Particle Monitor One Manual page 23

The functions of the pins on the M12 8-pin connector are dependent on your base board, but the
following pinouts are recommended:
Cable length: 60 ±5 mm
Wire gauge: 24 AWG
M12 8-pin connector, A-coded
M12 CONNECTORS
The standard M12 connectors are IP67 waterproof (connected or not), 12 mm in diameter, and have
8 pins or 4 pins. However, M12 connectors are available from 2 pin to 17 pins. The connectors with
smaller numbers of pins often have higher voltage and current ratings.
The panel-mount 8-pin connector on the Monitor One is female, with the following pinout:
Looking at the bulkhead connector from outside the enclosure
The panel mount M12 8-pin connector fits in the following hole in the enclosure:
Conn P1 (M12) Conn P2 (PHR-8) Color
2 1
8 2
6 3
5 4
1 5
7 6
4 7
3 8
Round Rectangular
Enclosure Expansion Card
Function
Red VIN (6-30 VDC)
Black Ground
Pink RS485_P
Gray RS485_N
White CAN_P
Blue CAN_N
Yellow 0-10V input
Green 4-20mA input