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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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Internal Settings
ATTENTION:
There are two internal jumpers used to configure the DTP2 ground lift and remote power.
The jumpers have the following numbering scheme and function:
Jumper
Ground Lift:
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Rx — J2
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Tx — J9
48 VDC Remote
Power:
Rx — J3
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Tx — J12
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).
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Use electrostatic discharge (ESD) precautions (be electrically grounded) when
making connections.
Prenez des précautions contre les décharges électrostatiques (soyez
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électriquement relié à la terre) lorsque vous effectuez des connexions.
Avoid ground potential differences between the transmitter and receiver installation
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sites, which can lead to equipment damage or a missing or unstable picture. If a
potential difference cannot be avoided, remove the ground connection between the
units and locally power both units.
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Évitez les différences de potentiel de mise à la terre entre les sites d'installation
d'émetteur et de récepteur de commutation, qui pourraient endommager
l'équipement ou rendre l'image invisible ou irrégulière. Si une différence de potentiel
ne peut être évitée, enlevez la connexion de mise à la terre entre les unités et
alimentez les deux unités localement.
Function
Closed — Ground is NOT lifted (default)
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Open — Ground is lifted
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On — Remote power is distributed (default)
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Off — Remote power is disabled
Jumper
Pins 1 and 2
1
Closed
3
1
On
3
DTP2 T/R 211 • Reference Information
Jumper
Pins 2 and 3
1
Open
3
1
Off
3
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