Blue Sea Systems M2 Instructions Manual page 6

M2 Relay Connections
M2 Meters contains an internal MOSFET relay that can drive external DC loads up to 0.5A. The input is protected with a thermally activated auto-reset-
ting fuse that will protect against shorts. In addition, an inline fuse rated at 5A should be used to protect against shorts. In typical applications, a power
source is connected to the Relay+ pin and a load is connected to the Relay Out to Load connection.
4
Relay Supply
Pin 4 voltage connections are only required if the
relay is used or if the battery monitor function is used.
3
500mA DC Maximum current
External LED
An external LED such 8171 can be connected to the Relay Output terminal. If the system is going to operate at
more than 24V nominal, an additional 4K Ohms of resistance should be placed in-line with the LED.
LED
Supply
8 to 70V
1 2 3 4 5 6 7 8
Red Wire
Yellow Wire
6
Optically isolated relay control
LED,
12V/24V
8033, Amber
8171, Red
8172, Green