Lasair II Particle Counter Operations Manual
Page J-1
Appendix J
4-20 mA Input and Output
4-20 mA Input
Up to four optional sensors can be connected to Lasair II particle counter’s 4–20
mA connector (type DB15F) on the rear of the case. Use this appendix to find the
following information:
Cable Pin-outs
Standard PMS Cable
Pin Number
Pin Use
Temperature
1
Analog signal 1 input
2
Analog signal 1 GND
3
12–24 VDC
Relative Humidity
4
Analog signal 2 input
5
Analog signal 2 GND
6
12–24 VDC
Differential Air Pressure
7
Analog signal 3 input
8
Analog signal 3 GND
9
12–24 VDC
Air Velocity
10
Analog signal 4 input
11
Analog signal 4 GND
12
12–24 VDC
13
GND
14
GND
15
GND
