Wavetronix SmartSensor Matrix (SS-225) - User Guide - Manual (Page 110)

APPENDIX 109
( )
( )
+24V DC
-DC
+RS-485
-RS-485
GND
red wire
black wire
Power
RS-485
Green Green Gray
Figure D.5 – T-bus Pinout Diagram
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 D.6).
Figure D.6 – Click 222 Faceplate
Note
The SmartSensor Matrix 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.
˽ DC Surge OK – Indicates that DC surge protection is operational.
˽ TD – Indicates when data is transmitted over the T-bus or over the control bridge. This