Backup Control Options
Ensure reliable network
Successful integration of Ketra devices in a HomeWorks QS system relies on the local network for all of the devices to function properly. Therefore, it is essential to have the HomeWorks QS processors, Lutron Connect bridges, and Ketra N4 hubs all connected together in a robust way.
Networking Rule 1 - Avoid daisy-chaining through other devices and switches. Instead, connect all devices directly to the same switch (home run). This will allow the lighting devices to communicate even if other components have issues.
Networking Rule 2 - Use a reliable switch that can function independently from the router or other network equipment. If using DHCP and the DHCP server goes down, the Lutron and Ketra devices will maintain their DHCP addresses and still be able to communicate. Alternatively, static IP addresses can be used.
Note: Internet access is not required for run-time system functionality but is required for LAN connectivity. If the internet connection is lost, the system will not be affected. Internet access is still desirable for periodic updates.
Networking Rule 3 - HomeWorks QS processors are the only devices that should be daisy-chained via the built in Ethernet ports. Do not connect N4 hubs or Lutron Connect bridges to the Ethernet ports.
Networking Rule 4 - Connect each N4 hub to a port on the network switch rather than daisy-chaining the N4 hubs.
Networking Considerations - Consider putting the network switch, HomeWorks QS processor, Lutron Connect bridge, and the N4 hub on a battery backup in case power is lost.
Optional Manual Bypass Control
By default, all Ketra and Lutron lights will turn on to their last level. Lutron recommends keeping this default setting for almost all applications to avoid lights from coming on after a power outage. However, to provide control of Ketra lighting in an unexpected loss of system functionality due to networking or other problems, there are options to allow for backup control. Consider these when designing and wiring the installation or when solving a problem.
Specific Ketra lamps or fixtures can be wired and designated as safety lighting. This is accomplished by setting their poweron behavior to go to a predefined level. This can be specified per device in Ketra Design Studio. By doing this and allowing a means to toggle power to these lights, the occupant will be able to turn them on or off even if the system is completely off or disconnected.
Ensure that there is an accessible, convenient way to toggle power to these lamps and wire them appropriately. Possibilities include:
- Toggle switches in closet or mechanical room
- Lutron PowPak module paired directly (a.k.a. standalone) to a Pico wireless control
- Lutron switching power module (e.g., LQSE-4S8-120-D) with system control and manual override switch
- Lutron Remote Power Module (RPM) with system control and manual override switch
- Breaker
Scenarios
Scenario 1 - The specified Ketra safety lights come on after power outages at an unoccupied vacation home.
Recommendation: Add a timeclock event to be activated along with vacation mode. If these lamps are turned on after a power outage and the home is vacant, the system will turn them off.
Scenario 2 - The specified safety lights come on after power outages in the middle of the night.
Recommendations:
- Do not specify bedroom lights for this feature.
- Select lights as needed for stairways, egress areas, and other common areas.
- Avoid selecting all lights or bright light levels.
Note: These lights will be controllable after the system is restored after the power loss.
Best Practices
- Communicate with the homeowner regarding the behavior of any specified safety lights, specifically the power outage scenarios.
- Once a lamp loses power for more than 2 seconds, even with a generator, the lamp will perform its specified power-on behavior when power is restored.
- Considering using locally controlled Lutron dimmers and switches in addition to Ketra lighting for manual bypass control.
- Clearly label any backup points of control.