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2.6 CABLE CONNECTIONS
This section describes the different connectors for the interface signal cables (cables A
and B), for the system ground cable, and for the power cable.
2.6.1 Interface Cables
Interface cables A and B are connected to the G9QST PCB as shown in Figure 2-13.
~
PIN 1 MARK
02246
~
POWER CABLE------.
B CABLE
-
I
-k~_®u
G9QST PCB
P1:
]
A CABLE
{
:1
r---
j
.
:~----~
L---.l:~===:E=t:~~~
Figure 2-13 Interface Cable Connections
Cable B should not exceed 49.2 ft (15 m) in length. Cable A should not exceed 98.4 ft (30 m)
in length. In a daisy-chain system, the total length of cable A (from the controller to the
last drive) should not exceed 98.4 ft (see Figure· 2-14).
DISK DRIVE CONTROLLER
SG
AO
BO
B1
Bn
r
CABLEA
CABLE B
-
-
/
\
/
\
/
I
-
~
V
-
~
~~
A
fa-
A
r
B -
A
rs-
*TERM
*TERM
*TERM
DISK DRIVE
DISK DRIVE
- - -
DISK DRIVE
0
1
4 (maximum)
'-
98.4' MAXIMUM
j
* TERMINATING RESISTORS INSTALLED ON EACH DRIVE
Figure 2-14 Cable AlDaisy-Chain System
2-17
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