Settings - System - Ups - Vivotek ND9441P User Manual

VIVOTEK - Built with Reliability
10. When the NVR has little reserved power budget, and you attach a new camera, the NVR
will stop supplying power to the new camera.

3-5-15. Settings - System - UPS

On this page, you can configure the system to gracefully shut down when UPS battery is lower
than a certain level. You may also let it shut down when the estimated sustainable time is
reached. We support APC Black 500 UPS.
96 - User's Manual