Ultrascsi Hub Functional Specifications; Product Specifications - Compaq S5 User Manual

DWZZH 16-Bit UltraSCSI HUB (Rack-Mountable)
1.3

Product Specifications

Table 1-1 lists the functional specifications for the DWZZH Hub.
Table 1–1 UltraSCSI Hub Functional Specifications
Feature
SCSI ID
SCSI Addresses
Overload Protection
DTERMPOWER
STERMPOWER
Shielding, Enclosure &
Connectors
Power-Up Reset
SCSI Bus Reset
Differential SCSI Bus
Length
Ultra (20 megatransfers
per second or 40 MB/s)
Data Timing
Design
1–4
Specification
The small UltraSCSI Hub does not use a SCSI ID.
The large UltraSCSI Hub uses SCSI ID 7 for arbitration,
when the fair arbitration option is enabled.
TERMPOWER is not supplied by the UltraSCSI Hub.
Internal TERMPOWER is protected via a resetable fuse.
TERMPOWER must be supplied from the remote
connection to enable
each Hub port.
Shielded for ESD, EMI, and safety requirements.
Automatically clears:
Initiator detection circuit
Target detection circuit
BSY glitch filter
Automatically clears:
Initiator detection circuit
Target detection circuit
BSY glitch filter
25 meters (82 feet) per segment. Refer to Chapter 2,
Section 2.2 Configuration Note for more information
regarding cabling distances.
The relationship between the data and the control
signals is brought to SCSI compatibility before
transmission to the other SCSI bus.
High reliability SMT
EK–SMDZS–UG. B01