SC743 Chassis Manual
D-6
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 deni-
tions.
Sideband Headers
Pin # Denition Pin # Denition
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 Denitions
Pin # Denition Pin # Denition
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 connector, designated JP22, pro-
vides power to the mobile rack fan. See the
table on the right for pin denitions.
Fan Connectors
Pin# Denition
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 certied
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 ve ports are designated
#0 - #4.
