Mounting; Wiring/Cabling Considerations; Table 1-5 Pin Contact And Crimp Tools Part Numbers - Garmin GDU 37X Installation Manual

1.5 Mounting

Refer to Section 2 and Section 3
and to Appendix C for Outline & Installation Drawings.

1.6 Wiring/Cabling Considerations

Use MIL-W-22759/16 (or other approved wire) AWG #24 or larger wire for all connections unless
otherwise specified. The standard pin contacts supplied in the connector kit are compatible with up to
AWG #22 wire. In cases where some installations have more than one LRU sharing a common circuit
breaker, sizing and wire gauge is based on aircraft circuit breaker layout, length of wiring, current draw on
units, and internal unit protection characteristics. Do not attempt to combine more than one unit on the
same circuit breaker.
RG400 or RG142 coaxial cable with 50 Ω nominal impedance and meeting applicable aviation regulations
should be used for the installation.
1.6.1 Wiring Harness Installation
Allow adequate space for installation of cables and connectors. Ensure that routing of the wiring does not
come in contact with sources of heat, RF or EMI interference. Analog Input wires routed too close to
spark plugs, plug wires, or magnetos may result in erratic readings.
The installer shall supply and fabricate all of the cables. The connector is available in the GDU 37X
Connector Kit (011-01921-00). Electrical connections are made through D subminiature connectors for
the GDU 37X units. Appendix A
Required connectors and associated hardware are supplied with the connector kit.
CAUTION
Check wiring connections for errors before connecting any wiring harnesses.
Incorrect wiring could cause internal component damage.

Table 1-5 Pin Contact and Crimp Tools Part Numbers

Contact
LRU
Type
Socket,
GDU 37X Mil Crimp,
Size 20
Non-Garmin part numbers shown are not maintained by Garmin and consequently are subject to change
without notice.
190-01054-01
Rev. D
for specific mounting instructions for each component of the GDU 37X,
defines the electrical characteristics of all input and output signals.
Garmin
Recommended
Contact Part
Positioner
Number
M22520/2-08,
336-00094-00
Daniels K13-1
Recommended Recommended
Insertion/ Hand Crimping
Extraction Tool
M81969/1-04 for
size 22D pins
and M22520/2-01
M81969/1-02 for
size 20 pins
GDU 37X Installation Manual
Tool
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