3-3
Safety Information and Technical Specifi cations
9. Activity LED Header
The activity LED header, designated JP26,
is used to indicate the activity status of
each SAS drive. For the activity LED
header to work properly, connect a 10-pin
LED cable.
6. and 7. Sideband Headers
The sideband headers are designated JP51
and JP52. For SES-2 to work properly, an
8-pin sideband cable must be connected.
See the table to the right for pin defi ni-
tions.
Sideband Headers
Pin # Defi nition
Pin # Defi nition
2
Mobile rack
Addressing
(SB5)
1
Controller
ID (SB6)
4
Reset (SB4)
3
GND (SB2)
6
GND (SB3)
5
SDA (SB1)
8
Mobile rack
ID (SB7)
7
SCL (SB0)
10
No Connec-
tion
9
No Connec-
tion
SAS Activity LED Header
Pin Defi nitions
Pin # Defi nition
Pin # Defi nition
1
ACT IN#0
6
ACT IN#4
2
ACT IN#1
7
ACT IN#5
3
ACT IN#2
8
ACT IN#6
4
ACT IN#3
9
ACT IN#7
5
Ground
10
Empty
10. Fan Connector
The 3-pin connectors, designated JP22,
provides power to the mobile rack fan. See
the table on the right for pin defi nitions.
Fan Connectors
Pin# Defi nition
1
Ground
2
+12V
3
Tachometer
8. Upgrade Connector
The upgrade connector, designated JP46,
is used for diagnostic purposes only. This
connector should only be used by a certifi ed
and experienced technician.
11 - 15. SAS/SATA Ports
The SAS/SATA ports are used to connect
the SAS/SATA cables from the ports to the
hard drives. The fi ve ports are designated
#0 - #4.
