Blue Sea Systems 1841 Instruction Manual

Connector Pin Assignment System Overview
360 Panel Mounting Kit PN 1525 sold separately
Components Included
bluesea.com/products/1841
Connector Pin Assignment Table
M2 OLED
Digital Monitor
QuickStart Installation Guide
1841 Temperature Monitor
M2 Head Unit Surface Mount Gasket
Mounting Ring
Surface Mount Bezel
and Seal
Mounting Nut
Flat Mount Bezel
Screwdriver
(retail package only)
Connector
Bezel
Mount
Footer
Header
Carrier
Mount
#6-32 x 1/4"
Flat Head
Machine Screws
(4X)
#6-32 x 3/8"
Flat Head
Machine Screws
(4X)
Surface Mount Cover Flat Mount Clamp
2 x 1820
Temperature Sensors
1841 Temperature Monitor Connections
Panel
Frame
Screen Menu Functions
Press any button to bring up the menu.
1. After start-up, press any button to access the menu.
2. Press the UP or DOWN arrow buttons to scroll
through menu windows.
3. To set alarms and for more detailed information, see
the online manual at bluesea.com/products/1841
M2 Meter Navigation
Relay
(7713 12V)
(7717 24V)
Alarm (1070) LED
(8033 Amber)
(8171 Red)
(8172 Green)
OROR
Battery
For the online manual that includes other configurations,
go to bluesea.com/products/1841
Temp 1 Temp 2 Temp 3 Temp 4
Temperature Sensor Connections 1821
1821 Temperature Sensor
Note: The negative feed of all of the temperature sensors
should terminate as close as possible to pin 1. Use Blue Sea
Systems’ PN 2304 Mini Bus with a short 18 AWG guage wire
from pin 1 to the Mini Bus.
Installation Steps
980023490 Rev.002
bluesea.com
Basic Meter Setup
Click here for more information at
bluesea.com/products/1841
8 Pin Connector* Function
1Required Connection
2Required Connection
3
4
5
6
7
8
DC Negative
DC Supply
Relay DC Output
Relay DC Supply
Temperature 1
Temperature 2
Temperature 3
Temperature 4
USB Micro USB Port
*The 8 pin low voltage connector supports wire sizes from 16-26 AWG
12345678
12345678
5A Fuse
2 x 1821
Temperature Sensors
1. Choose meter mounting style and location.
2. Prepare mounting hole using cutout templates
3. Using wiring diagram and pinout chart make all
connections to the meter Connector. Do not put
fuses into fuse holders at this time.
4. Plug wired terminal block into the meter.
5. Insert 5A fuse into DC Supply wire to power meter.
1. No setup is required for basic operation.
2. For information regarding advanced setup
options, see the full instructions on our website.
bluesea.com/products/1841
980023490-002-1841QS-1-072722.pdf 1 7/27/22 10:00 AM

Mounting
Substrate
Mounting
Substrate
Clamp
Flat
Mount
Bezel
M2
Head
Unit
M2
Head
Unit
Surface
Mount
Bezel
and Seal
Mounting
Ring and Nut
Surface
Mount
Gasket
Mounting
Ring and Nut
Surface
Mount
Cover
NOTE: During
installation use
cover to align the
bezel and gasket
Flat Mount
Surface Mount
Mounting TemplatesMounting Options
If you are not knowledgeable about electrical
systems, have an electrical professional install this
unit. The diagrams in these instructions pertain to
the installation of the unit and not to the overall
wiring of the vessel.
Verify that no other DC or AC sources are connected
to the vessel’s wiring before installing the unit.
WARNING
The back of the unit is not waterproof. Do not
install where the back of the monitor is exposed
to water.
CAUTION
WARNING
The WARNING symbol refers to possible injury to
the user or significant damage to the monitor if
the user does not follow the procedures.
CAUTION
The CAUTION symbol refers to restrictions and
rules with regard to preventing damage.
The M2 OLED Digital Meters come with a 5 year
manufacturer’s warranty. This means the meter is
warranted to be free from defects in materials or
workmanship for 5 years from the date of first
purchase. The warranty is limited solely to the cost
of repair or replacement of the M2 Meter product.
Costs associated with labor or shipping of the
defective parts are not covered.
Blue Sea Systems cannot accept liability for damage
due to the misuse of the M2 Meter.
Warranty
3.40" (86.5mm)
3.46" (87.9mm)
Ø2.125"
(54mm)
Cut Line
Cut Line
3.34" (84.8mm)
3.03" (77mm)
3.03" (77mm)
3.34" (84.8mm)
Flat mount bezel edge
Flat Mount
Surface Mount
980023490-002-1841QS-1-072722.pdf 2 7/27/22 10:00 AM