Paralan SCSI

  • MH-16 / MH-17
    SCSI LVD/SE to HVD Converters

    ********USE MH-32 / MH-33

    Paralans Series 80 models MH16 / MH17 let you add LVD devices into an existing High Voltage Differential (HVD) system, or utilize existing HVD devices in an LVD/MSE or single-ended system. The Converter may also be used to extend the SCSI bus length of an LVD/MSE system. All this is accomplished without any impact on SCSI protocol or loss of data thruput!
    • Convert Between LVD or
      Single-ended and HVD
    • Extend Bus Length
    • Isolate HVD Segments of a
      SCSI bus
    • Stand-alone and Board-level Versions Available:                
      The stand-alone Model MH16 includes a power supply for standard power line operation.                

      The board-level version Model MH17 is sized to fit in a standard 5.25" drive bay!
      The board-level version Model MH17 is sized to fit in a standard 5.25" drive bay.
      • Targets and initiators may be located on both sides of the Expander                  
      • The Series 80 models are backward compatible with older versions of SCSI
      • Does not consume a SCSI ID

      For a printable version, please see the PDF of this data sheet.
    Specifications
    MH16/17 SCSI Multimode Expander
    Environmental                          
    Relative Humidity: 0 - 95% non-condensing                          
    Operating Temperature: 0 - 50C
    Storage Temperature: 25 to +75C
    Power Requirements                          
    Stand-alone units (MH16):                            
    Voltage:                                 115/220 V ac, auto select                              
    Frequency:                                 50 - 60 Hz
    Board-level units (MH17):                            
    Voltage:                                 5 V dc 5%
    Current:                                 1.5 A max
    Safety Approvals                          
    UL, CSA, TUV, CE                          
    EMI/RFI                          
    FCC Class A, CE                          
    SCSI Connections                          
    MH16, MH17: SCSI-3 68-pin High-Density Alt-3 P Connector                          
    Communication                          
    Parallel Transmission Rate (sustained):                          
    80 Mbytes/sec (16-bit)                          
    Warranty                          
    Two year limited warranty                          
    Weight:                          
    MH16: approx. 2 lb (0,9 kg)                          
    Shipping weight, approx. 4 lb (1,8 kg)                          
    MH17: 2.5 oz (71 g)                          
    Shipping weight, approx. 2 lb (1 kg)                          
    Physical Size (MH16)                          
    Height: 1.6 in. (41 mm)                          
    Width: 4.1 in. (104 mm)                          
    Depth: 4.5 in. (114 mm)                          
    Board-Level Version Dimensions:                          
    Overall board dimensions 4.00 x 3.88 in. (101,6x98,5 mm)
                                See drawing                             for details (20K, PDF)
      

    Interconnect HVD with LVD/MSE Devices

    Paralans Series 80 models MH16 / MH17 let you add LVD devices into an existing High Voltage Differential (HVD) system, or utilize existing HVD devices in an LVD/MSE or single-ended system. The Converter may also be used to extend the SCSI bus length of an LVD/MSE system. All this is accomplished without any impact on SCSI protocol or loss of data thruput.                          

    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.
    Using LVD/MSE Devices in an Existing HVD System!
    Using HVD (High Voltage Differential) Devices in an LVD/MSE System

    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 HVD (High Voltage Differential) Devices in an LVD/MSE System!
    Extending the Bus Length of LVD/MSE

    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.
    Extending the Bus Length of LVD/MSE!
    Mixing SCSI Device Types

    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 worlds 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.

    Ordering Guide                                  

    Model Numbers SCSI Product Description
    Stand-alone Board Version   
    MH16 MH17 SCSI Wide LVD/MSE to HVD Converter (16-bit)
       2811 5-1/4" Half Height Drive Bay Mounting Bracket & Faceplate for MH17
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •