Lowrance electronic EP-90R User Manual
Pub. 988-0154-641
EP-90R Pressure
Electronic Sensor
Installation and Configuration Instructions
This document shows how to install an EP-90R Pressure sensor and
how to connect it to a NMEA 2000
instructions on how to configure your pressure sensor with Lowrance
digital gauges (LMF-200 & LMF-400) and display units.
NMEA 2000 is the communication bus standard developed by the
National Marine Electronics Association (NMEA) for use in boats.
Lowrance has introduced a line of products that can communicate over
a NMEA 2000 network (LowranceNet).
All Lowrance NMEA 2000 capable devices are either NMEA 2000
certified or certification is pending.
CAUTION:
Installing LowranceNET NMEA 2000 devices is significantly
different from installing earlier Lowrance components without
NMEA 2000 features. You should read all of the installation
instructions before proceeding. Decide where you want to install
all components before drilling any holes in your vessel.
Some sonar or GPS display units may require a software upgrade to
display NMEA 2000 data correctly. For free software upgrades or
additional information on the LowranceNet NMEA 2000
system, visit our web site, www.lowrance.com.
®
network. It also provides
®
network
Red NMEA 2000
connector
Hose barb
attachment
EP-90R Pressure Sensor.
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The EP-90R consists of a red cable connector and the EP-90R housing
with standard size hose barb attachment.
The EP-90R Water Pressure sensor, like the other LowranceNet
Electronic Probe (EP) sensors, is designed for use with a NMEA 2000
DeviceNet Network. Your sensor, however, is also compatible with
LowranceNet blue connector networks. It can be added to a blue
connector network by using a red female to blue female adapter cable.
Your sensor MUST be connected to a NMEA 2000 network or it WILL
NOT function.
The NMEA 2000 red female to blue female adapter cable allows users
to add red connector devices to a blue connector network.
Tools and Supplies
Your EP sensor packs with a T connector needed to attach it to a
LowranceNET NMEA 2000 network. If this is the first sensor you are
connecting, you may also need a one-time purchase of a LowranceNET
Node Kit.
The following tools and supplies are NOT included. Required tools
include: a utility knife. For some installations, a Phillips screwdriver
will be needed. Supplies include: zip/cable tie.
LowranceNET Node Kit for a NMEA 2000 network. Includes a 2-foot
extension cable, T connector and two 120-ohm terminators.
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For complete instructions on setting up a new NMEA 2000 network or
expanding an existing one, see the other document packed with your
EP-90R, "Setup and Installation of NMEA 2000 Networks, General
Information" part number 988-0154-173. If that document is not
available, it can be downloaded free from the Lowrance web site.
Installation
The EP-90R Pressure sensor can provide pressure data for the
following categories: Atmospheric Pressure, Engine Boost Pressure,
Engine Oil Pressure, Engine Water Pressure, Fuel Pressure,
Transmission Oil Pressure and Pitot Speed.
WARNING:
The maximum pressure for an EP-90R Pressure sensor is
100 PSI (689 kPa). If that pressure level is exceeded you
not only risk damaging the EP-90R, but could also suffer
bodily injury.
Pitot Tube (Water Speed)
We recommend installing the EP-90R near the boat’s original
speedometer.
NOTE:
If your engine does not have a speedometer hose, you will have to
purchase a pitot tube kit to use the EP-90R Pressure sensor. For
pitot tube installation instructions, refer to your pitot tube
installation manual.
The following steps cover the recommended installation of the EP-90R.
You will attach the EP-90R to a pitot tube hose in the same manner.
1. Remove the pressure hose from the boat’s speedometer.
2. Clip off the end of the pressure hose that was connected to the
speedometer. This will help ensure the pressure hose will fit snugly on
the EP-90R hose barb attachment. The hose-barb attachment
requires a 1.4" (6.35 mm) hose.
1/4 " hose barb attachment
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3. Slide the pressure hose onto the EP-90R hose barb attachment. If it
does not fit snugly, secure it with a zip tie at the base of the hose barb
attachment.
