Legrand CS User Manual

CS Series

360° PIR Occupancy Sensor

Specifications

Voltages . . . . . . . . . . . . . . . . . . . . .20–30VDC (24VDC Typical)

Current Consumption . . . . . . . . . . .@24VDC, 11mA Maximum

Time Adjustment . . . . . . . . . . . . . . . . .15 seconds–30 minutes

Sensitivity Adjustment . . . . . . . . . . . . . . .Minimum/Maximum

Installation Instructions

U.S. Patents:

4,757,204 • 4,787,722

Des360,842

Syracuse, NY 13221

800.223.4185

DESCRIPTION

8 ft

12 ft 12 ft 3 ft 3 ft5 ft 5 ft7 ft 7 ft9 ft 9 ft

0

Typical

desk-top

level

24 ft

44 ft

8 ft

22 ft 13 ft 7 ft 3 ft 0 3 ft 7 ft 13 ft 22 ft

Typical

desk-top

level

The CS Series sensor is a 24VDC Passive Infrared (PIR) occupancy sensor
which controls lighting or HVAC systems based on occupancy in a given area.

PIR sensing systems are passive systems which react to changes in infrared
energy (moving body heat) within the coverage area. PIR sensors must
directly “see” motion of an occupant to detect them, so careful consideration
must be given to sensor placement.

COVERAGE PATTERNS

The CS sensor has a multi-cell, multi-tier Fresnel lens with a field of view
of 360°. The sensor has two lens pattern options. The Extended Range Lens
will cover up to 1200 sq ft and 22 feet from the sensor when mounted at
8 feet. The High Density/Reduced Range Lens will cover up to 500 sq ft and
12 feet from the sensor when mounted at 8 feet.

Coverage shown in the diagrams below is maximum and represents
coverage for half-step, walking motion, with no barriers or obstacles.

DRAWING NOT TO SCALE

High Density/Reduced Range Lens
CS500

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Extended Range Lens (Standard)
CS1200

PLACEMENT

CS Sensor

36'

36'

12'

18'

CS Sensor

The effective coverage distances may be slightly less than the maximum
sensing distance (see Coverage Patterns), depending upon obstacles such as
furniture or partitions, and this must be considered when planning the
number of sensors and their positioning. See the list below for approximate
coverage distances for different types of motion.

Approximate coverage, for a mounting height of 8 feet:
Lens option Walking motion Workstation (hand motion)

High Density up to 12 ft radius (500 sq ft) 9 ft radius (300 sq ft)
Extended Range up to 22 ft radius (1200 sq ft) 12 ft radius (500 sq ft)

The CS sensor can be mounted at various heights. When mounting at
heights other than 8 feet, be aware that as you decrease the mounting
height, you will decrease the range and increase the sensitivity to smaller
motions. Conversely, when you increase the height, you will increase the
range and decrease the sensitivity to smaller motions. At heights of more
than 12-14 feet, you may start to significantly reduce sensitivity.

Often the best location to install
a CS sensor in a closed office is
off-center (see fig.1). Avoid placing
a sensor directly in line with an
open door in which it has a clear
view out, as the sensor may detect
people walking by. For open office
areas with partitions it is best to
place sensors over intersections
of four workstations (see fig. 2).

fig.1

Also avoid placing the sensors close to
air ducts, as rapid air currents or the
differences in temperatures may cause
false activations. For large areas of
coverage use multiple sensors.

fig. 2

Call 800.223.4185 for Technical Support