5. Power and Start up
5.3. Grounding
40 SmartLine Wireless Temperature and Universal I/O User's Manual Revision 1
5.3 Grounding
If the transmitter is not grounded solidly through the meterbody mounting, ground the transmitter
by connecting a wire from the Earth Ground Clamp on the side of the transmitter to Earth
Ground as short as possible. Use a size 8AWG or (8.37 mm
2
) bare or green covered wire for this
connection. The tightening torque for the grounding screw (shown in Figure 5-3 is 0.8 Nm to 1.0
Nm (7.1 to 8.9 lb-in).
24V dc Power Supply Option (DC) System Diagram
(Ordinary Non-Hazardous Locations)
+
-
STW TRANSMITTER WITH 24VDC POWER SUPPLY OPTION
(Antenna and Meterbody Omitted for Clarity)
GROUND SHIELD AT THIS END ONLY
+
-
THE POWER SUPPLY OUTPUT SHALL
ONLY BE CONNECTED TO THE
INTERNAL TRANSMITTER CABLE
24Vdc Supply
16.0 Vmin
28.0 Vmax
100 mA max
Figure 5-5: Power Supply 24V dc Option (DC) System Diagram
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