2n Door intercom 2N Helios - Manual, 1322 v3.0 Manual de usuario descargar pdf (Pagina 31)

Grounding Terminal Connection - Mandatory

Any person that gets in contact with 2N® Helios may carry an electrostatic charge of

2N® Helios metal panel

may result in spark discharge. The purpose of the grounding terminal is to protect the

product against this discharge. The terminal carries the charge from the panel to the

ground directly, not through the 2N® Helios circuits.

Where no grounding cable is available, it is possible to connect the grounding terminal

with any of the telephone line terminals*). In some telephone systems one line

terminal is directly connected with the ground, the others carry current to the ground

through overvoltage protection.

Note

 This connection eliminates direct connection of the line conductor onto the

panel because there is a protective element between the panel and the

grounding terminal.

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2n Door intercom 2N Helios - Manual, 1322 v3.0 Manual de usuario Pagina 31