4-6
Airnet® II 4-Channel Particle Sensors Operations Manual
Chapter 4
: 4-20 mA Signal Configuration / Operation
Connecting 4-20 mA Outputs to a SCADA Data Collection
System
Connecting 4-20 mA Outputs to a SCADA Data Collection
System
To connect to a SCADA data collection system, build a cable that will allow connection
of the Airnet II 4-Channel particle sensor to the SCADA system’s 4-20 mA input. The
cable must be compatible with the 12-pin Molex Micro Fit 3.0 connector plug located
on the rear of the sensor. The following pins are used on the connector.
Table 4-6
Airnet II 4-Channel particle sensor 4-20 mA connector pins
1.
After completing the cabling for the 12-pin Molex Micro Fit connector, install the
ferrite as close as practical to the connector (that will still allow you to insert
and/or remove the connector in the future).
2.
Connect the cable from the Airnet II 4-Channel particle sensor’s 4-20 mA output
to the data collection system’s input.
3.
Set up the data collection system to correctly interpret the sensor’s 4-20 mA
output.
Pin
Function
Instrument connector view
6
24 VDC
5
Current output for Status
4
Current output for Channel 4
3
Current output for Channel 3
2
Current output for Channel 2
1
Current output for Channel 1
12
Ground (24 VDC return)
11
Ground (status return)
10
Ground (Channel 4 return)
9
Ground (Channel 3 return)
8
Ground (Channel 2 return)
7
Ground (Channel 1 return)
