ETC Echo Light Sensor - Manual (Page 12)

E T C I n s t a l l a t i o n G u i d e
Echo™ Light Sensor
Echo Light Sensor Installation Guide Page 12 of 12
Switched Photo Sensor Operation
When dip switch 1 is set to Switched operation, the sensor by default performs
threshold based activation of both a “Dark” and a “Bright” condition, which are
determined by the lux threshold settings. Lighting actions occur after
measurements have been maintained for the configured delay time.
• By default, the “Dark” action activates Preset 1 in the device’s space, and
the “Bright” action executes the space “Off” command.
• When used in a space with manual wall station controls, the “Dark” action
cannot be allowed anytime the space is in the “Off” state. Also when used in
the same space with Occupancy/Vacancy sensors, the “Dark” action is only
allowed when there is occupancy.
• Even in Automatic-On operation (no Inspire or preset station manual
controls were detected), the sensor is prohibited from turning on lights after
the space off command has been given by another device. However, if the
sensor itself issues the “Off” command (due to bright conditions), it will turn
on lighting if conditions become too dark.