Crestron Lighting Control System, Design Manual

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Control System Crestron Lighting
Step 3: Enclosure Selection
Crestron home automation enclosures contain the control devices of the lighting
control system (excluding the user interfaces). These enclosures also provide a
centralized location in which to install other home automation equipment. Crestron
enclosures are constructed of 16-gauge galvanized steel and are UL and C-UL listed.
Enclosures can be flush mounted or surface mounted.
The wide range of sizes, mounting options, and convenient electrical knockouts,
ensure mounting location flexibility, efficiency and an orderly installation.
NOTE: CAEN-Series enclosures are required to install CLX-Series lighting
modules.
The lighting designer identifies the CAEN-Series enclosure(s) required, based on the
number of module spaces counted in step 2 and the AC power distribution of the
system. Enclosures may be all centrally located in one area or distributed throughout
the home. Distributing the enclosures throughout the home reduces the run-length of
high-voltage wires to the loads.
Enclosures have a specific number of module spaces for CLX-Series modules, the
control processor, and CAEN-UMP mounting plates.
Enclosures that do not contain a PAC2 control processor require a CAEN-BLOCK
communications link, which is installed in the bottom of the enclosure and not
installed in a module slot. Therefore the CAEN-BLOCK is not included in the
calculation of enclosure size.
Consider selecting enclosures with excess room to accommodate system
improvements and expansion. Crestron recommends selecting an enclosure that has
at least one more space than needed, allowing for changes in modules or lighting
fixtures. A larger enclosure also enhances air-cooling.
The CAEN-7x2 is the largest and most economical enclosure, containing up to 12
modules and a PAC2 processor. Without the PAC2, this enclosure can hold up to 14
modules (assuming a fully loaded enclosure with 14 CLX-1DIM8s, a maximum of
112 dimmers).
There are occasions when a separate enclosure is desired for the PAC2. The
processor can be located in a more accessible location with better temperature
control and easier access to the wiring. In this situation, Crestron recommends using
the CAEN-2x1 enclosure for the PAC2.
Single-width enclosures fit between 16” on-center stud framing. Using several
CAEN-7x1 enclosures, flush mounted between the studs, creates a clean, in-wall
installation. When surface mounting the enclosures, allow at least 6” (15cm) side-to-
side clearance between enclosures.
The design of the CAEN-Series enclosures separates high-voltage and low-voltage
wiring when the control processor is installed. The low-voltage openings in the
bottom of the enclosure are insulated to protect low-voltage wires from cuts and
scrapes. The airflow through the perforated cover assists in the dissipation of heat.
Refer to the following tables for a listing of dimensions and maximum number of
modules that can be contained in each CAEN-Series enclosure.
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Lighting Control System Design Design Guide – DOC. 5999A