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3 General information
LXNAV SMARTSHUNT is smart battery monitoring unit
compatible with NMEA2000 network standard. It
accurately measures DC voltages of up to three
batteries bounded in series and includes shunt for
current measurements. With additional temperature
sensors for each battery pack, it estimates state of
charge, state of health and remaining time. It supports
multiple types of batteries and can be configured
through any LXNAV Exxx device or via webpage
accessible over internal Wi-Fi hotspot. Parameters set
there are available on NMEA2000 network to any
device such as LXNAV's E350, E500 etc. LXNAV
SMARTSHUNT is available in three versions with 100,
300 and 500 A shunt. All of them are 25 mV. For proper
installation read next chapters carefully.
QR code for WiFi configuration
NTC sensor
inputs
Status LED
Battery LED
Battery connector
and power supply
Configuration Shunt button
Figure 1: SMARTSHUNT - top view
4 Installation
4.1
SMARTSHUNT has flat bottom and should be mounted
with two screws to solid surface next to battery packs
to minimize wire length from battery terminals to
connector on SMARTSHUNT. With this, measurement
error is minimized to minimum.
4.2
Compatibility
Bit rate
Connection
4.3
Power supply & battery inputs B1-B3
LXNAV SMARTSHUNT is powered from 4-pin terminal
N2K connector
connector from which it also measures voltages of up
to three batteries. Maximum allowable voltage on each
+Bx terminal is 65 V. When installing, try to make
sense wires as short as possible and keep them away
from high current sources like cables, electric motors
etc.
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Mounting recommendation
Do not work on the electrical system
while it is energized.
Do not install the SmartSHUNT near
inflammable substances.
Do not place the SmartSHUNT in a wet,
humid
or
compartments.
Unauthorized
modifications
manufacturers' liability for any resulting
damage.
Do not mix batteries of various brands,
voltages or capacities.
NMEA2000 specifications
Parameter
NMEA2000 compatible
250 kbps
A coded M12 connector
Table 1: NMEA2000 specifications
Connectors
Figure 2: Battery terminals
high
temperature
exclude
Description
