4.1 General cabling guidanceCable types and lengthIt is important to use cables of the appropriate typeand length• Unless otherwise stated use only standard cablesof the correct type, supplied by Raymarine.• Ensure that any non-Raymarine cables are of thecorrect quality and gauge. For example, longerpower cable runs may require larger wire gaugesto minimize voltage drop along the run.Routing cablesCables must be routed correctly, to maximizeperformance and prolong cable life.• Do NOT bend cables excessively. Whereverpossible, ensure a minimum bend diameter of 200mm (8 in) / minimum bend radius of 100 mm (4 in).• Protect all cables from physical damage andexposure to heat. Use trunking or conduit wherepossible. Do NOT run cables through bilges ordoorways, or close to moving or hot objects.• Secure cables in place using tie-wraps or lacingtwine. Coil any extra cable and tie it out of the way.• Where a cable passes through an exposedbulkhead or deckhead, use a suitable watertightfeed-through.• Do NOT run cables near to engines or fluorescentlights.Always route data cables as far away as possiblefrom:• other equipment and cables,• high current carrying AC and DC power lines,• antennae.Strain reliefEnsure adequate strain relief is provided. Protectconnectors from strain and ensure they will not pullout under extreme sea conditions.Cable shieldingEnsure that all data cables are properly shieldedthat the cable shielding is intact (e.g. hasn’t beenscraped off by being squeezed through a tight area).4.2 EV connectionsConnections overview — EV-1 andEV-21. SeaTalkng®2. DeviceNetImportant:The DeviceNet port is for use with the EV-2 only.Do NOT connect this port on the EV-1 unit.Connecting SeaTalkng® cables1. Rotate the locking collar on the unit to theunlocked position.2. Ensure the cable’s connector is correctly oriented.3. Fully insert the cable connector.4. Rotate locking collar clockwise (2 clicks) until it isin the locked position.26