Chapter 1. Introducing the DWZZH UltraSCSI Hub
1.3Product Specifications
Table 1-1 lists the functional specifications for the DWZZH Hub.
Table 1–1 DWZZH Hub Functional Specifications
Feature | Specification | |
SCSI ID | The small UltraSCSI HUB does not use a SCSI ID. | |
SCSI Addresses | The large UltraSCSI HUB uses SCSI ID 7 for | |
| arbitration. | |
Overload Protection | TERMPOWER is not supplied to the external ports | |
DTERMPOWER | of the UltraSCSI HUB. Internal TERMPOWER is | |
STERMPOWER | protected via a resetable fuse. TERMPOWER must | |
| be supplied from the remote connection to enable | |
| each HUB port. | |
Shielding |
|
|
Enclosure & |
|
|
Connectors | Shielded for ESD, EMI, and safety requirements | |
Automatically clears | ||
| ∙ | Initiator detection circuit |
| ∙ | Target detection circuit |
| ∙ | BSY glitch filter |
SCSI Bus Reset | Automatically clears | |
| ∙ | Initiator detection circuit |
| ∙ | Target detection circuit |
| ∙ | BSY glitch filter |
20 meters (66 feet) per segment | ||
Length |
|
|
Ultra (20 megatransfers per |
|
|
second or 40 MB/s) |
|
|
Differential SCSI Bus Length | 25 meters (82 feet) per segment | |
Data Timing | The relationship between the data and the control | |
| signals is brought to SCSI compatibility before | |
| transmission to the other SCSI bus. | |
Design | High reliability SMT | |
