Chapter 5: Installation

5-9

 

 

The dc power and NMEA inputs/outputs should be connected to the POWER/NMEA connector at the rear of the RayChart 420. The connector pin functions are detailed in the following table.

Function

Color

 

 

Battery negative

Black

 

 

Battery positive (10.0Vdc to 18.0Vdc)

Red

 

 

NMEA data input (+ve)

White

 

 

NMEA input (-ve) - common

Green

 

 

Not connected

Grey

 

 

NMEA data out

Yellow

 

 

Data output common

Brown

 

 

Not connected

Screen

 

 

Connect the power supply using the standard power cable supplied, as follows:

1. Connect the moulded power plug to the POWER/NMEA connector on the rear of the chartplotter. Run the free end back to the vessel’s distribution

panel or, if insufficient cable length to a junction box.

2.Cut the cable to length and connect the red wire, via a fuse, to the +ve battery terminal and the black wire to 0V (-ve battery terminal). Protect the circuit with a 1A quick blow fuse or circuit breaker.

3.Use a suitable junction box to connect to NMEA equipment if required.

4.Cut any unused cores short or insulate and tape back.

Note: If the power connections are accidentally reversed, the system will not function. Use a volt meter to check that the input power leads are connected with the correct polarity.

5.7 System Check and Initial Switch On

When you have installed your Chartplotter and made all the connections, you need to check your installation before using the system for navigation. If you encounter any problems, refer to Chapter 6, Maintenance and Fault Finding.

EMC Conformance

Always check the installation before going to sea to make sure that it is not affected by radio transmissions, engine starting etc.

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Raymarine 420D manual System Check and Initial Switch On, Function Color