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C
4
HAPTER
Table
4.2:Maximum power requirements of the communication server (Continued) (Sheet 2 of 2)
Mitel SMBC
The battery capacity required [Ah] can be calculated using the battery voltage and the maximum bridging
time. It is important to note that the battery must never be allowed to become completely discharged and
that in typical conditions only approx. 60% of the maximum power requirements is needed.
: The uninterrupted operation of the communication server is ensured if the UPS takes over the
NOTE
power supply within 20ms of the mains outage.
See also
For more technical details see
Earthing and protecting the communication server
The protective earth and equipotential bonding are important integral parts of the safety concept: Stan-
dard EN 60950 relevant to safety matters stipulates protective earthing.
: High leakage currents can occur as a result of connecting to the communication network. Estab-
CAUTION
lish an earth connection before connecting to the communications network.Disconnect the communica-
tion server from the communications network before carrying out maintenance work.
: Transient overvoltage can occur on the mains and on the communications network. Protect
CAUTION
each line installation leading from the building by using one surge voltage protector per core at the
isolating point (main) distribution frame or entry point into the building.
Operation on an IT current distribution system:
The communication server can be operated on an IT power distribution system as per EN/IEC 60950 with
voltages of up to 230 VAC.
Connecting the earthing wire
The communication server's earthing connection is located at the front left on the underside and can only
be connected once the housing cover has been removed. The earthing wire is secured by a screw, spring
washer and serrated lock washer, which are included in the screw set of the communication server. The
serrated lock washer must rest against the metal housing of the communication server.
Network
interfaces.
E
ARTHING AND PROTECTING THE COMMUNICATION SERVER
I
NSTALLATION
100
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