Wavetronix smartsensor advance User Manual page 29

CHAPTER 2 • CONNECTING POWER AND SURGE PROTECTION
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+24 VDC
-DC
+RS-485
-RS-485
GND
Providing System Surge Protection
The Click 222 system surge protector is designed to prevent electrical surges conducted
along underground cables from damaging the cabinet equipment (see Figure 2.6).
Note
The SmartSensor Advance has built-in surge protection and so there is no need to
use a pole-mount box for surge protection on the sensor side of the cable. However,
it is strongly recommended that the sensor be connected to a surge protection device
in the main traffic cabinet. If you choose not to use surge protection in your main
traffic cabinet, please contact Wavetronix Technical Services for assistance.
When a Click 222 is present, the power and RS-485 serial connections on the T-bus and
faceplate are protected from surges on the incoming SmartSensor 6-conductor cables.
The Click 222 faceplate has four activity indicator LEDs:
˽ PWR – Indicates that the device has power.
Power
( )
red wire
( black wire )
RS-485
Figure 2.5 – T-bus Pinout Diagram
Figure 2.6 – Click 222 Faceplate