Installation manual

IVX 128 Hardware overview/installation
B.13
External connections
Grounding instructions
IVX 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 IVX cabinet, and retain ground connection when IVX power sup-
ply module is unplugged.
• Connect the grounding lugs of all units to system ground
Note:
IVX lines are protected against a 10 KV surge
only
if the earth ground procedures described
above are followed.
Power
Each base cabinet requires a 110 VAC outlet (if possible, a dedicated outlet). Use
only
the Class-2
power supply module provided. Expansion Cabinets, as well as the 64-Key Expansion Console,
require no additional AC power. A clean, isolated power source in conjunction with a UPS is
STRONGLY
recommended. Each base cabinet draws a maximum of 25 watts. A fully loaded system
draws no more than 50 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. A UPS rated for 200 VA will provide approximately two hours of uninter-
rupted service for a fully loaded IVX. Every 50 VA of capacity added to the UPS will yield
approximately one-half hour of additional backup.