4. Now you are ready to remove the speedometer. Refer to the
speedometer’s installation manual for removal instructions.
5. The EP-90R is ready to be connected to NMEA 2000 network. If the
NMEA 2000 network backbone is in another part of the boat, the EP90R can be linked to the display unit at the console — if one is present
— or either of the LMF digital gauges by using the T connector that
was included in the packaging. If the network backbone is near the
console, connect the EP-90R red male connector to a T connector in the
desired location on the network backbone. The EP-90R is ready for use.
The rest of this document contains detailed information on connecting
to a NMEA 2000 network.
Installing the EP-90R to measure other data:
Follow this installation to monitor the following data: Atmospheric
Pressure, Engine Boost Pressure, Engine Oil Pressure, Engine Water
Pressure, Fuel Pressure and Transmission Oil Pressure.
NOTE:
Make sure the pressure hose has enough slack to be attached to the
pressure sensor when the EP-90R is connected to the NMEA 2000
backbone.
1. Slide the (Atmospheric, Engine Boost, Engine Oil, Engine Water,
Fuel or Transmission Oil) pressure hose onto the EP-90R hose barb
attachment. Attach a zip tie or hose clamp at the base of the hose barb
attachment.
2. The EP-90R is ready to be connected to NMEA 2000 network. If the
NMEA 2000 network backbone is in another part of the boat, the EP90R can be linked to the display unit at the console — if one is present
— or either of the LMF digital gauges by using the T connector that
was included in the packaging. If the network backbone is near the
console, connect the EP-90R red female connector to a T connector in
the desired location on the network backbone.
Connecting to a NMEA 2000 Network
A NMEA 2000 network is a communications link between two or more
devices that transfer NMEA 2000 information. A NMEA 2000 network
functions like the phone wiring in a house. If, for example, you pick up
a phone in the living room you will be able to hear the conversation
someone is having on a phone in the bedroom.
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In similar fashion, a NMEA 2000 network allows multiple display units
to receive data from a GPS antenna or multiple sonar units to receive
messages sent from a temperature sensor. A NMEA 2000 network
gives you the flexibility to view information like, engine diagnostics
and fuel level data on digital gauges or display units located anywhere
on your boat.
There are two types of LowranceNet red connectors: the single T
connector (left) and the double T connector (right).
Network Backbone and Network Nodes
A network bus backbone consists of network cabling, terminators and T
connectors. Network nodes are made by fitting T-shaped connectors into
the backbone (using the sockets on the sides) and attaching any network
device to the bottom of the T.
Staying with the previous phone wiring example, T connectors on the
backbone are the equivalent of phone jacks spread throughout a house.
To pick up a phone and be able to hear a conversation from another
phone in the house, both phones have to be connected to the main phone
line. In similar fashion, only sensors and display units plugged into the
NMEA network can share information.
The network backbone is like the phone wiring that runs throughout a
home. It connects the network nodes, allowing them to communicate
across the network. Connections found in the middle of the bus could have
T connectors or backbone network cable plugged into one or both sides.
Connections at the end of a network will have the backbone cable plugged
into one side and a terminator plugged into the other.
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Terminator at
the end of the
backbone (bus)
Cap for unused
connector
Double T
connector
Backbone cable
(to rest of bus)
Cable from
sensor or
display unit
NMEA 2000 network node located at the end of a NMEA 2000 backbone.
NOTE:
If you have a double T Connector on your network that is not
attached to a device, you must cap the unused connector with a
NMEA 2000 cap. This will protect the pin connectors from
corrosion. The NMEA 2000 cap looks like a terminator, but has
"Cap" stamped into the connector housing.
If you want to add another node to a working network, add another T
connector. T connectors may be purchased from LEI. If you are adding a
Lowrance or LEI NMEA 2000 sensor, it will come with its own T
connector.
