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ST3390N, ST3655N Installation Guide, Rev. A
J12. Options jumper block
7
5
3
1
Circuit board
8
6
4
2
Pin Function
1 Ground
2 Parity enable
3 Ground
4 Remote start enable
5 Clock ground
6 External spindle sync.
7 Remote LED –
8 Remote LED +
Figure 2. Front view
J8. User-configuration jumper block
19
17
15
13
11
9
7
5
3
1
Circuit board
20
18
16
14
12
10
8
6
4
2
Pin
Function
1–6
Reserved.
7
Ext. spindle sync.
Clock ground
8
9
Remote LED +
10
Remote LED –
11–20
Reserved. Do not
use.
7
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