Datasheet

Intel® Server Board S2600CW Platform Management Intel® Server Board S2600CW Family TPS
84 Revision1.11
This capability is offered to provide system administrators the option to manually configure
fans speeds in instances where the fan speed optimized for a given platform may not be
sufficient when a high end add-in is configured into the system. This enables easier usage of
the fan speed control to support Intel as well as third-party chassis and better support of
ambient temperatures higher than 35°C.
5.3.15 Power Management Bus (PMBus*)
The Power Management Bus (PMBus*) is an open standard protocol that is built upon the
SMBus* 2.0 transport. It defines a means of communicating with power conversion and other
devices using SMBus*-based commands. A system must have PMBus*-compliant power
supplies installed in order for the BMC or ME to monitor them for status and/or power
metering purposes.
For more information on PMBus*, see the System Management Interface Forum Website
http://www.powersig.org/.
5.3.16 Power Supply Dynamic Redundancy Sensor
The BMC supports redundant power subsystems and implements a Power Unit Redundancy
sensor per platform. A Power Unit Redundancy sensor is of sensor type Power Unit (09h) and
reading type Availability Status (0Bh). This sensor generates events when a power subsystem
transitions between redundant and non-redundant states, as determined by the number and
health of the power subsystem’s component power supplies. The BMC implements Dynamic
Power Supply Redundancy status based upon current system load requirements as well as
total Power Supply capacity. This status is independent of the Cold Redundancy status. This
prevents the BMC from reporting Fully Redundant Power supplies when the load required by
the system exceeds half the power capability of all power supplies installed and operational.
Dynamic Redundancy detects this condition and generates the appropriate SEL event to notify
the user of the condition. Power supplies of different power ratings may be swapped in and
out to adjust the power capacity and the BMC will adjust the Redundancy status accordingly.
The definition of redundancy is power subsystem dependent and sometimes even
configuration dependent. See the appropriate Platform Specific Information for power unit
redundancy support.
This sensor is configured as manual-rearm sensor in order to avoid the possibility of
extraneous SEL events that could occur under certain system configuration and workload
conditions. The sensor shall rearm for the following conditions:
 PSU hot-add
 System reset
 AC power cycle
 DC power cycle
System AC power is applied but on standby – Power unit redundancy is based on OEM SDR
power unit record and number of PSU present.