Adding a Network Node
You can add a node to any existing connection, anywhere along the
network backbone. This connection could be between a T connector and a
terminator, between two T connectors, between a T connector and a
backbone extension cable or between two extension cables. Wherever you
want to add the new node, separate the sockets of the existing connection
and install the T connector between them.
If you want to add a node at the end of the backbone (network bus)
remove the terminator from the last connector. Install the new T
connector and attach the terminator to the side of the connector.
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Use T-connector or double T connector to add
device to bus (maintaining linear architecture)
Attach
terminator at
end of bus
In this example, a new device is added to the NMEA 2000 bus by
installing a T connector between a T connector and a terminator at the
end of the backbone (network bus).
Backbone cable
to rest of bus
Existing network
node
Devices connect to
double T connector
Additional Network Information
For more information on creating or expanding a network refer to the
NMEA 2000 network setup booklet, part number 988-0154-173, which
came packed with this document.
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Notes
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LMF-200: EP-90R
Pressure Configuration
This section covers how to use EP-90R Pressure Sensor with the LMF200 Multi-function gauge.
NOTE:
You will notice the LMF-200 does not have an Exit key. Menus will
time out after a preset amount of time (3, 5, 10 or 15 seconds). The
default setting is 5 seconds. Refer to your LMF-200 instruction
manual for more information on the Timeout feature.
LMF-200 Multi-function Digital Gauge.
Boat Setup
If this is the first time you have turned on your LMF-200, you will have
to complete Boat Setup before you will be able to configure your
pressure sensor.
To execute Boat Setup:
1. With Boat Setup highlighted on the screen, press MENU. The Boat
Setup menu will appear, allowing you to select an engine-tank
configuration that matches the number of engines and fuel tanks on
your vessel. Boat Setup options include: 1 En/1 Tk, 1 En/2 Tk, 2 En/1
Tk, 2 En/2 Tk, 3 En/1 Tk and 3 En/3 Tk.
2. Select the configuration option that matches number of engines and
tanks on your vessel and press
3. Select the tank you want to set up and press
the Tank Size window.
MENU.
MENU, which will open
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4. Use the
will hold and press
UP and DOWN keys to input the number of gallons the tank
MENU. Repeat steps 3 and 4 for each additional
tank. After all tanks have been set up, you will be directed to the main
display.
Boat Setup Reset
If you want to access the Setup screen (Boat Setup) after an enginetank configuration has been chosen you will have to reset the
configuration to default settings.
To reset engine tank configuration:
1. Press MENU, highlight SYSTEM SETUP and press MENU.
2. Choose
ENG/TANK and press MENU twice. The following message will
appear: Hit menu to reset Eng/Tnk.
3. Press
MENU. The Setup screen will appear with Boat Setup
highlighted.
EP-90R Pressure Configuration
Your EP-90R Pressure Sensor can be configured to measure the
following data types: Pitot Speed (PTT:S), Water Pressure (WTR:P),
Engine Oil Pressure (Eng:O:P), Fuel Pressure (FUL:P), Boost Pressure
(BST:P), Transmission Oil Pressure (Trn:O:P) and Atmospheric
Pressure (ATM:P).
To configure the EP-90R:
1. Press MENU, select SYSTEM SETUP and press MENU.
2. Highlight
pressure sensor (
will appear: Hit Menu to Cfg Pres Snsr.
3. Press
Pressure),
(Boost Pressure), TRN:O:P (Transmission Oil Pressure) or ATM:P
(Atmospheric Pressure) and press MENU. The Select Engine menu will
appear with up to three options. (If your unit is set to a single-tank
configuration, or if you chose Pitot Speed or Atmospheric Pressure, you
will be directed to the Bus Devices list.)
BUS DEVICES and press MENU. Select an unconfigured
UNCFG PRES) and press MENU. The following message
MENU, then select PTT:S (Pitot Speed), WTR:P (Engine Water
ENG:O:P (Engine Oil Pressure), FUL:P (Fuel Pressure), BST:P
4. Select the desired tank and press
the Bus Devices list.
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MENU. You will be taken back to
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