Data Sheet for Product

PRODUCT DATA
OSSMD
Dual Relay Decora
®
Wall Switch
Multi-Technology Occupancy Sensors
BASIC OPERATION
The PIR is used to detect motion and turn lights ON,
while either technology is used to keep lights ON
while occupied. This allows the Ultrasonic (U/S) to be
set to higher sensitivity levels minimizing false OFF
conditions. The PIR portion gives immunity to false ON
through a specialized lens that divides the field-of-
view into sensor zones. When a person passes into or
out of a sensor zone, the sensor detects motion and
switches the primary lighting load ON while the sec-
ondary relay operaties in manual-ON/auto-OFF (MD/
GD models). With the FT models, both relays operate
in auto-ON/auto-OFF. The lights will remain ON as long
as there is an occupant moving through
the sensor
zones. The U/S sensors give maximum
sensitivity and
range in difficult spaces with irregular shaped rooms
and partitions that can block the PIR field-of-view. The
OSSMD also features the ability to turn off PIR or U/S
to become a single tech device.
APPLICATIONS
• Private and Executive offices
• Conference rooms • Daylight harvesting
• Classrooms • Restrooms
• Storage areas • Training areas
• Multimedia rooms • Day care centers
• Lounges • Retrofits
• Bi-level or A/B switching
• Multi-location switching (similar to 3-way)
The OSSMD provides automatic lighting control for
two
separate loads from a single unit. It is compatible
with incandescent, fluorescent, low-voltage lighting,
and fan loads. The unit features dual manual-override
switches that can be used to toggle the ON/OFF
status of each lighting load while an area is occupied.
The OSSMD can be
installed in place of two single-pole
wall switches
and fits in a standard single-gang wall
box. To comply with CEC Title 24, the second relay is a
manual-ON only.
The OSSMD-FT is a Leviton exclusive model which also
provides automatic switching of two spearate loads
from a single unit. The unit features a single manual
override switch for the first relay. The second, “fan
relay”, is an auto-ON with relay 1 and has an extended
time delay of 10 minutes after relay 1. This provides
both energy efficiency and optimum ventilation con-
trol from a single device.
OSSMD-MD/-GD
Leviton Mfg. Co., Inc. Lighting & Energy Solutions
201 N. Service Rd. Melville, NY 11747-3138 Tech Line: 1-800-824-3005 Fax: [phone] www.leviton.com/les
© 2011 Leviton Manufacturing Co., Inc. All rights reserved. Subject to change without notice.
OSSMD-FT
HOW THE OSSMD AUTOMATICALLY ADAPTS
CONDITION EXAMPLE ADAPTIVE REACTION
False-On:
Sensor
incorrectly
turns the
lights ON.
False-Off:
Sensor
incorrectly
turns the
lights OFF.
After an initial movement
is sensed, if another
movement is not sensed
within the timer setting the
delayed off-time setting is
automatically reduced.
If motion is detected short-
ly after the lights go off,
the current delayed off-
time setting is increased.
The sensor detects
movement in the
corridor or hallway
and the room light
turns ON.
The sensor does
not detect move-
ment because an
occupant is virtu-
ally motionless and
the lights turn OFF.