Dwyer OSC-200 User Manual

Bulletin H-21-OSC

Model OSC-200 Omnidirectional Occupancy Sensor

Specifications - Installation and Operating Instructions

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The Model OSC-200 Omnidirectional Occupancy
Sensor automatically controls a HVAC ventilation system.

A spherical Fresnel lens provides a 360° detection zone
with the use of infrared technology. The integrated dual
delay processor saves energy by eliminating false
activation due to short-term occupancies. The Model
OSC-200 is designed to be ceiling mounted.

INSTALLATION

Do not install where the detector is exposed to direct
sunlight or directly above strong sources of heat.

Do not install in areas that have any obstruction
(plants, large pieces of furniture, curtains, etc.) which
may block the detection.

SPECIFICATIONS
Infrared Sensor: Dual element.
Range: 34.4 ft (10.5 m) Diameter at 13.8 ft (4.2 m) mount

height.

Detectable Speed: 0.33 to 9.8 ft/sec (0.1 to 3.0 m/sec).
Control Output Rating: SPDT, 0.2A at 30 VDC.
Ambient Operating Temperature: -4 to 140°F (-20 to 60°C).
Power Consumption: Standby: 5 mA, Operating: 18 mA.
Mounting Height: 7.9 to 13.8 ft (2.4 to 4.2 m).
Power Requirements: 22 to 26 VAC/DC.
Weight: 2.4 oz (68 g).
Agency Approvals: CE.

DWYER INSTRUMENTS, INC.

Phone: [phone] www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: [phone] e-mail: [e-mail]

MOUNTING

TOP VIEW

SIDE VIEW

360°

TERMINAL
BLOCKS

OFF DELAY

INFRARED SENSOR
(DON’T TOUCH!!)

ON DELAY

CORNER
KNOCKOUT

COVER LOCKING
SCREW

FRESNEL LENS

TAB

KNOCKOUT HOLES
FOR MOUNTING

NC COM NO

FAN COIL CONTROLLER

24 VAC/DC

24V

ON/OFF INPUT

TERMINAL
BLOCKS

OFF DELAY

INFRARED SENSOR
(DON’T TOUCH!!)

COVER LOCKING
SCREW

FRESNEL LENS

KNOCKOUT HOLES
FOR MOUNTING

ON DELAY

CORNER
KNOCKOUT

TAB

The OSC-200 is designed to be recess or surface
mounted to a ceiling.

Step 1: Install Base Unit

• Determine the location of the sensor according to the
detection pattern shown in Figure 1a.

• Remove the cover screw to open the sensor housing
as shown in Figure 1b.

• Remove the circuit board by bending the tab outward
(Figure 1b.)

• Screw the base of the sensor housing to the ceiling
through the knockout holes (Figure 1b.)

Step 2: Wiring

• Feed the cable through one of the corner knockout
holes (Figure 1b.)

• Reinsert the circuit board.

• Turn the screw for each terminal counterclockwise
(Figure 1b.)

• Connect the cable to the corresponding terminals as
shown in Figure 2.

Figure 2

Wiring the Sensor

Figure 1a

Location and Installation of the Sensor

Step 3: Walk Test

Before beginning test, make certain that the On and Off
Delay jumpers (located on the circuit board) are
connected in the “A” positions as shown in Figure 3. If
they are not, follow the procedure under the section titled
On/Off Delay Settings to rearrange the jumpers to location
“A.” Replace the sensor housing and tighten screw.

Figure 1b

Location and Installation of the Sensor

Figure 3

The walk test is used to quickly ensure correct system

A.

STANDBY

DETECTION

B.

RELAY ON

DELAY

C.

1-MINUITE

WAITING

NO

DETECTION

DETECTION

D.

RELAY OFF

DELAY

(RELAY OUTPUT)

wiring, proper functioning of the output, and proper
location of the sensor.

• Apply power to the unit and allow 25 seconds for the
sensor to warm up. The LED will blink (long blink followed
by short) during warm up.

NOTICE

The LED will blink rapidly if the sensor is improperly wired.

• When the LED stops blinking, the sensor has had
adequate time to warm up and is now in standby mode
(Standby mode is discussed in more detail in the
Operation Mode Section.)

• Walk across the detection zone. The LED will stay lit
and the output will be activated during occupancy
detection. Adjust accordingly.

ON/OFF DELAY SETTINGS

To adjust the On/Off Delay time intervals or adjust sensor
for “Walk Test”

OPERATION MODES

The OSC-200 Omnidirectional Occupancy Sensor utilizes
several operation modes to eliminate false readings and
conserve energy.

1. Remove the cover from the sensor.

2. Refer back to Figure 3 to locate the On/Off Delay pins
and jumpers on the circuit board.

3. Gently remove the jumpers and reinsert into the
desired pins according to the table below.

4. Replace cover and screw.

A (Walk Test)

ON

0 Sec.

OFF

10 Sec.

B
10 Sec.
1 Min.

C
30 Sec.
5 Min.

D
1 Min.
10 Min.

E
5 Min.
20 Min.

F
10 Min.
30 Min.

Figure 4

Standby Mode

Before any movement is being sensed, the sensor is in
standby mode.

When the sensor detects occupancy, the LED light turns
on and the sensor switches to Relay On Delay Mode.

Relay On Delay Mode

This adjustable mode allows the user to choose the time
delay before the unit reports that a space is occupied.

The Relay On Delay Mode allows for energy conservation
by bypassing short-term or faulty occupancies. It is
followed by a secondary one minute warning delay.

1-Minute Warning Mode

During this mode, the sensor searches for any movement
for one minute after the Relay On Delay Mode.

If occupancy is detected at any point within that one
minute, the output device is activated and the sensor
enters Relay Off Delay Mode.

If occupancy is not detected in that one-minute time
frame, the sensor enters back into standby mode.

Relay Off Delay Mode

During this mode, the sensor’s output is activated for a
preset period of time.

Once this preset time interval is up, the output device
powers off. However, the relay off delay timer will reset
with each motion detection.

This Relay Off Delay Mode allows for energy conservation
by eliminating unnecessary running of the HVAC system.

NOTICE

Occupancy detection may be affected if the unit is
operated within radio frequency electromagnetic field
strength of approximately 3 volts per meter, but the
performance of the instrument will not be permanently
affected.

STORAGE AND CLEANING

The sensor lens is the most delicate part of the
Occupancy Sensor. The lens should be kept clean at all
times, care should be taken when cleaning the lens using
only a soft cloth or cotton swab with water or medical
alcohol. Allow the lens to fully dry before using the sensor.
The sensor should be installed or stored in an area of
room temperature between -4 and 140ºF (-20 to 60ºC).

MAINTENANCE

After final installation of the unit, no routine maintenance
is required. The Model OSC-200 is not field serviceable
and should be returned if repair is needed (field repair
should not be attempted and may void warranty). Be sure
to include a brief description of the problem plus any
relevant application notes. Contact customer service to
receive a return goods authorization number before
shipping.

©Copyright 2010 Dwyer Instruments, Inc. Printed in U.S.A. 2/10 FR# R6-443398-00

DWYER INSTRUMENTS, INC.

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: [phone] e-mail: [e-mail]

Phone: [phone] www.dwyer-inst.com