Datasheet

1U Server Chassis SR1300 Hot-Swap SCSI Backplane
Revision 1.2
Intel order number A94544-004
37
6.3.16 SCA2 Hot-Swap SCSI Drive Connectors
The SCSI backplane provides three hot-swap SCA2 connectors (Foxconn*: LS24403-J34) ,
which provide power and SCSI signals using a single connector. Each SCA drive attaches to
the backplane using one of these connectors.
Figure 21. 80-pin SCA2 SCSI Interface
Table 24. 80-pin SCA2 SCSI Interface Pinout
Pin Signal Name Signal Name Pin
1 12V PreCharge 12V Ground 41
2 12V 12V Ground 42
3 12V 12V Ground 43
4 12V Mated 1 44
5 3.3V 3.3V PreCharge 45
6 3.3V DIFFSNS 46
7 -DB (11) +DB (11) 47
8 -DB (10) +DB (10) 48
9 -DB (9) +DB (9) 49
10 -DB (8) +DB (8) 50
11 -I/O +I/O 51
12 -REQ +REQ 52
13 -C/D +C/D 53
14 -SEL +SEL 54
15 -MSG +MSG 55
16 -RST +RST 56
17 -ACK +ACK 57
18 -BSY +BSY 58
19 -ATN +ATN 59
20 -DB (P) +DB (P) 60
21 -DB (7) +DB (7) 61
22 -DB (6) +DB (6) 62
23 -DB (5) +DB (5) 63
24 -DB (4) +DB (4) 64
25 -DB (3) +DB (3) 65
26 -DB (2) +DB (2) 66
27 -DB (1) +DB (1) 67
28 -DB (0) +DB (0) 68