Spectra Logic 10000 manual +Msg +Sel

Appendix A. Library Specifications

Pin	Signal	Pin	Signal
25	+MSG	59	-MSG
26	+SEL	60	-SEL
27	+C/D	61	-C/D
28	+REQ	62	-REQ
29	+I/O	63	-I/O
30	GND	64	GND
31	+DB(8)	65	-DB(8)
32	+DB(9)	66	-DB(9)
33	+DB(10)	67	-DB(10)
34	+DB(11)	68	-DB(11)

•On the differential SCSI bus, signal information is sent through a wire pair. The voltage difference between the pair of signal wires determines the state of the signal.

•A true DIFFSENS signal (active high) enables the differential drivers. If a single- ended device or terminator is inadvertently connected, this signal is grounded, disabling the differential drivers. Single-ended and differential SCSI devices cannot coexist on the same bus.

•All wire pairs must be terminated. Resistor tolerances in the terminator network are

±5 percent, or less.

•The signal pair is terminated with a 150Ω resistor between the pairs, a 330Ω pull-up resistor to terminator power and a 330Ω pull-down resistor to ground.

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