4-2
Airnet® II 4-Channel Particle Sensors Operations Manual
Chapter 4
: 4-20 mA Signal Configuration / Operation
Configuring 4-20 mA Outputs
The signals are output through a 12-pin Mini-Fit
®
connector plug located on the
sensor’s rear panel.
Configuring 4-20 mA Outputs
Configuring the 4-20 mA outputs is the process of setting parameters to define the
collection of the particle data, and to enable the data collection system to correctly
interpret this data.
First, establish communications with the Airnet II 4-Channel particle sensor, and then
use software commands to configure the sensor.
Required Hardware and Software
•
Computer loaded with HyperTerminal, or other terminal emulation software
•
RS-232 configuration cable (provided in your shipment). Wiring for this cable is
as follows:
Table 4-3
4-20 mA factory preset status levels
Current
Flow Status
Laser Status
8 mA
OK
OK
12 mA
OK
Bad
16 mA
Bad
OK
20 mA
Bad
Bad
NOTE:
The following information assumes that the operator has a working
knowledge of terminal emulation software such as HyperTerminal.
Table 4-4
RS-232 pinouts
(RJ-11 Connectors on the Airnet II 4-Channel particle sensor)
Pin 1
DSR
Pin 2
Transmit
Pin 3
Receive
Pin 4
RTS
Pin 5
CTS
Pin 6
GND
NOTE:
Windows includes a terminal emulator called HyperTerminal. Other terminal
emulator programs are widely available. Your IT administrator or
microcomputer support person may be able to provide assistance.
