Extron electronic Extron Electronics Music Mixer DMP 44 LC User Manual

The following Underwriters Laboratories (UL) guidelines pertain to the safe installation of 
the DMP 44 LC in a rack.

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. 

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. 

Mechanical loading — Mount the equipment in the rack so that a hazardous 
condition is not achieved due to uneven mechanical loading.

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.

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). 

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:

If rubber feet were previously installed on the bottom of the DMP 44 LC, remove 
them.

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.

1/4 Rack Width Front False
Faceplate 

1/2 Rack Width Front False
Faceplate