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4.4 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 (gray) 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 @ 65 mA.
*
NOTE
*
The negative 24V power terminal (power ground) and the negative 4–20mA ter-
minal on the ST-772/T sensor are internally connected.
Follow the wiring table below to connect the ST-772/T sensor to a controller:
Table 3.
Wire Color Designation
Red 24V +
Brown 24V Power ground
Gray
*
4–20mA -
White 4–20mA +
Pink RS-485 C
Blue RS-485 A
Yellow RS-485 B
Green Earth ground
Black Shield
*
Internally connected to the power
ground
4.5 Connecting via Bluetooth
A Bluetooth adapter (P/N: MA-CR) can be used to connect a ST-772/T sensor to a smart phone with the
uPyxis® Mobile App or a computer with a Bluetooth/USB Adapter (P/N: MA-NEB) and the uPyxis® Desktop
App.
Figure 4. Bluetooth connection to ST-772/T sensor
ST-772/T User Manual service@pyxis-lab.com | +1 (866) 203-8397 8