Specifications

4.1 General cabling guidance
Cable types and length
It is important to use cables of the appropriate type and
length.
• Unless otherwise stated only use cables supplied by
Raymarine.
• Where it is necessary to use non-Raymarine cables,
ensure that they are of correct quality and gauge for
their intended purpose. (e.g.: longer power cable runs
may require larger wire gauges to minimize voltage
drop along the run).
Cable routing
Cables must be routed correctly, to maximize
performance and prolong cable life.
• Do NOT bend cables excessively. Wherever possible,
ensure a minimum bend diameter (Ø) of 200 mm (7.87
in) / minimum bend radius (R) of 100 mm (3.94 in).
• Protect all cables from physical damage and exposure
to heat. Use trunking or conduit where possible. Do
NOT run cables through bilges or doorways, or close
to moving or hot objects.
• Secure cables in place using cable clips or cable ties.
Coil any excess cable and tie it out of the way.
• Where a cable passes through an exposed bulkhead
or deckhead, use a suitable watertight feed-through.
• Do NOT run cables near to engines or fluorescent
lights.
• Always route data cables as far away as possible from:
– other equipment and cables,
– high current carrying AC and DC power lines,
– antennas.
Strain relief
Use adequate strain relief for cabling to ensure that
connectors are protected from strain and will not pull out
under extreme sea conditions.
Circuit isolation
Appropriate circuit isolation is required for installations
using both AC and DC current:
• Always use isolating transformers or a separate
power-inverter to run PC’s, processors, displays and
other sensitive electronic instruments or devices.
• Always use an isolating transformer with Weather FAX
audio cables.
• Always use an isolated power supply when using a
3rd party audio amplifier.
• Always use an RS232/NMEA converter with optical
isolation on the signal lines.
• Always make sure that PC’s or other sensitive
electronic devices have a dedicated power circuit.
Cable shielding
Ensure that cable shielding is not damaged during
installation and that all cables are properly shielded.
Connections to other equipment
Requirement for ferrites on non-Raymarine cables
If your Raymarine equipment is to be connected to other
equipment using a cable not supplied by Raymarine,
a suppression ferrite MUST always be attached to the
cable near the Raymarine unit.
Dust caps
To prevent potential water ingress, connectors not in
use should be protected using the supplied dust caps.
Bare end wire connections
Your product is supplied with bare end wire connections.
You must ensure that ALL bare end wires are adequately
protected from short circuit and water ingress.
Bare ended wire connections
It is recommended that bare ended wire connections are
made by soldering or using crimp connectors and then
protected by wrapping the connection in insulation tape.
Unused bare ended wires
Any unused bare ended wires should be folded back
and wrapped in insulation tape.
4.2 Connections overview —
Ray53
The following connections are available on the Ray53.
1. Grounding point — DO NOT USE!
2. SeaTalkng ® connection.
3. SO239 VHF antenna connection.
4. TNC external GNSS (GPS) antenna connection.
5. RCA Audio connection.
6. NMEA 0183 connection.
7. Power supply connection.
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