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Aeroqual Series 900 User Guide
4-20 mA wiring diagram for Loop with integrated display
Note: The integrated display is a single ended device and therefore always needs to be located
at the end of the loop.
3.4. Operation as a RS485 Transmitter
The Series 930 unit can communicate over a RS485 bus. Each monitor has an ID which can be user
defined via the Configuration PC software. Up to 255 units can be networked together using the
Network PC software.
Note: Both the Configuration and Network PC software can be found on our website
3.4.1. Connecting via RS485
a. Connect a 24vDC power supply to the power input on the PCB screw connector
b. Use a twisted pair cable to connect the RS485 lines on the screw connector to the RS485
hub, bus or converter
c. Power up the monitor and run the communication software on your computer or PLC
3.4.2. Network Settings
If the S930 is to be used as part of a “daisy chained” RS485 network a number of settings need to be
adjusted.
Jumper settings
The termination resistors need to be set correctly to ensure the network
communication is stable. The jumpers JP1, JP2, JP3 are to install
termination resistors on the RS485 communication lines. Remove the
jumpers J1, J2, J3 for all S930 units in a chain except the last S930 unit in
the network chain. If there is only one unit then set the jumpers in place.
To
access these jumpers remove the sensor head and unscrew the S930 base
plate.
- +
- +
GND +
Power Supply
24VDC
4-20mA
+
-
Integrated Display
External Device