l2d0 pages

Low Voltage Differential to
High Voltage Differential Converter
Specifications
Transfer Rate
40 Mbytes/sec - Ultra SCSI
Approx half actual size

LVD2HVD
The LVD2HVD is a low-voltage differential (LVD) to highvoltage differential (HVD) converter.
Unlike some
converters, the LVD2HVD is true LVD and does not
degrade to a single-ended (SE) SCSI bus. The small format
PCB is full speed Ultra Wide SCSI capable and designed for
convenient integration into most common enclosures.

Physical Size
50mm x 147mm
Temperature Range
0ºC to 60ºC
Power Requirements
+5V ±5% 5Watts typical. Standard
3.5” minature power connector
Connectors
Standard 68-way SCSI III female

Features

Informative LED’s Indicate:
Presence of termpower for each bus
Bus error - where a device of the wrong type is

Ultra SCSI capable.

plugged into either bus

SCSI bus activity

Initiators and Targets may be placed on either side of the device.
Does not consume a SCSI ID.
Transparent operation, Independent of host software.
LVD side switches to Single-ended mode automatically if plugged into a SE bus.
Hot-Swap mode, where each side can be electronically isolated.
Integral Multimode LVD terminators that sense the LVD bus and switch to SE mode as appropriate.
Supplies terminator power out to each bus via a jumper and restable fuse.
SCSI bus signals are re-generated and re-timed.

Applications
To connect:
HVD SCSI peripherals to an LVD or SE controller.
LVD SCSI peripherals to an HVD controller so that the LVD bus remains true LVD.
SE SCSI peripherals to an HVD controller.

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Other uses:
Creating bus segments that are electrically isolated from each other.
Bus Extending, where an LVD SCSI bus can be lengthened to 100m by adding converters in serial fashion.
Enabling Server Clustering.

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Peripheral Vision (Technology) Ltd.
4 Zephyr House, Calleva Park, Aldermaston, Reading, RG7 8JN England.
Phone: +44 (0)118 982 0432 Fax: +44 (0)118 982 0426
E-Mail: sales@peripheral-vision.com Web: www.peripheral-vision.com