Control Head-To-Radio Can Cable Connections - Harris M7300 Installation And Product Safety Manual

MM-014763-001, Rev. E
8.3.2.2 Using the Standard U-Shaped Mounting Bracket
If the standard U-shaped mounting bracket will be used to mount the control head, the following
mounting procedure is recommended. As listed in Table 4-4 on page 22, this bracket is item 2 in the
Installation Kit.
1. Using the mounting bracket as a template, mark and drill mounting holes into the mounting surface as
required. The round and elliptical holes in the bracket's vehicle mounting surface are symmetrical, so
forwards/backwards positioning is not important during this step. However, positioning is important
in the next step.
CAUTION
2. Postion the bracket at the mounting surface so the two round holes in its two side "ears" are nearest to
the normal location of the operator (typically towards the rear of the vehicle) and the two slotted holes
are furthest from the normal location of the operator (typically towards the front of the vehicle).
3. Install and tighten the mounting screws. Screws for mounting the bracket to the mounting vehicle's
surface are not included, as all installations differ. Self-threading screws are recommended. Use of
self-drilling screws may cause damage to some mounting surfaces, such as a plastic dash panel.
4. Verify the bracket is held firmly to the mounting surface. Firm mounting prevents unreasonable
vibration, which could damage the control head and/or cause its cable connections to loosen.
5. Slide the control head into the bracket, placing the two pegs protruding from its left and right sides
into the respective round holes in the bracket's two side "ears."
6. In each side "ear" of the mounting bracket, start a #8-32 hex-socket-head cap (Allen) head screw with
a lockwasher and a flat washer by inserting the screw through the slotted hole in the bracket and then
into the threaded hole in the side of the control head. This hardware is included with Mounting
Bracket Kit. The lockwasher should be adjacent to the screw head and the flat washer should be
adjacent to the bracket. Turn each screw clockwise as observed from the head of the screw.
7. The control head can be positioned at various angles for best display viewing at the normal position
of the operator. As necessary, turn it on the pegs to a good position and tighten both screws using an
⅛-inch hex key (Allen) wrench until the control head is held firmly in place. Do not over-tighten.
8.3.2.3 Using the Mounting Pedestal (Optional)
An optional Mounting Pedestal, part number MACDOS0012, may be purchased separately to replace the
standard U-shaped mounting bracket. This pedestal can be attached to the bottom of the control head as
shown in Figure 8-9, and then mounted to a mounting surface below the two. It can also be attached to the
top of the head and then mounted to a mounting surface above the two.
8.3.3

Control Head-to-Radio CAN Cable Connections

8.3.3.1 General Information
A remote-mount radio installation requires a CAN cable between every two "CAN devices" and CAN
terminators on each end of the CAN link. The M7300 mobile radio is considered a CAN device, and each
CH-721 control head in the installation is also considered a CAN device. Figure 8-10 illustrates CAN
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Before drilling holes and/or installing mounting screws, verify these operations will not
damage or interfere with any existing vehicle component (the fuel tank, a fuel line, the
transmission housing, existing vehicle wiring, etc.). Always check to see how far the
mounting screws will extend below the mounting surface prior to installation. Always
deburr drilled holes before installing screws.