Seagate 18FC Manual De Usuario
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26
Cheetah 18FC Installation Guide, Rev. A
*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.
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
Pin/contact
Signal name
Signal type