INTRODUCTION
I-6
■
ENVIRONMENT
Frame Ground Connection
IMPORTANT
Grounding the Central Control Unit (CCU) is very important not only as a countermeas-
ure for lightning protection described in the next item, but also for ensuring correct
operation of the system.
Always make sure that the FG terminal of the CCU is grounded.
(See page I-8 for detailed instructions on installation.)
Lightning
Protect the system from lightning by properly grounding the AC cable as well as installing voltage
surge suppressors and diode clamps on all external cables attached to the system.
WARNING
Do not leave any of the cables or the internal lines outside because lightning may
cause serious damage to the system. But, if you install in any reason, use protectors.
Electrical Noise
Electrical noise might disturb the operation of the system’s digital control circuits.
Place the equipment away from heavy motors, welders or dimmers, and radio receivers and comput-
ers which generate electrical noise.
Conversely, this system may interfere with radio receivers and computers. Place the CCU at least
10 feet (3 meters) away from all other equipment.
Gas and Airborne Particles
To avoid corrosion or oxidation of electrical relay contacts, place the equipment in an area free of
airborne particles and corrosive gas.
Humidity
Excessive humidity may oxidize the metallic parts and cause errors in performance.
Do not install equipment in high-humidity areas.
Humidity: 30% to 90% relative humidity (non-condensing)
Temperature
Integrated circuits (ICs) and large scale integrated circuits (LSICs) require adequate ventilation for
the CCU to allow upward circulation of air through the cabinet grille.
Operating room temperature : 0
;
to 40
;
(32
,
to 104
,
)
Storage temperature
: -10
;
to 50
;
(14
,
to 122
,
)
Vibration
Do not install the system in an area with excessive vibration which can cause disconnection or
loosening of components.
Water
Water is a dangerous hazard to equipment and can damage the system beyond repair.
Do not place the equipment near anything containing water, under overhead plumbing or sprinkler
system valves, or in areas that are susceptible to flooding.
Summary of Contents for VoiceSonic VB-9411AD
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Page 94: ...CONNECTION OF OPTIONAL UNITS I 34 MEMORANDUM ...
