AI Infrastructure Power // Shelf Monitoring PRELIMINARY: specifications subject to change
PMC: Ethernet and Redfish monitoring for every XPC DC shelf
The Power Monitoring Controller is the hot-pluggable controller in every XPC DC power and battery
shelf. It collects telemetry, alarms and inventory from up to six modules and presents them to the rack management
network over DMTF Redfish, with a built-in web interface and security built into the hardware.
Redfish
DMTF, over HTTPS
1 GbE
RJ45 to top-of-rack
6
Modules per shelf
PoE
Or shelf powered
Hot-plug
No shelf interruption
Root of trust
Signed firmware
PMC, one per shelf. Front panel latch, gigabit RJ45 management port, status LED and reset button.
Architecture
How the PMC connects
Each shelf connects to the management network through its own PMC, over a gigabit Ethernet port to the
top-of-rack switch. Inside the shelf, the PMC reads every module over PMBus. Power conversion, battery operation and
protection stay inside each module, so the shelf keeps running if the PMC is removed or replaced.
Key Features
What the PMC gives you
Standards
DMTF Redfish
Standard Redfish resources for shelves, power supplies and sensors, plus a built-in web interface.
Telemetry
Per-module readings
Input and output voltage, current and power, fan speeds and temperatures for every module.
Alarms
Thresholds and events
Settable thresholds on every sensor, with Redfish event subscriptions and metric reports.
Diagnostics
Waveform capture
On-demand capture of six internal signals, including bulk capacitor voltage and AC input current.
Security
Hardware root of trust
Signed firmware with anti-rollback and automatic recovery; role-based access with a full audit log.
Service
Updates without downtime
PMC and module firmware updated through Redfish, one module at a time, without interrupting shelf power.
−5 to +45°C inlet; operates within the host shelf’s limits
Humidity
10 to 90%, non-condensing
Altitude
3050 m (10,000 ft)
Compliance
Qualified as part of the host shelf; RoHS, REACH
Front Panel
Front panel
Green latch for insertion and extraction. Gigabit RJ45 management port with PoE input and link and activity indicators. Status LED: blue for power, amber for an active fault. Recessed reset button: hold to clear a fault, hold longer to restart the network connection.
