Extron Electronics MPX 423 A - Manual (Page 14)

MPX 423 A • Installation 2-2
Installation
PRELIMINAR
Y
Mounting the Matrix Switcher
MPX 423 A Matrix Switchers are housed in 1U high, 17.4” wide metal enclosures
that are rack- or desk-mountable. A rack/desk mounting kit (#70-077-03) is
supplied with each switcher. A switcher may also be mounted under a table, desk,
or podium, or on a wall, using the optional under-desk mounting kit (#70-222-01).
Tabletop use
Affix a self-adhesive rubber foot to each bottom corner of the switcher.
Rack mounting the switcher
UL requirements for rack mounting
The following Underwriters Laboratories (UL) requirements pertain to the
installation of the MPX 423 A into or onto a rack.
1. Elevated operating ambient — If installed in a closed or multi-unit rack
assembly, the operating ambient temperature of the rack environment may
be greater than room ambient termperature. Therefore, consider installing
the equipment in an environment compatible with the maximum ambient
temperature (Tma) specified by the manufacturer (122˚F, 50˚C for the MPX).
2. Reduced air flow — Installation of the equipment in a rack should be such
that the amount of air flow required for safe operation of the equipment is not
compromised.
3. Mechanical loading — Mounting of the equipment in the rack should be such
that a hazardous condition is not achieved due to uneven mechanical loading.
4. Circuit overloading — Consideration should be given to the connection of the
equipment to the supply circuit and the effect that overloading of the circuits
might have on overcurrent protection and supply wiring. Appropriate
consideration of equipment nameplate ratings should be used when
addressing this concern.
5. Reliable earthing (grounding) — Reliable earthing of rack-mounted
equipment should be maintained. Particular attention should be given to
supply connections other than direct connections to the branch circuit (such as
the use of power strips).