Installation manual

ESI Communications Servers Hardware Installation Manual External connections
I.1
External connections
Grounding instructions
System grounding (supplemental ground) is as follows:
• The conductor wires can be no smaller than the ungrounded branch-circuit supply conductors (usually 16-
gauge or higher).
• Acceptable wire: bare or covered with green (or green-and-yellow-striped) jacket.
• Conductors (and power receptacles) shall connect to earth ground at the service equipment (usually a cold
water pipe or copper ground rod).
• The supplemental ground must: be used regardless of power cord ground, be connected to the ground lug
on the bottom of the cabinet, and retain ground connection when the power supply module is unplugged.
• Connect the grounding lugs of all units to system ground
Note: ESI Communications Server lines are protected against a 10 KV surge only if the earth ground procedures
described above are followed.
Power
Each cabinet requires a 110 VAC outlet (if possible, a dedicated outlet). Use only the Class-2 power supply
module provided. A clean, isolated power source in conjunction with a UPS is STRONGLY recommended.
The following table shows the power consumption of each ESI Communications Server when fully loaded:
System Cabinets (Base and Expansion)
in fully loaded system
Power consumption
(in watts)
ESI-1000 6 1,080
ESI-600 4 720
ESI-200 2 360
ESI-100 3 125
ESI-50 2 72
If AC power is interrupted, the system will drop all connections. When power is restored, the system will resume
normal operation in approximately five minutes, having retained its full programming and clock setting.
UPS
For system protection and to maintain uninterrupted operation, an uninterruptible power supply is
STRONGLY recommended. Here are the recommended UPS ratings for each system:
System Recommended UPS minimum rating
PER INSTALLED CABINET (in VA)
ESI-1000 230
ESI-600 230
ESI-200 230
ESI-100 125
ESI-50 125
Refer to the particular UPS unit’s specifications to determine expected backup duration during a power outage.
Note: The remaining information under “UPS” comes from Technical Update #216.
Most people have heard about UPSs, but seem to think that there is just one kind of device that goes by that
name. In fact, there are several different major designs in use by today’s major UPS manufacturers. These
makers share much of the blame for confusing UPSs’ end users by, far too often, lumping different designs
under the “UPS” name.
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