Calrec Hydra2, Руководство по установке

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72 HYDRA2
Installation Manual
Modular I/O
MODULAR I/O RACK
Modular I/O racks are 3U rack-mount
enclosures with 20 I/O card slots
that can be populated with a mixed
range of I/O cards, allowing for a
custom selection of I/O quantities
and formats.
Modular I/O racks connect to a Hydra2
network in the same way as Fixed Format
I/O. Multiple modular I/O racks can co-
exist on a Hydra2 network alongside fixed
format I/O, if required, in order to make
up the quantity of I/O in the format and
location needed.
Power
Each modular I/O rack is fitted with 2 x
rear mounted AC PSUs, each with its own
AC IEC input, operating from 100–240
V AC 50/60 Hz. Either PSU can power
the whole rack; two are fitted in order to
provide redundancy. Where possible, each
PSU should be fed from a separate AC
source in order to provide redundancy
against both PSU failure and external AC
mains loss. Units are supplied with an IEC
‘Y-cord’ to allow both PSUs to be fed if
only a single AC outlet is available.
Earthing
Chassis earth studs are fitted to each
PSU cover. These should be connected to
ground using earth cable of at least 6mm
2
cross-section (10 AWG).
Airflowandmounting
The unit is a 19” rack-mount enclosure
designed for mounting into standard
equipment bays. Rear/side supports
should be considered in order to avoid
excessive stress on the front racking
angles, particularly if fitted into a mobile
installation
A recessed air-intake grill runs across
the bottom of the rack. The rack can
be mounted directly under or on top of
another unit or surface—the recessed
design of the intake allows sufficient air to
be drawn in from the sides (see diagram)
to cool the rack. Both side facing inlets
should be left unobstructed.
Low noise fans fitted to the PSU modules
pull air through the rack, venting to the
rear. The fan grills at the rear of the rack
should be unobstructed with sufficient
clearance for air to vent. Fans on both
PSUs will operate, even if only one PSU is
active, to ensure even airflow in the event
of a PSU failure. To minimize fan noise
and longevity, modular I/O fan speed is
under variable control depending on the
temperature within the rack. SDI cards run
notably hotter than other card types and
therefore a rack populated with a large
number of SDI cards will generate the
most fan noise.
RecessKit
Recess kits are supplied as standard with
Modular IO boxes, which allow them to be
fitted, either flush to the front of the rack,
or recessed as shown in the diagram on
the next page.
HydraIDs
Unlike fixed format I/O, the Hydra ID is
set using a DIP switch on the interface
card fitted within the rack which needs to
be removed in order to change the HID.
Please refer to the Modular I/O Hydra2
Interface section for more details.
Fittingandremovingcards
It is essential to ensure EMC precautions
are observed before removing or handling
modular I/O cards. Any static should be
discharged from the person by touching
an earthed piece of metal, or preferably
by wearing an ESD wrist-strap prior to
handling. Cards should only be handled by
their edges or front panels and should be
worked on ESD protected benches and
stored in EMC protected bags. Failure to
observe EMC precautions will invalidate
warranty.
Cards are secured by top and bottom
front panel screws and can be removed
by pulling on the screws once they are
unfastened. Do not pull on connectors or
cables.