Physical Requirements; Single-Ended Maximum Distance Between Terminators - Fujitsu MAN3184 SERIES Specifications

(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).
Table1.2

Single-Ended maximum distance between terminators

Number of
attached devices
FAST-5
2 to 4 devices
5 to 8 devices
9 to 16 devices
C141-E123-01EN
Maximum distance between
terminators (meters)
FAST-10 FAST-20
6 3
6 3
6 3
3
1.5
N/A
1 - 7