CTL208CM Control Panel Module • Installation
CTL208CM Control Panel Module • Installation
Installation, cont’d
The installation must conform to national and local electrical
codes and to the equipment’s size requirements.
Installation using a UL listed wall box (available from Extron) is
recommended for most mounting options, but the optional wall
mounting bracket can be used instead. All wall boxes must be
at least 2.5” (6.4 cm) deep.
Before using the wall mounting bracket, verify that the
installation conforms to national and local electrical
codes.
Prepare the site as follows:
1.If your wall box or mounting bracket includes a paper
template, cut out the indicated portions of the template. If
the wall box or mounting bracket does not include a
template, use the wall box or bracket itself to size the hole.
2. Place the template, wall box, or mounting bracket against
the installation surface, and mark the guidelines for the
opening on the wall or furniture.
3. Cut out the wall/furniture material from the marked area.
4. Check the opening size by inserting the wall box or
mounting bracket into the opening. The box or bracket
should fit easily into the opening. Enlarge or smooth the
edges of the opening if needed.
5a.If you are using a wall box, feed cables through the wall
box punch-out holes, and secure them with cable clamps to
provide strain relief.
Exposed cable shields (braids or foil) are potential sources
of short circuits. Trim back and/or insulate shields with
heat shrink (figure 2-2).
Metal Wall Box
Screw
Braided Shield
Install Cable
Foil Shield
Cable Clamp

Figure 2-2 — Grounding outer braided and foil shields

To prevent short circuits, the outer foil shield can be
cut back to the point where the cable exits the cable
clamp. Both braided and foil shields should be
connected to an equipment ground at the other end
of the cable.

2-52-4

UL Requirements for Wall Box Installation
The following Underwriters Laboratories (UL) requirements
pertain to the installation of the CTL208CM into a wall or
furniture (figure 2-1).
2.5"
Installation
Cable
Conduit
Extron
CTL208CM
Control Module
Extron
RGB 478 Mxi
Interface
WITH ADSP™
RGB 478 Mxi
MONITOR
H. SHIFT
INPUT SELECT
MIN/MAX
AUDIO 1
AUDIO 2
INPUT 1
FOLLOWS
MONITOR
INPUT 2
INPUT 1
1
2

Figure 2-1 — CTL208CM in a four-gang wall box

1. These units are not to be connected to a centralized DC
power source or used beyond their rated voltage range.
2. These units must be installed in UL listed junction boxes.
3. These units must be installed with conduit in accordance
with the National Electrical Code.
Wall Mounting Site Preparation
The control panel module can be mounted in a wall-mountable
four space mini-AAP A/V connector panel (such as a one-gang
CPM101) and then set into a wall with either a standard stud-
mounted wall box or with a wall mounting bracket (IN9181).
The control panel module can also be mounted to any wall-
mountable Extron device that incorporates a four space A/V
mini-AAP connector panel, such as a three-gang RGB 468 Mxi.
See Mini-AAP mounting options in Appendix A, Reference
Information, for a partial list of devices that can accept four space
mini-AAPs.
Choose a location that allows power cable and serial control
cable runs without interference. Allow enough depth for the
wall box and the cables. You should install the cables in the wall
or furniture, with or without conduits, before installing the
mounting bracket or wall box.