Compaq S5 - Manual (Page 14)

DWZZH 16-Bit UltraSCSI HUB (Rack-Mountable)
1–4 EK–SMDZS–UG. B01
1.3 Product Specifications
Table 1-1 lists the functional specifications for the DWZZH Hub.
Table 1–1 UltraSCSI Hub Functional Specifications
Feature Specification
SCSI ID
SCSI Addresses 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.
Overload Protection
DTERMPOWER
STERMPOWER 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.
Shielding, Enclosure &
Connectors
Shielded for ESD, EMI, and safety requirements.
Power-Up Reset 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
Differential SCSI Bus
Length
Ultra (20 megatransfers
per second or 40 MB/s) 25 meters (82 feet) per segment. Refer to Chapter 2,
Section 2.2 Configuration Note for more information
regarding cabling distances.
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