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ITGlossary · Communication and monitoring
Network Management Card (NMC)
An interface card enabling remote monitoring and control of UPS systems via network.
Technical level:Intermediate
The card fits into a slot on the UPS and gives it its own IP address on the local network. Through a web browser or SNMP you can view voltages, load, temperature and battery status, receive email alerts, and run a battery test or restart outlets remotely.
Its most important function is controlled shutdown: during a prolonged outage, the card notifies servers, virtual machines and NAS devices so that they shut down cleanly before the battery runs out. A UPS with a USB port can usually shut down only one computer; a network card can serve many.
Change the default password during installation, keep the firmware up to date, and connect the card to a management network rather than exposing it directly to the internet.
Related terms
- Remote MonitoringThe ability to observe and manage UPS performance over a network from another location.
- SNMPA standard network protocol used to monitor and control devices like UPS systems over a network.
- Ethernet Port (RJ45)The UPS's Ethernet network port, through which it can be monitored and controlled from any computer on the network via a browser, SNMP or shutdown software.
- OCPP (Open Charge Point Protocol)An open communication protocol between a charging station and central management software, used for remote control, billing and monitoring.
- Wake-on-LAN (WoL)Network card feature that starts a powered-off computer or server when it receives a special network packet, the magic packet.
- Alarm ContactA relay output on a UPS that changes state on an alarm, such as battery mode, low battery or a fault, to alert an external system.