AC Functions (1836, 1837, 1838)
1836 AC Ammeter measures the current draw of up to two sources or legs.
1837 AC Voltmeter measures the voltages of up to two sources or legs.
1838 AC Multimeter measures the voltages and current draws of up to two sources or legs.
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 configuration of sensors can result in erroneous readings and possible damage to
components.
Pinout Tables
Meter Power Supply Connections
All meters must have pins 1 (DC Neg.) and 2 (DC Pos.) 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. Note on some DC meters pin 2 is also used to monitor additional voltages.
AC Connections (1836, 1837, 1838)
AC Current
In most cases, the AC Current Transformer should be located on the main AC line wire before any other devices.
The Current Transformer does not indicate polarity. The leads should be twisted to reduce the effects of interference from other electrical circuits.
AC Voltage
The AC supply HOT ( Line, or “Ungrounded Conductor”) connection should be protected with a fast acting fuse of 0.25A to 0.5A to protect against shorts.
1836 Connector Pin Assignment Table
8 Pin Connector* Function
1 Required Connection
2 Required Connection
3
4
5
6
7
8
USB
DC Negative
DC Positive
Relay DC Out to Load
Relay DC +
AC 1 Current Transformer –
AC 1 Current Transformer +
AC 2 Current Transformer –
AC 2 Current Transformer +
Micro USB Port
*The 8 pin low voltage connector supports wire sizes from 16-26 AWG
1837 Connector Pin Assignment Table
4 Pin Connector* Function
1 AC Voltage 1 - HOT
2
3
4
1 Required Connection
2 Required Connection
3
4
5
6
7
8
AC Voltage 1 - NEUTRAL
AC Voltage 2 - NEUTRAL
AC Voltage 2 - HOT
No Connection
No Connection
No Connection
No Connection
USB Micro USB Port
DC Negative
DC Positive
Relay DC Out to Load
Relay DC +
8 Pin Connector** Function
*The 4 pin high voltage connector supports wire sizes from 12-24 AWG
**The 8 pin low voltage connector supports wire sizes from 16-26 AWG
1838 Connector Pin Assignment Table
4 Pin Connector* Function
8 Pin Connector** Function
1 AC Voltage 1 - HOT
2
3
4
1 Required Connection
2 Required Connection
3
4
5
6
7
8
USB
AC Voltage 1 - NEUTRAL
AC Voltage 2 - NEUTRAL
AC Voltage 2 - HOT
DC Negative
DC Positive
Relay DC Out to Load
Relay DC +
AC 1 Current Transformer –
AC 1 Current Transformer +
AC 2 Current Transformer –
AC 2 Current Transformer +
Micro USB Port
*The 4 pin high voltage connector supports wire sizes from 12-24 AWG
**The 8 pin low voltage connector supports wire sizes from 16-26 AWG
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