The nLight lighting control system is designed to maintain bus power at all times. All lighting control is typically completed by switching power to the load devices, but power to the nLight components stays live. This allows for continuous system operation and immediate responses to system and user control.
This being said, the nLight system is also designed to fully recover from loss of power. Upon initial power up of the system, all devices will discover within the local nLight control zones typically within 30-60 seconds. During this initial discovery, the nLight devices will display an LED blink code of 1 second of rapid flash, followed by two blinks. While in this discovery mode lights will be in the “on” state, but the user will not have system control via the nLight switches.
During and after local discovery is occurring, the system Gateway (head end LAN device and time keeper) will begin discovering all of the system devices. The speed in which this occurs depends on the number of devices and system layout, but it generally occurs at a rate of 2-5 minutes per 100 devices. During this time any global system control or time-based system control will not be active.
Overall, we typically recommend maintaining power to the system at all times, and utilizing the system features and functionality for full control of the lighting loads. If existing contactors or panels exist, this would require wiring these to maintain constant power to nLight system. But if these upstream contactors/panels will remain active (e.g. via daily time schedule control), it is recommend that the entire nLight system be powered down and back up at the same time, including nLight backbones devices (bridges and Gateways). This is the best way to ensure all parts go through the routine discovery. Under this method, there will be system downtime as it goes through discovery as described above.