Installation Procedure; Grounding - Samsung DCS-408 Installation Manual

Samsung
DCS-408 & 408i Keyphone System

Installation Procedure

Grounding

!
Grounding is essential to protect users and the keyphone system from lightning strikes, static
electricity and other sources of instant high voltage.
!
The AC power supply normally includes a ground connection. If for any reason it does not, sepa-
rate external grounding should be done (as described here). Separate grounding should also be
done if the AC power supply does include grounding but there is a problem.
!
Incorrect grounding may cause a malfunction in the system.
WARNING
Remove the AC power cable before installing the grounding
connection. If you attempt to connect a ground with the AC power
cord plugged in, you are at serious risk of death or injury.
NOTE: The system illustrated in this section is the DCS-408. However, this grounding procedure
also applies to the DCS-408i system
Connecting an External Ground (Optional)
To connect an external ground, if required, follow these steps.
1. Remove the covers of the system unit as described earlier.
A green cable with a yellow stripe is soldered to the grounding end of the AC power cable
connection (labelled AC INPUT) inside the system unit. The other end of the green cable
is attached to the FRG lug on the power board. (Fig 1.)
Cable connected to AC Input
.
Figure 1
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Installation Manual