Using LVD/MSE Devices in an Existing HVD System

LVD/MSE or single-ended devices can be easily added to an existing HVD SCSI segment by attaching a Series 80 LVD/MSE to HVD Converter to the SCSI chain, and adding the LVD and/or single-ended devices to the LVD port of the Converter. The Converter will not consume a SCSI ID, and the system will operate with no compromise of thruput.

HVD Devices can be added to an LVD/MSE or Single-ended system simply by adding a Series 80 LVD/MSE to HVD Converter, attaching the HVD SCSI segment to the HVD port of the Converter. The Converter will not consume a SCSI ID, and the system will operate with no compromise of thruput.

Using two Converters in a Back-to-Back Connection – This configuration works well for both LVD and single-ended devices, and for mixed devices. A full 50m (164 feet) of cable can be placed between the SCSI Expanders, for up to 74m (240 feet) overall for all-LVD bus.

Multimode LVD SCSI will automatically change to Single-Ended (SE) if an SE device is on the same bus segment. However, neither LVD nor SE SCSI can directly communicate with HVD SCSI. A Series 80 Model MH16 or MH17 LVD/MSE to HVD SCSI Converter enables this type of communication by converting the LVD or SE SCSI to HVD or vice versa. The presence of a Series 80 SCSI Converter will not decrease data thruput.

Paralan SCSI Converters and SCSI Expanders are completely compatible with all devices that conform to the full ANSI X3T10 standard. They are available either as stand-alone units utilizing wall power, or as board-level units for installation in other equipment.

Isolation for Hot Swapping

The logical isolation between the two sides of a Series 80 SCSI Converter allows a device on one side, for example, to be disconnected without disturbing the other side.

Narrow/Wide Conversion

The MH16 and MH17 (wide) models may be used to interconnect narrow SCSI devices on one side, for example with wide SCSI on the other side. This method assures proper termination on both bus segments.

Operation as an LVD/MSE SCSI Extender

Two Paralan MH16 SCSI Converters can extend an LVD/MSE or single-ended SCSI bus up to 74 m / 240 feet. Place each Converter within 12 m / 40 feet of the most distant device in one LVD SCSI segment (1.5 m / 5 feet for Ultra SCSI, 3 m / 10 feet for fast SCSI, 6 m / 19 feet for standard SCSI). Then connect up to 50 m / 160 feet of differential SCSI cable between them.

SCSI bus Fiber Optic Extenders

Paralan is the world’s leader in SCSI extension. If your needs require longer lengths than those managed by Series 80 SCSI Expanders, Paralan offers many models of Fiber Optic SCSI Extenders that extend the SCSI bus up to 4 km – 2-1/2 miles.