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UL Rack-Mounting Guidelines
The following Underwriters Laboratories (UL) requirements pertain to the installation of the
unit into a rack.
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Disconnecting the Ground
If you cannot resolve a ground potential difference between the switching transmitter and
receiver installation sites (as suggested by a missing or unstable picture), remove the ground
connection between the units as follows:
NOTE: Once you have removed the ground jumpers, the DTP T USW 233 cannot
1.
2.
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. Therefore, consider installing the equipment in an environment
compatible with the maximum ambient temperature (TMA = +122 °F, +50 °C) specified
by Extron.
Reduced air flow — Installation of the equipment in a rack should be such that the
amount of air flow required for safe operation of the equipment is not compromised.
Mechanical loading — Mounting of the equipment in the rack should be such that a
hazardous condition is not achieved due to uneven mechanical loading.
Circuit overloading — Consideration should be given to the connection of the
equipment to the supply circuit and the effect that overloading of the circuits might have
on overcurrent protection and supply wiring. Appropriate consideration of equipment
nameplate ratings should be used when addressing this concern.
Reliable earthing (grounding) — Reliable earthing of rack-mounted equipment
should be maintained. Particular attention should be given to supply connections other
than direct connections to the branch circuit (such as use of power strips).
extend analog audio and one unit cannot remotely power the other. No analog audio
is output and the paired receiver requires its own dedicated power supply.
Disconnect any cables and remove the switching transmitter from any rack or other
installation option.
Remove and retain the screws (nine screws, three on each side and three on top)
securing the cover to the switching transmitter. Slide the cover forward slightly and lift it
off the unit (see figure 11).
TIP:
Be careful not to bend the electrical contact "legs" of the button and LED
assemblies on the circuit board. If the buttons or LEDs are misaligned with the
holes in the cover, it may be difficult to reassemble the switcher.
Remove 9 Screws
Figure 11.
Opening the Switching Transmitter
DTP T USW 233 • Reference Information
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