Philips EasySense Design Manual page 21

Does EasySense make sense
if I only want to do occupancy sensing?
How does the daylight harvesting feature work?
Is EasySense "failsafe"?
May 2016
Yes. Most occupancy sensors run on high voltage or
require an extra power pack, adding cost and
complexity. Typical wallplate-style occupancy
sensors — while mass produced and inexpensive —
vary in performance by use case since the viewing
angle from a wall is less than ideal. Also, the relay-
free operation of EasySense makes it inherently
more reliable. And traditional occupancy sensors are
bulky compared to the compact size of EasySense.
EasySense does auto-calibration when the luminaire
is first powered. See the system startup behavior/
auto calibration section for details. Electric lighting
will not reduce below the programmed background
light level regardless of daylight availability.
Traditional sensors lacking auto-calibration are
either pre-set with an assumed task light level or
require manual calibration during commissioning.
Unlike traditional occupancy sensors, EasySense
does not have a mechanical relay. This is a benefit
of SR drivers, as on/off is done relay-free within the
driver. Devices with mechanical relays should be
designed so that relay failure results in "lights on."
If an SR driver does not see a digital signal from a
device for a long period of time (e.g., loose
connection, sensor failure), the driver goes to full
programmed output.
Design-in Guide - Philips EasySense luminaire-mount sensors 21