2-3

MPX 423 A • Installation
PRELIMINARY

Rack mounting instructions

To rack mount the switcher:

1. Attach the rack mount brackets to the switcher with the eight #8 machine

screws provided.

2. Insert the switcher into the rack, align the holes in the mounting bracket with

those of the rack.

3. Secure the switcher to the rack using the supplied machine screws.

50/60 Hz
100-240V 0.3A
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RESET
ACTLINK
RS-232
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#8 Screw (4 Plcs)
Each Side
Mounting Screws (2 Plcs)
Each Side
orSupplied BracketOptionalTable / Wall Mounting Bracket
Extron
MPX 423 A
Media Presentation
Matrix Switcher

Figure 2-1 — Mounting the switcher

Furniture mounting the switcher

The MPX 423 A can be mounted under a table or other horizontal surface with an

optional Extron under-desk mounting kit (part #70-222-01).

1. Secure the two table/wall mounting brackets included in the under-desk

mounting kit to the switcher with the eight machine screws provided in the

kit (figure 2-1).

2. Hold the switcher with attached brackets against the underside of the desk,

and mark the location of holes for screws on the underside of the desk.

3. Drill 1/4” (6.4 mm) deep, 3/32” (2 mm) diameter pilot holes in the desk at the

marked screw locations from the underside of the desk.

4. Insert the four wood screws into the pilot holes. Fasten each screw into the

installation surface until just less than 1/4” of the screw head protrudes.

5. Install the slotted holes of the mounting brackets (with the switcher attached)

over the protruding screw heads.

6. Slide the switcher slightly forward or back, then tighten all four screws to

secure the switcher in place.