2.3.2
Hardware Sensors
Sensor Name
Voltage/Signals Monitored
Scanning Enabled under Power State Health LED (Green to Red)
Board 5V
+5 V
Power On
Exceeds critical threshold
Board 12v
+12 V
Power On
Exceeds critical threshold
Board 3.3V
+3.3 V
Power On
Exceeds critical threshold
Board 3.3VSUS
+3.3 VSB
Power On/Off
Exceeds critical threshold
Board BlueLed
Blue LED Voltage
Power On/Off
Exceeds critical threshold
Board 12V DRV
+12 V Hard Drive
Power On
Exceeds critical threshold
ModuleHotSwap
AMC HS State
Power On/Off
No change
IPMBL State
Operational state of IPMB-L
Power On/Off
No change
Health Error
Aggregation of healthy related
sensor
Power On/Off
Asserted/deasserted
Temp AirInlet
Board Inlet Temperature
Power On/Off
Exceeds critical threshold
Temp Exhaust
Board Outlet Temperature
Power On/Off
Exceeds critical threshold
Temp PSU In
Power Switcher In Temperature
Power On/Off
Exceeds critical threshold
Temp PSU Out
Power Switcher Out Temperature
Power On/Off
Exceeds critical threshold
2.3.2.1
IPMB-L Link Sensor
The AM4520 has an IPMB-L links to communicate with the AMC Carrier and other chassis devices on
the chassis IPMB-0 bus. MMC monitors the bus for any link failure and send the bus failure event to
the AMC Carrier upon the recovery occurs.
2.3.2.2
Module Hot Swap
The hot-swap event message conveys the current state of the module, the previous state, and a
cause of the state change as can be determined by the MMC. Refer to AMC.0 R1.0 Specifications for
further details on the module hot-swap state.
2-7
AM4520 User’s Guide
