Providing system surge protection – Wavetronix SmartSensor Matrix (SS-225) - User Guide User Manual

Page 110

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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

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