A33606-PCI-01 SAS-2 Expander User Manual
20
Copyright © 2010 by Astek Corporation. All rights reserved
Ver. B
The temperature sensors are monitored through SCSI Enclosure Services (SES). Additional information on
SES is located in the SCSI Enclosure Services (SES) Section.
Fan Headers
There are 4 connectors for fan attachment on the A33606-PCI. One of the connectors (J33) is reserved for
the heatsink fan that cools the expander. The remaining 3 connectors (J14, J15, J20) support 3-pin fans
with tachometer or 4-pin fans with tachometer and PWM control.
The fan speed is monitored by the expander and reported through SES. The fan speed is adjusted by the
expander through SES control commands. The expander does not automatically adjust the fan speed.
Connectors J14 and J15 also have fan detect circuitry to determine if a fan is attached to the connectors.
This information is reported through SCSI Enclosure Services. J20 and J33 do not have this capability.
The table below shows the pinout of the fan connectors.
J33: Heatsink Fan Connector
Pin
Signal Name
1
Ground
2
+12VDC
3
Tachometer
J14, J15, J20: External Fan Connector
Pin
Signal Name
1
Ground
2
+12VDC
3
Tachometer
4
PWM / Speed Control
The fans can be monitored and controlled through SCSI Enclosure Services (SES). Additional information
on SES is located in the SCSI Enclosure Services (SES) Section.
Summary of Contents for A33606-PCI-01
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