding paragraphs are "built-in" to
the termination methods shown in the following figures. Do not install a separate
"discrete" 120 Ω resistor to terminate the CAN bus in addition to the termination
methods shown in Figure 2-4, Figure 2-5, and Figure 2-6.
GARMIN CAN TERMINATOR
Figure 2-4. CAN Bus Termination (011-02887-00) for GAD 29, GEA 24, and GSU 25
Figure 2-5. CAN Bus Termination for GDU 37X and GSU 73
GSA 28 PITCH SERVO
CAN_TERM_1
CAN_TERM_2
190-01115-01
Rev. L
3
4
Figure 2-6. CAN Bus Termination for GSA 28
NOTE: JUMPER (BETWEEN PINS 3 & 4) REQUIRED
WHEN GSA 28 IS LOCATED AT END OF CAN BUS
G3X Installation Manual - Installation Preparation
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