Specifications

Chapter 3: Installation 23

This requirement depends on the total length of the cable run and the total

number of instruments in the system, as follows:

Stand alone instruments

Stand-alone instruments are not connected to SeaTalk and therefore need to be

connected to an alternative 12 V power source. Power cables are available in 2 m

and 9 m lengths.

To fit a power cable:

1. Ensure the intended power source is switched off.

2. Run the power cable from the instrument to a suitable 12 V dc power source.

3. If the cable has not already been trimmed at the power supply end:

i. Cut the cable to length and trim back an appropriate amount of the outer

sheath.

ii. Cut back and insulate the yellow wire.

4. Connect the screen to the power supply 0 V terminal.

5. Connect the red wire, via a 3 A fuse or protective circuit breaker, to the power

supply +12 V terminal.

6. Insert the power cable connector into one of the SeaTalk connectors at the

rear of the instrument.

Cable run No. of instruments Power connections

Up to 10 m 13 maximum

26 maximum

Up to 20 m 7 maximum

13 maximum

Power connections for stand-alone instrument

12 V dc

supply

3 A over-current

circuit breaker

Red

Screen

D4310-6

81266_1.book Page 23 Monday, December 5, 2005 9:28 AM