Lowrance NEP-1 Operation Instruction

Pub. 988-0170-011

NEP-1

Navico Expansion Port

This document will show you how to install a Navico Expansion Port
(NEP-1). The NEP-1 has five Ethernet ports used to share a variety of
information — including sonar and radar data — with multiple display
units, depending on the capability of the display unit.

The NEP-1 comes packed with a fuse, an inline fuse holder and a 6'
power cable.

Navico Expansion Port (NEP-1).

Tools and Supplies

Required tools include: drill, drill bits, Phillips screwdriver. For thru­hull installations, you also will need a 5/16" (8mm) wrench.

Required supplies differ depending on how you are going to install the
NEP-1 (thru-hull or self-tapping). None of the required supplies are
included with your NEP-1.

Thru-hull installation:

• No. 6 (3.5mm) stainless steel machine screws (4)

• No. 6 (3.5mm) stainless steel screw lock-washer nuts (4)

• 5/32" (4mm) drill bit

Self-tapping installation:

• No. 6 (3.5mm) self-tapping, stainless steel screws (4)

• No. 6 (3.5mm) lock washers (4)

• 7/64" (2.5mm) drill bit

1

)

2.26in (57.5mm

)

7.76in (197.0mm)

8.27in (210.0mm

6.89in
(175.0mm)

7.40in
(188.0mm)

Installation

1. Select a location for NEP-1 installation that will allow desired
display units to connect to the NEP-1 without kinking, stressing or
tangling Ethernet cables.

NOTE:

Install the NEP-1 module and power cable at least 3 feet
away from your VHF radio antenna to prevent interference.

2. Place the NEP-1 against the installation surface. Mark pilot hole
locations through the ears at each corner of the module.

Caution:

You should read the entire installation section before drilling
any holes in your vessel!

3. Remove the NEP-1 from the installation surface. Using the pilot hole
marks as a guide, drill the pilot holes. If you are using a thru-hull
installation, you will need a 5/32" (4mm) drill bit. For self-tapping
installations, use a 7/64" (2.5mm) drill bit.

4. Align the NEP-1 with the pilot holes and install the screws.

If you are using a thru-hull installation, you will need No. 6 stainless
steel machine screws and stainless steel lock-washer nuts. For self­tapping installations, use No. 6 self-tapping, stainless steel screws with
lock-washers.

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Power Connections

Y

The NEP-1 has four wires; red (+), black (–), yellow and blue. The red
wire is positive, the black wire is the ground and the yellow wire
connects to a switch. The blue wire will not be used. Cap the end of the
blue wire with a wire nut or electrical tape.

ellow wire to

switchbox

Blue wire
not used

Black wire (–)
to battery (–)

Red wire (+) to
inline fuse to
battery (+)

1. Insert the supplied fuse into the fuse holder. Attach the red positive
wire (+) to the fuse holder.

2. Connect the wire on the other end of the fuse holder to a wire
connected to the positive battery terminal (+).

Fuse holder Fuse

3. Attach the black ground wire (–) to the negative battery terminal (–).

4. Connect the yellow wire to a switchbox. Refer to your switchbox
instructions for more information.

NOTE:

If you connect the yellow wire directly to the battery (always-on
configuration), you will have to disconnect the NEP-1 from the
battery when your boat is not in use; otherwise it will run down the
battery.

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