Cytron SN-E18-B03N1 User Manual - Page 5

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3. PRODUCT SPECIFICATION AND LIMITATIONS

3.1 Theory of Operation

The SN-E18-B03N1 contains infrared sensor for use as reflection of IR signal barriers. It

uses special sensor to detect the modulated IR signal reflected back from a nearby either or

a far distance of the object. The transmitter and the receiver between the light intensity of the

digital infrared sensor can change into for the purpose of current changes in order to achieve

the detection. The output signal of Digital Infrared Sensor is needed to be pull high as it is

NPN output. The module will output a HIGH if no object is detected and a LOW if an object

is detected.

Note: Although the specification stated it is NPN output, we notice the sensor itself is

being pull-up internally. Causing the output pin is being pull up to power pin. So if 12V is

supply, you will get ~12V at output when no obstacle is detected.

3.2 Pin Definitions and Ratings

Color

Name

Brown

VCC

Blue

Ground

Black

Output

Signal

Absolute Maximum Rating

Parameter

Operating voltage

Sensing meter

Lab test result show even as low as 5V the sensor can still function. Yet, we do no test for

all sensor.

Connects to VCC (+6V to +36V)

Connects to Ground

Connect to an I/O pin of microcontroller which set to INPUT mode

ROBOT . HEAD to TOE

Product User's Manual –SN-E18-B03N1

Function

Min

Max

Unit