User's Manual

1-2 Pre-Installation Considerations Equipment Ventilation
1.2.2 Humidity
Humidity conditions should not exceed 95% relative humidity at 50 °C (122 °F).
1.2.3 Air Quality
For equipment operating in an area which is environmentally controlled and with the repeater(s) rack
mounted, the airborne particle level must not exceed 25 µg/m³.
For equipment operating in an area which is not environmentally controlled and with the repeater(s)
cabinet mounted, airborne particle level must not exceed 90 µg/m³.
1.3 Equipment Ventilation
The repeater is equipped with a cooling fan that is used to provide forced convection cooling. When
planning the installation, observe the following ventilation guidelines:
• Customer-supplied cabinets must be equipped with ventilation slots or openings in the front (for
air entry) and back or side panels (for air to exit). If several repeaters are installed in a single
cabinet, ensure ventilation openings surrounding each repeater allow for adequate cooling.
• All cabinets must have a least 15 cm (6 inches) of open space between the air vents and any
wall or other objects.
• When multiple cabinets (each equipped with several repeaters) are installed in an enclosed
area, ensure appropriate ventilation and consider air conditioning or other climate control
equipment to satisfy the temperature requirements stated under Section on page 1-1.
1.4 AC Input Power Requirements
The repeater is equipped with a switching power supply, and this assembly operates from 100 –
240 V
AC
at 47 – 63 Hz AC input power. A standard 3-prong line cord is supplied to connect the power
supply to the AC source.
It is recommended that a standard 3-wire grounded electrical outlet be used as the AC source.
The outlet must be connected to an AC source capable of supplying a maximum of 280 W. For a
nominal 110/120 V
AC
input, the AC source must supply 5 A and should be protected by circuit
breaker rated at 15 A. For a nominal 220/240 V
AC
input, the AC source must supply 3 A and should
be protected by a circuit breaker rated at 10 A.
1.4.1 Circuit Overloading
Consideration should be given to the effects of overloading on overcurrent protection devices and
supply wiring. Appropriate consideration of equipment ratings should be used when addressing this
concern.
If the repeater is to be installed in an environment which is usually dusty, dirty,
or does not meet the air quality requirements, then the air used to cool the
repeater modules must be treated using appropriate filtering devices. Dust or
dirt accumulating on the internal circuit boards and modules is not easily
removed, and can cause such malfunctions as overheating and intermittent
electrical connections.
The equipment must be installed near an easily-accessible AC source.
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