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Technical Reference
AC Power Input
An IEC320 C13 10A receptacle is located on each power supply. An appropriately-sized power
cord and AC main power source are required. An external AC cord retention feature is supported
by the chassis but is not supplied with the platform.
External Ultra320* SCSI Connector (Optional)
The Server Platform supports an optional shielded external SCSI connection on the back panel.
This port is controlled by SCSI port 1 of the dual-channel LSI 53C1030 SCSI controller located on
the I/O baseboard. To implement this feature, the optional External SCSI Cable must be installed.
Table 20.
External SCSI Connector Pinout
Pin
Signal
1
+DB(12)
2
+DB(13)
3
+DB(14)
4
+DB(15)
5
+DB(P1)
6
+DB(0)
242
NEUTRAL
GND
IEC 320 C19
Figure 134. AC Power Input Connector
Figure 135. External SCSI Connector
Pin
Signal
18
TERMPWR
19
NC
20
GND
21
+ATN
22
GND
23
+BSY
Intel® Server Platforms SR4850HW4 & SR4850HW4/M Product Guide
LINE
Pin
Signal
35
-DB(12)
52
36
-DB(13)
53
37
-DB(14)
54
38
-DB(15)
55
39
-DB(P1)
56
40
-DB(0)
57
Pin
Signal
TERMPWR
NC
GND
-ATN
GND
-BSY
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