2-2
BPN-SAS3-743A Backplane
User's Guide
#5. - #7. Backplane Main Power Connectors
The 4-pin connectors, designated JPW1,
JPW2, and JPW3, provide power to the
backplane. See the table on the right for
pin definitions.
2-2 Front Connector Pin Definitions
#2.
JTAG Connector
The JTAG connector, designated J16, is
used for diagnostic purposes. This connec-
tor should not be used as it is for internal
testing only.
Backplane
Main Power
4-Pin Connector
Pin# Definition
1
+12V
2 and 3
Ground
4
+5V
#3. - 4. SAS3 Ports
The SAS3 ports are used to connect the
SAS3 drive cables. The 2 ports are desig-
nated JSM0, for drives at SAS #0-#3, and
JSM1, for drives at SAS #4-#7 (see section
2-4 for SAS drive locations). Each port is
also compatible with SATA drives. However,
mixing SAS3 and SATA drives in the same
enclosure is not recommended.
#1. CPLD Chip
The CPLD is an enclosure management
chip that supports the SGPIO and LED
management.
