ESI C-Plus Installation Manual download pdf (Page 16)

ESI-50L Hardware Installation Manual External connections

G.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.

A fully loaded ESI-50L system (one Base Cabinet, one Expansion Cabinet) consumes 72 watts.

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.

For the ESI-50L, the recommended UPS minimum rating per installed cabinet is 125 VA.

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.

(Continued)

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 26 27

No comments

ESI C-Plus Installation Manual Page 16