Extron Electronics MVC 121 Plus User Guide - Manual (Page 58)

Mounting
The 1U high, quarter rack width, 3-inch deep MVC 121 Plus stereo mixer can be:
• Set on a table,
• Mounted on a rack shelf,
• Mounted under a desk or tabletop, or
• Mounted on a projector bracket.
Tabletop Use
Each MVC 121 Plus comes with rubber feet (not installed). For tabletop use, attach a
self-adhesive rubber foot to each corner of the bottom of the unit.
UL Rack Mounting Guidelines
The following Underwriters Laboratories (UL) guidelines pertain to the safe installation of
the MVC 121 Plus in a rack.
1. Elevated operating ambient temperature — If 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 unit 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 a rack so that the amount of air flow
required for safe operation of the equipment is not compromised.
3. Mechanical loading — Mount the equipment in the rack so that a hazardous
condition is not achieved due to uneven mechanical loading.
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 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 (e.g. use of power strips).
Rack Mounting
For optional rack mounting, do not install the rubber feet. Mount the MVC 121 Plus on a
19” Universal 1U or Basic rack shelf (Extron RSU 126, part #60-190-10; or Extron RSB 126,
part #60-604-10).
To rack mount the MVC 121 Plus:
1. If rubber feet were previously installed on the bottom of the MVC 121 Plus, remove
them.
2. Mount the MVC on the rack shelf, using two 4-40 x 3/16 inch screws in opposite
(diagonal) corners to secure the unit to the shelf.
MVC 121 Plus • Reference Information 52