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General Information
1
XR900 Enclosure
1-2
For base chassis that have no built-in drive bays (e.g., the 20- and
dual 9-slot versions) or for applications that require additional
storage capacity in a mix of 5
and standalone SCSI peripheral expansion enclosures are available.
The integral enclosure is described in the Modular VME System
Chassis User's Manual. The standalone unit (the XR900 enclosure) is
presented here.
There are two versions of the XR900 enclosure: the Single Ended
XR900 and the Differential XR900. The Single Ended version
accommodates 3
1
-inch and 5
/
2
hard disk drives, floppy disk drives, streaming tape drives, or CD-
ROM devices, as follows:
Two bays for 3
1
Two bays for 5
1
The Differential version accomodates 3
differential SCSI hard disk drives as follows:
Two 3
/
-inch drive bays for differential hard disk drives
1
2
Two 5
/
-inch drive bays for differential hard disk drives
1
4
The differential enclosure only supports differential
Note
hard drives.
The XR900 is adaptable to both rack/mast and pedestal
installations. It is equipped with its own power supply, available in
versions for –48Vdc as well as for 115/230Vac inputs. For proper
airflow and regulatory compliance, a front bezel is supplied as
standard equipment for the enclosure.
The XR900 chassis is linked to its controller or host computer (the
associated Modular Chassis system) by an SCSI cable and (if the
environmental monitor function is to be used) an RJ45 cable. All
/
-inch and 3
1
4
1
/
-inch SCSI storage devices, such as
4
/
-inch hard disk drives
2
/
-inch or 3
1
-inch removable-media devices
/
2
4
1
-inch and 5
/
2
-inch drives, integral
1
/
2
1
/
-inch
4
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