Garmin GMA 347, Руководство по установке

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GMA 347 Installation Manual Page 3-7
190-00325-01 Revision A
4. At the same end of the shielded cable (4) and ahead of the previous shield termination, strip back
“Float Min” to “Float Max” (Table 3-5) length of jacket and shield to expose the insulated center
conductors. (See Figure 3-2). It may be best to build the “Ideal Float” length optimally.
Preferred Method:
The jacket and shield should be cut off at the same point so no shield is exposed. Slide 0.75” minimum of
Teflon heat shrinkable tubing (7) onto the cable and use a heat gun to shrink the tubing. The chosen size
of heat shrinkage tubing must accommodate the number of conductors present in the cable
Secondary Method:
Leave a max 0.35” of shield extending past the jacket. Fold this 0.35” of shield back over the jacket.
Slide a solder sleeve (7) over the end of the cable and use a heat gun approved for solder sleeves to secure
the connection. The chosen size of solder sleeve must accommodate the number of conductors present in
the cable.
5. Strip back 1/8” of insulation and crimp a pin (8) to each of the conductors in the shielded cable.
6. Insert newly crimped pins and wires into the appropriate connector housing location as specified by
the installation wiring diagrams.
7. Cut the Flat Braid (6) to a length with the addition of a ring terminal that will reach one of the tapped
holes of the Shield Block (2). (See Figure 3-1). An appropriate amount of excess length without
looping should be given to the Flat Braid (6) to allow it to move freely with the wire bundle. Note
that the maximum distance from the backshell allowed for the window splice should keep the Flat
Braid (6) to a worst case length of approximately 4”.
8. Guidelines for terminating the newly cutoff Flat Braid(s) (item 6) with insulated ring terminals (9):
•
Each tapped hole on the Shield Block (2) may accommodate only two ring terminals (9).
•
It is preferred that only two Flat Braids (6) be terminated per ring terminal. Two Flat Braids per
ring terminal will necessitate the use of a Ring terminal, #8, insulated, 14
-
16 AWG
(MS25036
-
153).
•
If only a single Flat Braid is left or if only a single Flat Braid is need for this connector, a Ring
terminal, #8, insulated, 18
-
22 AWG (MS25036
-
149) can accommodate this single Flat Braid.
•
If more braids exist for this connector than two per ring terminal, it is permissible to terminate
three braids per ring terminal. This will necessitate the use of a Ring terminal, #8, insulated,
10
-
12 AWG (MS25036
-
156).
•
In rare situations where more braids need to be terminated for this connector than three per ring
terminal it is allowable to daisy chain a maximum of two shields together before coming to the
ring terminal. (See Figure 3-3).