NSI DS8/DS12 MODULAR DIGITAL DIMMING SYSTEM
Software Revision 1.1x, 8/24/99
- 2 -
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Mounting
The DS dimmer packs are designed to be mounted in a standard 19" EIA rack. The packs are provided with two
mounting flanges or ears, which are designed for securing the pack to the front rack mounting rails. The pack may
also be operated as is on top of a sturdy table or shelf.
An optional rear support kit is available and should be used in portable, or rough handling rack mount applications.
The NSI DS dimmers depend on forced air cooling, therefore the following installation rules apply:
1. The rack enclosure shall maintain a 2 inch minimum clearance on the entire right side of the dimmer
rack enclosure for air exhaust. The rack enclosure must not be sealed, and must maintain an air
exhaust clearance area of at least 15 square inches per installed pack for air to flow back to the
ambient room.
2. If the optional rear support kit is used, the right rear support bracket must be cropped to a length
that does not block any of the air exhaust vent on the right side of the rack, once the pack is installed.
Support bracket length can vary depending on cabinet construction and manufacturer, therefore the
bracket should be cropped upon installation.
3. The intake manifold on the front of the dimmer pack cannot not be blocked for any reason.
4. The thermal operation of the dimmer pack will depend on its conditions of installation. Ambient
room temperature must never exceed 104 degrees F or 40 degrees C.
WARNING: If any of the cooling rules above are violated, the packs could suffer permanent damage not
covered under warranty.
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