Extron Electronics PCM 340 User Manual

PCM 340 • Installation Guide

T-frame

X"

Y"

Minimum and
Maximum
Throw Distance Marks

Projector
Front

IMPORTANT SAFETY INSTRUCTIONS

When using this accessory, basic precautions should always be followed, including the following:

WARNING: Risk of Personal Injury. Maximum setup load for the PCM is 50 lbs (22.7 kg).

SAVE THESE INSTRUCTIONS

NOTE: Refer to local building standards and codes to verify that the installation will meet the regulatory requirements.

Observe all local and national building and safety codes, UL requirements, and ADA accessibility guidelines.

WARNING: Risk of Personal Injury and property damage. Do not exceed specified weight limits of any component of

the installation. Follow the manufacturer's specifications and installation instructions.

Read all instructions before starting installation.

The Extron PCM 340 Drop Ceiling Projector Mount is used for hanging
PoleVault® System AV products and various projectors.

The PCM is installed above the drop ceiling and secures the adjustable
pipe in a pass-through pipe adapter plate. The pipe then supports the
mounting of the Extron PMK 550 and UPB 25 projector bracket.

The key components of the PCM 340 are shown in figure 1.
Also included in the kit are:
4 turnbuckles, 5 lag eye bolts, 5 concrete anchors, 2 cable clamps,
1 safety wire – 15 feet, 2 tie wires – 30 feet, 4 T-frame screws, 2 set
screws,1 location screw, 4 adhesive pads, 11 hole plugs, 1 escutcheon
ring, (1) 25 inch slotted projector pipe with 1 snap-in trim piece.

1-gang and 2-gang Accessory Mounting
Points (for Power Sockets, for example)

Pipe

Adapter
Pipe Adapter Plate
Wing Nuts (4)

T-frame
Securing
Screws (4)

Base
Plate

Pipe Adapter
Set Screws (2)

Pre-Installation

Determine the exact location of the installation on the drop ceiling.
Consider the following:

• The vertical and horizontal offsets of the projector from the proposed

• The projector dimensions relative to the image target.

Installation

location.

NOTE: See the projector manual for details.

Step 1 — Mark the Frame and Cut the Ceiling Tile.

a. At the location for the projector, identify the ceiling tile and T-frame

where the PCM will be installed.

b. Remove the predetermined ceiling tile and mark the maximum and

minimum throw distances of the projector on the T-frame (see
figure 2).

TIP: Mark the screen direction on the back of the tile to

help with orientation of the tile when replacing it after
cutting�

If it helps, create more working space by removing the adjacent
tiles.

c. Place the PCM base plate over the T-frame, between the two marks.

Lightly tighten the T-frame securing screws (which can be inserted
on the inside or outside of the PCM).

d. Mark the location of the PCM base plate on the T-frame to aid in

replacing it in the correct location.

Figure 1. PCM 340 Parts

Figure 2. Minimum and Maximum

Throw Distances

1

PCM 340 • Installation Guide (Continued)

e. Measure the distances X and Y (see figure 2) from the inner vertical

section of the front and left T-frame runners to the center of the Pipe
Adapter Plate.

f. Using these dimensions, mark and cut a hole (using a 2 inch

hole saw) for the projector pipe in the removed ceiling tile (see figure 3).

g. If required, to prepare the ceiling tile for a power outlet, use the PCM

plate to trace and cut out the 2-gang hole in the ceiling tile for a
UL approved RACO® junction box.

If this is not required, proceed to step 3.

TIP: Install any optional power outlets in the 2-gang opening on the

mounting plate, towards the outside edge of the mount, so
they do not interfere with the PMK 550 when installed.

Step 2 — Install the Electrical Box.

The following method is recommended for integrating a 4S RACO electrical
box (not supplied) on the PCM base plate (such as a RACO 231, 2 1/8 inch
deep, 4 x 4 inch electrical box and a RACO 778, 1/2 inch raised, 4 x 4 inch
plaster ring.

Install the RACO box on the PCM plate as follows:

a. Attach the box to the plate, using the smallest notches in opposite

corners of the cut-out (see figure 4). Do not tighten the screws fully
at this time.

b. On the room side of the tile, slide the plaster ring under the screws.

c. Fully tighten the screws

Top Side

Underside

Figure 3. Mark and start cutting on

underside. Finish on top
side.

Raco 231

Use the smallest
notches when
attaching the
Raco box.

WARNING: Risk of Personal Injury. For safety, complete all wiring

of the electrical boxes and accessories after the plate
is installed and secure.
All electrical installation should be done by a qualified
electrician.

NOTE: If installing a single-gang electrical box, use a Raco 503

junction box�

Step 3 — Secure the PCM Base Plate to the Ceiling.

Tie wire installation

a. Replace the cut ceiling tile, and temporarily replace the PCM base plate

over the ceiling tile.

b. Check the orientation and tile hole alignment hole(s) with the PCM

adapter plate by pushing the slotted pipe up through the hole into the
adapter plate.

c. When adequately satisfied the plate and hole align, remove the pipe.

d. Attach the four turnbuckles to the mounting plate, one at each corner.

ATTENTION: Risk of Personal Injury and property damage.

• DO NOT rest or lean on the mounting plate or
suspended ceiling when attaching the turnbuckles
and tie wire, or when drilling into the ceiling.

• For safest installation, insert the turnbuckle from
the outside so that it hooks inwards.

e. Mark and drill four holes, approximately 1¼ inch (32 mm) deep into

the ceiling joists, using a 1/4 inch (6.4 mm) diameter drill bit. Do this at
10 degrees out from vertical. Drill a fifth hole centered above the PCM
for the safety cable (see figure 5). The minimum joist size used should
be 2 inches by 4 inches.

Figure 4. Install RACO Box and

Plaster Ring.

Attach safety cable
to center holes and
secure with cable

10

clamps.

o

Attach tie wire
to the turnbuckles
and eye bolts.

Drill holes and
attach tie wires
10° out from
vertical.

Figure 5. Attach Tie Wire and Safety

Cable.

Raco 778

2