Bedienungsanleitung Midas DL461 Router (Seite 52 von 64) (Englisch)

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38 Appendix D: Setting Up An XL8 System

DL461 Router

Operator Manual

Outboard equipment racks

To ensure the correct installation and function of the outboard equipment, such as the

DL4n1 units and DN9696 recorder, the racks must meet the following general

requirements.

• Shock mounting (for non-installation environments): The racks must provide

adequate shock protection of the units they house by incorporating appropriately-

designed shock protection methods, for example, a foam-suspended rack or a frame

suspended on anti-vibration mounts etc.

• Ventilation: The XL8 rack units have been designed such that their internal

ventilation airflow is drawn in through the front of the unit and expelled though the

rear. To facilitate this, rack design must ensure that cool air can flow freely through

the rack in the same direction, that is, in through the front of the rack and out

through the rear. Situations where the air flows in a circular direction around and

through an XL8 unit must be prevented. Midas recommends that racks with fully

opening front and rear doors are used.

Note: Never combine units in the same rack that have been designed for a

ventilation air flow direction other than that for the XL8 units. To avoid this, we

recommend that any non-XL8 units are housed separately.

• Rack mount supports: Always secure the rear of the XL8 units to the rack via their

rear rack mount support brackets. These brackets are fitted to every XL8 unit and

are recommended for use in touring applications. The rack mount support fixing

hole centres are at a depth of approximately 395 mm from the front panel (this

dimension may differ slightly on the DN9696).

• Handles on rack case: You must ensure that there are sufficient external handles

fitted to the rack casing to enable the rack to be manoeuvred easily and safely, and

by the amount of personnel suitable for the task. Also, these handles must be fit for

purpose.

• DSP rack only: Midas strongly recommends that the DSPs and routers are housed

in a single rack, that is, stage rack 2 (see “Stage rack 2” on page 39). This rack can

be either a 16U high (minimum) rack or configured as an 8U double rack.

• Clearance at rear of units: To ensure an adequate clearance at the rear of the

units, we recommend that the rack depth, that is, the distance from the front rack

strip to the rear of the rack, is a minimum of 700 mm. This is to provide sufficient

free space to enable the DSP link cables to achieve their minimum bend radius.

• Securing the cables: We recommend that the

cables at the rear of the units be tidied using

lacing bars and cable ties. This should provide

optimum access to the rear of the units for

connecting other cables, switching the units

on/off etc., and give maximum visibility of the

units’ LEDs for determining communication

status, link status, condition of audio etc. The

picture (right) shows a good example of how

this can be done. For more information on

cabling, refer to “Stage rack 2” on page 39.

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