Extron electronic Network Card MR D Series User Manual

MR and MR D Series Installation Guide  
This guide provides procedures for installing and modifying the Extron MR (standard) and MR D (Decora®) series plastic  
mounting brackets (mud rings).  
Dogleg  
Assembly  
Mud Ring Components  
Top/bottom  
Segment  
Each mud ring kit includes an expansion  
kit consisting of two small top/bottom  
segments that allow the bracket to be  
Device Mount  
enlarged or reduced to the next larger or  
smaller gang size. (See “Modifying a Mud  
Ring,” on the next page.)  
Screw Hole  
Side  
Segment  
Segment  
Assembly  
Screw  
Figure 1 shows the parts of the  
MR/MR D mud rings.  
Surface Mount  
Screw Hole  
Top/bottom  
Segment  
Figure 1 — MR mud ring elements  
Installation  
Determining the installation location  
The UL-listed MR series mud rings do not need to be fastened to wall studs, so they can be placed almost anywhere on a  
wall or other mounting surface. When you are deciding where to install the device and mud ring, consider the placement of  
the cable(s) and access. You may need to install the cables before you install the bracket.  
N
The mud rings fit properly in hollow wall thicknesses ranging from 1/4" (0.63 cm) to 1” (2.5 cm).  
The MR series mud rings are UL-listed for low-voltage applications only.  
W
Preparing the site and installing the mud ring using the doglegs  
1.  
2.  
3.  
4.  
See the to-scale cutout template included with the mud ring to determine the cutout dimensions for your mud ring.  
Tear the cutout template along the perforations for the appropriate mud ring size.  
Place the template against the surface to be cut, using a level, if necessary, to keep the template even. Trace around the  
template.  
Carefully cut away the mounting surface  
material inside the traced template lines.  
NOTE Do not disassemble the dogleg  
from the dogleg screw. Rotate the  
dogleg out of the way to insert the  
mud ring into the wall.  
Test the fit of the mud ring. The doglegs  
should fit easily into the hole and the flat  
portion should rest flush against the wall.  
See the note in figure 2, at right.  
Dogleg  
Screw  
5.  
6.  
7.  
Rotate all doglegs inward.  
Insert the mud ring into the hole.  
Extron  
MR 200D  
Modular Mud Ring  
Tighten all of the dogleg screws until  
the doglegs clamp the mud ring to the  
mounting surface. Do not overtighten.  
Standard mud rings only: If you are going  
to screw the mud ring to the surface, rather  
than using the detachable doglegs, mark  
the four surface mounting screw holes at  
the corners of the mud ring. See figure 2, at  
right.  
Rotate doglegs  
and insert mud  
ring into wall  
opening.  
Surface Mounting  
Hole  
Equipment Mounting  
Holes  
Figure 2 — Installing an MR mud ring  
68-1190-01 Rev. D  
03 08  
 

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