Operating Instructions and Installation Instructions

ComNav Navigator G2 Installation & Operation Installation

Document PN 29010081 V1.1 - 23 -

Ship Power Bus Terminal

Ship Power into the Distribution Unit must connect to the Power Bus block. The Distribution

Unit protects the Vector and Display Head power from Ship Power over voltage and reverse

voltage faults. It is important that the Vector and Display Heads receive their power input

from the protected power connections on their connector block.

Ship

Power

and

Polarity

Indicator

Figure 10 - Ship Power Connection

In figure 10, the top tier of terminals, on the Power Bus block, are electrically connected

together on the Distribution Unit and be connected to the positive (B+) Ship Power wire.

The bottom tier of terminals, on the Power Bus block, are electrically connected together on

the Distribution Unit and be connected to the negative (B-) Ship Power wire

The indicator LED will be GREEN if:

• Ship Power is applied, AND

• polarity (B+, B-) are correct.

If an over voltage or reverse voltage condition occurs on the Ship Power terminal, a

thermally-resetting fuse will break. Once the Ship Power fault condition is corrected, it may

take several minutes for the thermal fuse to reset.

Post Check

Before applying ship power, check the following:

• All wires are secure

• No frayed wire strands come out of the terminal blocks

• Cord grips are tight

Power Up Test

To power up the Distribution Unit and verify that it is functioning:

• Turn on Ship Power (B+ and B-).

• Verify GREEN Power