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MPA 401-70V • Mounting
B-2
Mounting
Plenum Placement
The MPA 401-70V amplifier meets UL 2043 requirements for heat and smoke
release. It can be installed in the ceiling, out of sight, with reduced risk of theft.
C
Although the amplifier is plenum rated, the power supply provided with it
is not. The power supply must not be placed in the plenum space. Cables
to and from the amplifier must also be plenum rated.
Tabletop Placement
Attach the four provided rubber feet to the bottom of the unit and place it in any
convenient location.
Rack Mounting
UL guidelines for rack mounting
The following Underwriters Laboratories (UL) guidelines are relevant to the safe
installation of this product in a rack:
1. Elevated operating ambient temperature — If the unit is installed in a closed
or multi-unit rack assembly, the operating ambient temperature of the rack
environment may be greater than room ambient temperature. Therefore, install
the equipment in an environment compatible with the maximum ambient
temperature (TMA: +122 °F, +50 °C) specified by Extron.
2. Reduced air flow — Install the equipment in the rack so that the equipment
gets adequate air flow for safe operation.
3. Mechanical loading — Mount the equipment in the rack so that uneven
mechanical loading does not create a hazardous condition.
4. Circuit overloading — Connect the equipment to the supply circuit and
consider the effect that circuit overloading might have on overcurrent
protection and supply wiring. Appropriate consideration of the equipment
nameplate ratings should be used when addressing this concern.
5. Reliable earthing (grounding) — Maintain reliable grounding of
rack-mounted equipment. Pay particular attention to supply connections other
than direct connections to the branch circuit (such as the use of power strips).