Legrand OSR300S 120/277VAC - Manual (Page 2)

UNIT DESCRIPTION AND OPERATION
The OSR300S is a passive infrared wall switch that turns lighting on and off
based on occupancy and ambient light levels. SmartSet™ technology allows the
sensor to be installed without any adjustments and automatically adjusts it to
the usage patterns in the space. Alternate operating modes, selected by DIP
switch settings, can be combined to create the ideal custom control.
The OSR300S contains two relays. Dual buttons on the front of the OSR300S
allow the user to control one or two loads independently. Pressing an ON/OFF
button toggles the state of the corresponding relay, turning the load on if it is
currently off, or off if it is currently on. If no motion is detected during the time
delay that is in effect, the load will turn off.
The OSR300S also contains a light level sensor that, when enabled, operates
on the secondary relay. If adequate daylight is present, the sensor holds the
secondary load off until light levels drop, even when the controlled area is
occupied. Users can override this function by blocking the light coming into the
sensor by placing their hand over the sensor lens until the load comes on. The
load will then remain on until the space is unoccupied.
Turning The Load On
The relays are programmed independently for either Auto On or Manual On.
In either mode, the load can be turned on or off using the ON/OFF button.
Auto On Load turns on and off automatically based on occupancy.
If the load is turned off manually, automatic-on is reenabled
when no motion is detected for five minutes. This prevents the
load from being turned on after it was deliberately turned off.
Manual On Occupants must turn on the load by pressing the ON/OFF but-
ton. The sensor keeps the load on until no motion is detected
for the selected time delay. There is a 30 second reset delay. If
motion is detected during this time, the sensor turns the load
back on automatically. After the reset delay time has elapsed,
the ON/OFF button must be pressed to turn on the load.
Time Delays
The OSR300S holds the load on until no motion is detected for the selected
time delay. You select either SmartSet or a Fixed time delay using DIP switch
settings. The sensor automatically sets the time delay when SmartSet is
enabled; with the fixed time delay settings you select a time delay between
5 to 30 minutes, and whether the Walk-Through mode is included.
Both relays use the same delay, unless a delayed disconnect is enabled for relay
2 using the Delay Relay 2 Disconnect feature. This delayed disconnect feature is
useful in applications where you want both loads to turn off automatically, but
want relay 2 to stay on longer, such as when running an exhaust fan after the
lights have shut off.
Call 800.223.4185 for Technical Support