ST506/412

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The ST506/412 interface requires two cables, one for control and one for data. The control cable is shared between the two drives. But each drive has each own data cable. By twisting some wires on the control cable it won’t be necessary to set the ID for each drive, since the twist will do the job. Wires 25 to 29 should be twisted between drive 1 & drive 2.

     Controller           Drive 2   Twist   Drive 1 
     +--+                   +--+            +--+ 
     |::|===================|  |============|  |  <-Pin 1 
     |::|===================|  |============|  | 
     |::|===================|  |============|  | 
     |::|===================|  |============|  | 
     |::|===================|  |=====\/=====|  | 
     |::|===================|  |=====/\=====|  | 
     |::|===================|  |============|  | 
     +--+                   +--+            +--+ 

Control cable

Image:conn_idc34f.gif 34 PIN IDC FEMALE to the Controller

Image:conn_idc34f.gif 34 PIN IDC FEMALE to the Drive 2

Image:conn_idc34f.gif 34 PIN IDC FEMALE to the Drive 1

Controller Drive 1 Drive 2
Wire 1-24 1-9 1-9 1-9
Wire 25 25 29 25
Wire 26 26 28 26
Wire 27 27 27 27
Wire 28 28 26 28
Wire 29 29 25 29
Wire 30-34 30-34 30-34 30-34

Data cable

20 PIN IDC FEMALE 20 PIN IDC FEMALE to the Controller

20 PIN IDC FEMALE 20 PIN IDC FEMALE to the Drive

Controller Drive
Wire 1-20 1-20 1-20

References

Category:Data Storage Cables

 

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