Nexus 21 Work Light CS4500-610 Benutzerhandbuch

6

BRN

WHT

GRN

BLK

RED

RED

GRN

B

ARE

WHT

BRN

RED

BLK

BATTERY

INSTRUMENT

SENSOR

1. From outside the junction box, carefully pull each of the cables 

in turn until only 13mm (1/2") of the cable jacket remains inside 
the box (see Figure 9).

2. Starting with the battery cable, wire each cable in turn to the 

corresponding terminal block. Follow the color code on the PC 
board. Insert the stripped end of a wire in the hole in the 
corresponding terminal. Simultaneously depress the adjacent 
button using a small blade screwdriver. Release the button to 
lock the wire in place. Be sure the stripped end of the wire is 
inserted up to the insulation only. Do not include any insulation 
inside the terminal. Gently tug on the wire to ensure it is locked 
in place. Repeat this process until all wires are connected.

3. Hand-tighten the nut on each compression bushing to make a 

waterproof seal.

4. Arrange the wires neatly inside the junction box being sure that 

no bare wires are touching.

5. Attach the junction box cover with the screws provided for a 

waterproof seal.

6. Using the screws provided, attach the junction box to the 

selected mounting surface at the holes previously drilled.

To connect the instrument cable to the display, follow the 
instructions in your instrument owner’s manual for connecting a 
speed sensor. See the color code below.

Red

B+ (5 to 15V)

Green (GRN)

signal

Bare

ground

White (WHT)

temperature

Brown (BRN)

temperature

Wiring the Power Panel (Battery)

Cut off the bare wire flush with the cable jacket. To connect the 
power cable to the power panel, see the color code below.

Red

+

10 to 15 VDC

Black (BLK)

–

 VDC

• Is the ultrasonic insert installed in the housing and connected to 

the junction box?

• Is the ultrasonic insert oriented with the arrow on the top 

pointing forward toward the bow? If the insert cannot be seated 
in the housing with the arrow pointing forward, check that the 
arrow on the lip of the housing is pointing forward toward the 
bow. If this is not the case, the housing needs to be reinstalled 
with the proper orientation.

• Is power being supplied to the junction box? The power must be

10-15VDC. At lower voltages performance is degraded and the 
unit will shut down. If there is no voltage, check the wiring.

• Are the wire connections at the terminals in the junction box 

tight and properly stripped of insulation?

• Does the color of each wire match the color label on the PC 

board?

• If the ultrasonic speed sensor is “on” when the boat is 

stationary, you may see a speed readout of a fraction of a knot 
because of water movement under the hull.

• If the speed reading is consistently the same percentage higher 

or lower than the true speed, the speed function within the 
instrument needs to be recalibrated. Follow the instructions in 
your instrument owner’s manual.

• If speed readings are inaccurate above about 10knots:

- The sensor is installed in turbulent water. The cause may be 

water intake or discharge openings, strakes, fittings, hull 
irregularities upstream of the sensor, or the shape of the hull 
in that area. The sensor must be re-installed in another 
location.

- The ultrasonic insert is covered with aquatic growth. See 

“Servicing the Ultrasonic Insert” on page 4.

- Aerated water is flowing across the sensor because the boat 

is designed to pull air under the hull. The sensor will not work 
on this type of boat.

If you have purchased a plastic housing and have a wood hull or 
desire greater strength, purchase a bronze housing. Obtain the 
following parts from your marine dealer or instrument manufacturer.

The information needed to order a replacement Airmar sensor is 
printed on the cable tag. Do not remove this tag. When ordering, 
specify the part number and date.

20-600

04-234-1 (plastic)
02-131-01 (bronze)

04-004 (plastic)
02-030 (bronze)

33-340-02 (plastic)
33-340-01 (bronze)

33-450-01

TECHNOLOGY CORPORATION

35 Meadowbrook Drive, Milford, New Hampshire 03055-4613, USA 

 www.airmar.com 

Figure 9. Wiring the Junction Box

button

button

Copyright ©:

Kuskvägen 4, 191 62 Sollentuna, Sweden

Tel: +46 -(0) 8 – 506 939 00. Fax: +46 -(0) 8 -506 939 01

www.nexusmarine.se

Green
Yellow
Bare

Wite
Jumper from Bare