Blue Sea Systems M2 OLED - Pin-Out Table; Tank Connections

Tank Functions (1839)
Monitor up to four tanks. Provides High/Low level alarms for each channel.
Connections
IMPORTANT! The Sensing Description section of this manual gives important details to the location of sensors in the AC and DC electrical
systems of the boat. Improper location and conguration of sensors can result in erroneous readings and possible damage to components.
Pin-out Table
1839 Connector Pin Assignment Table
8 Pin Connector*
Function
1 Required Connection
2 Required Connection
*The 8 pin low voltage connector supports wire sizes from 16-26 AWG
3
4
5
6
7
8
DC Negative
DC Supply
Relay DC Out to Load
Relay DC +
Tank 1
Tank 2
Tank 3
Tank 4
USB Micro USB Port
4
Meter Power Supply Connections
All meters must have pins 1 (DC Negative) and 2 (DC Supply) connected. These pins are used to provide power to the meter. Connect pin 1 to ground
and pin 2 to a 12V to 48V power source.
Tank Connections
North American Standard Senders
North American Standard senders are resistive type senders that have a resistance between 240 and 33 ohms. (With 240 ohms indicating empty).
European Standard Senders
European Standard senders are resistive type senders that have a resistance between 10 and 180 ohms. (With 10 ohms indicating empty).
Blue Sea System Ultrasonic Senders
Blue Sea Systems Ultrasonic sender use sound waves to measure the distance from the sender to the top of the liquid in the tank. Blue Sea Systems
has two different senders, one for gasoline (1800) and one for diesel, water, and waste (1810).