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22
Barracuda 4FC Installation Guide, Rev. A
Table 1:
FC-SCA pin descriptions
Pin/contact
Signal name
1*
–EN bypass port A
2*
12 Volts
3*
12 Volts
4*
12 Volts
5*
Reserved NC
6*
Reserved NC
7*
Active LED out
8*
Spindle sync
9*
RMT_start
10*
DLYD_start
11*
–EN bypass port B
12*
SEL_6
13*
SEL_5
14*
SEL_4
15*
SEL_3
16*
Fault LED out
17*
Reserved NC
18*
Reserved NC
19*
5 Volts
20*
5 Volts
21
12 Volts charge
22
Ground
23
Ground
24*
+CH1_in
25*
–CH1_in
Signal type
TTL output
Open collector out
Bi direct [1]
TTL input
TTL input
TTL output
TTL input
TTL input
TTL input
TTL input
Open collector out
TTL input
Diff. PECL input pair
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