2-2
BPN-SAS3-119A-N12 Backplane
User's Guide
2-2 Front Connector Pin Definitions
#2. Backplane to Front Panel Header
This connector is designated JF2. It con-
nects the backplane to the front LED panels
on the chassis.
#4. Mini-SAS HD Connectors
Connect a SAS/SATA drive cable to these
ports when configuring the SAS/SATA
drives. The ports are designated JSM1,
for drives at SAS#0-3, JSM2, for drives at
SAS#4-7, and JSM3, for drives at SAS#8-
11 (see section 2-4 for drive locations). The
ports are also compatible with SATA drives.
However, mixing SAS and SATA drives in
the same enclosure is not recommended.
4-Pin Power
Connectors (JPW1,
JPW2, and JPW3)
Pin# Definition
1, 2
Ground
3
+5V
4
+12V
#1. Backplane Main Power Connectors
These 4-pin connectors, designated JPW1,
JPW2, and JPW3, provide power to the
backplane. See the table on the right for
pin definitions.
#3. I
2
C Connector
This connector, designated J25, is used to
monitor HDD activity and status. It is only
required when specified by a system manual.
See the table on the right for pin definitions.
I
2
C Connector
Pin Definitions (J25)
Pin# Definition
1
Data
2
Ground
3
Clock
4
No Connection