MDS Orbit MCR-4G, Техническое руководство

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MDS 05-6628A01, Rev. B MDS Orbit MCR-4G Technical Manual 9
2.4.1 Grounding Considerations
To minimize the chance of damage to the unit and any connected equipment, a safety ground (NEC
Class 2 compliant) is recommended which bonds the chassis, antenna system(s), power supply, and
connected data equipment to a
single-point ground, keeping all ground leads as short as possible.
Normally, the unit is adequately grounded if mounted with the flat brackets to a well-grounded
metal surface. If the unit is not mounted to a grounded surface, it is recommended that a safety
ground wire be attached to the threaded ground hole provided at the bottom of the enclosure. Alter-
natively, a safety ground wire may be attached to one of the mounting brackets.
The use of a lightning protector is recommended where the antenna cable enters the building; Bond
the protector to the tower ground, if possible. All grounds and cabling must comply with applicable
codes and regulations. One source for lightning protection products may be found online at
http://www.protectiongroup.com/PolyPhaser.
2.4.2 Mounting Options
The unit may be mounted with flat mounting brackets or an optional 35 mm DIN rail attachment.
Figure 7 shows the mounting dimensions for a unit equipped with flat mounting brackets.
Invisible place holder
Figure 7. Flat Mounting Bracket Dimensions
NOTE:
To prevent moisture from entering the unit, do not mount the case with the cable connectors
pointing up. Also, dress all cables to prevent moisture from running along the cables and into the
unit.
2.4.3 Optional DIN Rail Mounting
If ordered with the DIN rail mounting option, the unit is supplied with a DIN rail clip attached to
the case. The integrated bracket on the unit’s case allows for quick installation and removal from
a DIN mounting rail as shown in
Figure 8 .
8.5” (21.59 cm)
9.25” (23.5 cm)
4.81” (12.22 cm)