Compaq S5 manual Product Specifications, Lists the functional specifications for the Dwzzh Hub

DWZZH 16-Bit UltraSCSI HUB (Rack-Mountable)

1.3Product Specifications

Table 1-1 lists the functional specifications for the DWZZH Hub.

Table 1–1 UltraSCSI 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,
	when the fair arbitration option is enabled.
Overload Protection	TERMPOWER is not supplied by the UltraSCSI Hub.
DTERMPOWER	Internal TERMPOWER is protected via a resetable fuse.
STERMPOWER	TERMPOWER must be supplied from the remote
	connection to enable
	each Hub port.
Shielding, Enclosure &	Shielded for ESD, EMI, and safety requirements.
Connectors
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	25 meters (82 feet) per segment. Refer to Chapter 2,
Length	Section 2.2 Configuration Note for more information
Ultra (20 megatransfers	regarding cabling distances.
per second or 40 MB/s)
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

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