26 | Medalist Pro Installation Guide, Rev. B |
Figures 3a, 3b, 3c, and 3d show typical drive connections. The following table lists the maximum cable lengths and number of devices with single-ended I/O circuits allowed on a daisy-chain cable for <10 and <20 M transfers/sec I/O data transfer rates.
Table 4a. Interconnect characteristics for single-ended I/O circuits
| Maximum distance between | |||
Number of attached SCSI | terminators (meters) [1] [3] | |||
devices | ||||
|
|
|
|
|
1 to 4 maximum capacitance | 6 | 3 | 3 | N/A |
(25pF) SCSI devices |
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|
|
|
|
|
|
|
5 to 8 maximum capacitance | 6 | 3 | 1.5 | N/A |
(25pF) SCSI devices |
|
|
|
|
|
|
|
|
|
9 to 16 maximum capacitance | 6 | 3 | [2] | N/A |
(25pF) SCSI devices |
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|
|
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|
|
[1]For environments where all elements of the bus (cables, device inter- faces, environmental noise and other parameters) are controlled to be better than minimally required, it may be possible to extend the path length and device count.
[2]Extending the device count beyond eight requires specification con- trol beyond the minimum specified in the ANSI T10/1302D docu- ment. It is recommended that the devices be uniformly spaced between terminators with the end devices located as close as possi- ble to the terminators.
[3]Values specified by data rate shall apply even if a slower data rate is negotiated.
