Installation User guide

2-19
MLC 226 IP Series • Installation
PRELIMINARY
UL rack mounting requirements
The following Underwriters Laboratories (UL) requirements pertain to the safe
installation of the MLC in a rack.
1. Elevated operating ambient temperature — If installed in a closed or
multi-unit rack assembly, the operating ambient temperature of the rack
environment may be greater than room ambient temperature. Therefore,
install the MLC in an environment compatible with the maximum ambient
temperature (Tma = +122 °F, +50 °C) specifi ed by Extron.
2. Reduced air fl ow — Install the equipment in a rack so that the amount of air
fl ow required for safe operation of the equipment is not compromised.
3. Mechanical loading — Mount the equipment in the rack so that a hazardous
condition is not achieved due to uneven mechanical loading.
4. Circuit overloading — Connect the equipment to the supply circuit and
consider the effect that circuit overloading might have on overcurrent
protection and supply wiring. Appropriate consideration of equipment
nameplate ratings should be used when addressing this concern.
5. Reliable earthing (grounding) — Maintain reliable grounding of rack-
mounted equipment. Pay particular attention to supply connections other
than direct connections to the branch circuit (e.g. use of power strips).
Mounting the MLC in a Euro Channel
1. Remove the four faceplate attachment screws and remove the original
faceplate, if applicable.
2. Attach the optional MLM 226 EC or MLM 226 AAP EC faceplate to the MLC
with the screws removed in step 1.
3. With power disconnected at the source, insert the MLC into the Euro Channel.
For wider types of Euro Channels, you may need to insert a spacer plate fi rst.
4. Mount the controller to the Euro Channel by attaching the faceplate to the two
backing plates using four #4-40 mounting screws. See the illustration below.
N
Make sure that the Euro Channel is grounded to an earth ground before
completing the installation.
Extron
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ISPLA
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MEDIALINK
Extron
MLC 226 IP with
MLM 226 EC
Euro Channel
Backing Plate
Mounting the MLC 226 IP to a Euro Channel