
4.3
Wiring
If the power ground terminal and the negative 4-20mA terminal in the controller are internally connected
(non-isolated 4-20mA input), it is unnecessary to connect the 4-20mA negative wire (green) to the 4-20mA
negative terminal in the controller. If a separate DC power supply other than that from the controller is
used, make sure that the output from the power supply is rated for 22-26 VDC @ 65mA.
*
NOTE
*
The negative 24V power terminal (power ground) and the negative 4-20mA ter-
minal on the ST-730 series probe are internally connected.
Follow the wiring table below to connect the ST-730 series probe to a controller:
Wire Color
Designation
Red
24V +
Black
24V Power ground
White
4-20mA +
Green
4-20mA -
*
Blue
RS-485 A
Yellow
RS-485 B
Clear
Shield, earth ground
*
Internally connected to the power
ground
4.4
Connecting via Bluetooth
A Bluetooth adapter (P/N: MA-WB) can be used to connect an ST-730 series probe to a smart phone with
the
uPyxis®
Mobile app or a computer with the
uPyxis®
Desktop app.
Figure 5. Bluetooth connection to ST-730 series probe
4.5
Connecting via USB
A USB-RS485 adapter (P/N: MA-485) can be used to connect an ST-730 series probe to a computer with the
uPyxis®
Desktop app.
*
NOTE
*
Using non-Pyxis USB-RS485 adapters may result in permanent damage of the ST-
730 series probe communication hardware.
ST-730 Series User Manual
| +1 (866) 203-8397
6