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Installation 9
Cable requirements
You need to consider the following points before installing the system
cables:
• You need to connect the scanner to the display unit and power. The
cable required will depend on the display unit and scanner type.
• All cables should be adequately clamped and protected from physical
damage and exposure to heat - avoid running cables through bilges or
doorways, or close to moving or hot objects.
• Acute bends must be avoided.
• Where a cable passes through an exposed bulkhead or deckhead, a
watertight gland or swan neck tube should be used.
• Avoid cutting and rejoining cables. If this cannot be avoided refer to
Extending the power cable on page -11.
Scanner cables
A radome scanner connected to a C or E-Series display receives power via
the display unit.
Running the cable to the scanner
DO NOT pull the cable through bulkheads using a cord
attached to the connector. This could damage the
connections.
The cable entrance is at the rear of the scanner unit. If the unit is mounted
on a hollow mast, the cable may be run inside the mast and fed though the
unit’s cable entrance. Make sure that the cable does not chafe where it
enters and exits the mast.
To minimize electrical interference try to avoid running radar cables near
other on board electrical equipment. It is also good practice to avoid
running radar cables in parallel with power cables.
Inter-unit cables
The inter-unit cable, illustrated below, is fitted with an 8-way plug and
power cores (covered with a clear protective sleeve) for connecting to the
scanner.
The length of the cable supplied should be sufficient to complete the cable
run on most small boats. For longer runs, additional or replacement cables
are available. These cables have four power cores to minimize voltage
drops over the longer cable run.
Optional cable lengths available are:
• Part No. M92668 - 15 m heavy extension cable.
• Part No. M92669 - 25 m heavy replacement cable.
The maximum inter-unit cable length is limited by the minimum supply
voltage, the scanner type (18” or 24 “radome), and the cable type (2 or 4
power cores).
For boats with 12 V DC power systems details of recommended cable(s) for
different run lengths can be found in Extending the power cable on
page -11.
Boats with 24 V DC power systems can use any combination of inter-unit
cables.
To display or extension
(power supplied via display unit)
To Radome Scanner
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