Extron Electronics DMP 44 LC User Guide - Manual (Page 76)

UL Rack Mounting Guidelines
The following Underwriters Laboratories (UL) guidelines pertain to the safe installation of
the DMP 44 LC 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 (such as the use of power strips).
Rack Mounting
For optional rack mounting, do not install the rubber feet. Mount the DMP 44 LC on
a 19” Universal 1U or Basic rack shelf (Extron RSU 126, part number 60-190-10; or
Extron RSB 126, part number 60-604-11).
To rack mount the DMP 44 LC:
1. If rubber feet were previously installed on the bottom of the DMP 44 LC, remove
them.
2. Mount the DMP 44 LC on the rack shelf, using two 4-40 x 3/16 inch screws in
opposite (diagonal) corners to secure the unit to the shelf.
Use 2 mounting holes on
opposite corners.
(2) 4-40 x 3/16"
Screws
1U Universal Rack Shelf
Both front false faceplates
use 2 screws.
QuarterRackStandardShelf
1/4 Rack Width Front False
Faceplate
1/2 Rack Width Front False
Faceplate
Figure 34. Mounting the DMP 44 LC on a Universal Rack Shelf
DMP 44 LC • Reference Information 70