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106 APPENDIX

Note

This appendix covers the basics of the Click 221. For a full explanation of how to use

the Click 221, see the Click Series User Guide.

Outgoing DC- voltage onto the T-bus is protected from electrical surges incoming from

the DC+ and DC- screw terminals. ese terminals do not have reverse-polarity protec-

tion, but assumes that all downstream devices will have proper polarity protection. e

surge protection meets the IEC 61000-4-S 4KV (Class 4) specication.

Figure C.1 – The Click 221

e LED on the faceplate will be on if the device is properly powered and the surge pro-

tection is operational (see Figure C.1). e LED will be o if the DC wires are wired

backwards (reverse polarity), the device is not powered or the surge protection circuitry is

no longer operational. If the LED ickers on an then o when power is applied, this means

that the device is conducting power, but the surge is no longer fully functional. When the

surge is no longer fully functional, please contact Wavetronix Technical Services for as-

sistance.

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Wavetronix SMARTSENSOR 105 Guida Utente Pagina 107