26

Barracuda 18FC Installation Guide, Rev. A

 

 

 

 

 

Pin/contact

Signal name

Signal type

 

 

 

 

 

 

 

 

 

26

Ground

 

27*

+Port B_in

Diff. PECL input pair

 

 

 

 

28*

–Port B_in

 

29

Ground

 

 

 

 

 

30*

+Port A_out

Diff. PECL output pair

31*

–Port A_out

 

 

 

 

 

32

Ground

 

33*

+Port B_out

Diff. PECL output pair

 

 

 

 

34*

–Port B_out

 

35

Ground

 

 

 

 

 

36

SEL_2

TTL input/output

37

SEL_1

TTL input/output

 

 

 

 

38

SEL_0

TTL input/output

39

Reserved NC

 

 

 

 

 

40

5 Volts charge

 

 

 

 

 

*Short pins in mating backpanel connector.

[1]This pin may be connected to external logic to detect the presence of the drive. The drive connects this pin to the common ground.

Page 28
Image 28
Seagate 18FC manual SEL2