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38 ST43401N/ND, ST43402ND User’s Manual, Rev. B
To enable the feature, it is necessary to run an additional daisy-chain cable
from drive to drive and to make a master/slave selection for each drive.
Connector J7 is used by ST43401N/ND drives. Connector J5 on the control
board handles the cable connections on ST43402ND drives. Master/slave
selection is made by a jumper on connector J4A. Figure 20 shows the two
connectors for ST43401N/ND drives, and Figure 21 shows the two connec-
tors for ST43402ND drives.
For a drive at the end of the daisy chain, the cable connects to one of the two
rows of pins (row A or row B), and a terminator connects to the other row of
pins. Both ends of the cable must be terminated.
B
J7
J4A
A
Cable from
Preceding Unit
Cable to
Next Unit
Control
Board
Select Plug
(removed = master)
Slave Select
Pin 1
Figure 20. Making ST43401N/ND spindle sync connections