Cut Sheet

WWW.LEGRAND.US/WATTSTOPPER
WATTSTOPPER
®
SENSORS
Description
Wattstopper’s CI-355 passive infrared (PIR) occupancy sensor
automatically turns lighting on and off based on occupancy. The
sensor mounts on the ceiling with a flat, low-profile appearance
and provides 360 degrees of coverage.
Operation
The CI-355 is line voltage and operates on a single phase at
120, 230, 277 or 347 VAC. The sensor uses passive infrared
technology (PIR) to sense occupancy and automatically turn
lighting on. PIR works by sensing the difference between
infrared energy from a human body in motion and the
background space. When no occupancy is detected for the
length of the time delay, lighting automatically turns off.
Time Delay Options
The CI-355 is factory set for a 20 minute time delay, ideal for
both energy savings and user satisfaction in most applications.
Installers can quickly select other fixed time delays (5, 10, 15
or 30 minutes) via DIP switches. Fixed time delays eliminate
the occupant dissatisfaction associated with an automatically
adjusted time delay option, and reduce callbacks. Walk-through
mode may be enabled for added energy savings in spaces with
frequent transient traffic.
Applications
The CI-355 works well in open office spaces, computer rooms,
conference rooms, classrooms, and warehouses. It is a good
choice for areas with high ceilings or with two-level lighting.
The convenient mounting system keeps installation costs
down. It also eliminates the need for a power pack by using line
voltage wiring.
PASSIVE INFRARED LINE VOLTAGE CEILING SENSOR
CI-355
Architecturally appealing
low profile appearance
Terminal wiring for quick and
easy installation
Walk-through mode increases
savings potential
360° coverage
Operates at 120, 230 (single
phase), 277 or 347 VAC, 50/60 Hz
OCCUPANCY & VACANCY
• Advanced control logic based on RISC micro-controller
provides:
– Detection Signature Processing eliminates false triggers
and provides immunity to RFI and EMI
– Walk-through mode turns lights off 3 minutes after the
area is initially occupied – ideal for brief visits such as mail
delivery
– Built-in light level sensor featuring simple, one-step set-up
• Zero-crossing for long relay life
• LED indicates occupancy detection
• DIP switch simplifies sensor adjustments
• Clip mounting system makes ceiling tile
installation simple
• Uses existing line voltage wiring and doesn’t require a
power pack
• Sensor coverage tested to NEMA Guide Publication WD 7-2000
Features