30
Supermicro SCLA26 Chassis User's Manual
Backplane
Main Power
4-Pin Connector
Pin# Definition
1
+12V
2 and 3
Ground
4
+5V
1. 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.
2-3. SAS Connectors
SAS connectors are used to connect the SAS drive
cables and are designated J14 and J15. Each of the two
connectors has two ports for a total of four ports. These
four ports are designated as follows, Connector J14 has
ports SASP1 and SASP2. Connector J15 has ports SASP3
and SASP4. These connectors are also compatible with
SATA drives.
4.-5. NVMe Connectors
Two NVMe connectors are used to connect the NVMe drive
cables. Each connector controls two NVMe SSDs for a
total of four SSDs. Connector J16 is for SSDs NVMe2 and
NVMe3. Connector J17 is for SSDs NVMe1 and NVMe4.
6. SDB Connector
The serial debug or SDB connector is designated J18 and
is used for the manufacturer's diagnostic purposes.
8.-9. I
2
C Connectors
The I
2
C connectors are designated J20 I2C#0, and J21
I2C#4.
10. CPLD Upgrade Connector
The CPLD upgrade connector is designated JP2 CPLD.
A.5 Rear Connector and Pin Definitions
