Physical Requirements; Table 1.2 Single-Ended Maximum Distance Between Terminators - Fujitsu MBA3073 SERIES Technical Manual

(7) REQ (REQUEST)
This is a transmission request from the TARG to the INIT in the INFORMATION TRANSFER
phase.
(8) ACK (ACKNOWLEDGE)
The ACK signal is a response to the REQ signal sent from the INIT to TARG in the
INFORMATION TRANSFER phase.
(9) ATN (ATTENTION)
The ATN signal indicates that the INIT has a message to be sent to the TARG. It is used to
generate an ATTENTION condition.
(10) RST (RESET)
The RST signal is a Reset signal to clear all SCSI devices on the bus (to the RESET condition).
1.3

Physical Requirements

All SCSI devices are connected to each other in a daisy chain. Both ends of the interface cable are
terminated with resistor.
Tables 1.2 and 1.3 define the SCSI bus electrical characteristics (for interface signal
driver/receiver).
Table 1.2
attached devices
C141-C015
Single-Ended maximum distance between terminators
Maximum distance between
Number of
FAST-5
2 to 4 devices 6
5 to 8 devices 6
9 to 16 devices 6
terminators (meters)
FAST-10 FAST-20
3 3
3 1.5
3 N/A
19