Method

Action

Result

Push Button4

Press and hold the TEACH button

Output LED: On red

Power LED: On green (good signal) or On

red (no signal)

Remote Input5

No action required; the sensor is ready for the first

limit

2. Position the target for the center of the window. The Power LED must be On green.

3. Teach the limit.

Method

Action

Result

Push Button

Press the TEACH button one time.

Teach Accepted

Output LED: Flashing Red

Teach Not Accepted

Output LED: ON Red

Remote Input

Single-pulse the remote line.

T

4. Teach the limit a second time.

Method

Action

Result

Push Button

Without moving the target, press the TEACH button

one time.

Teach Accepted

Output LED: Yellow or OFF

Teach Not Accepted

Output LED: Flashing Red

Remote Input

Without moving the target, single-pulse the remote

line.

T

Normally Open/Normally Closed Operation Select

The sensor can be configured for either normally open or normally closed operation via the remote teach wire (gray). A series of three

pulses on the line will toggle between normally open and normally closed operation. Normally open is defined as the output energizing when

the target is present. Normally closed is defined as the output energizing when the target is absent. See Figure 2 on page 2 and Figure 3 on

page 3.

To toggle between normally open or normally closed operation, triple-pulse

T

T

T

T

T

the remote line. Either Normally Open or

Normally Closed operation is selected, depending on previous condition.

Lock the Buttons

Enable or disable the buttons to prevent unauthorized adjustment of the program settings.

To lock or unlock the buttons, four-pulse

T

T

T

T

T

T

T

the remote line. The buttons are enabled or disabled, depending on the

previous condition.

Installation

Principles of Operation

Ultrasonic sensors emit one or multiple pulses of ultrasonic energy, which travel through the air at the speed of sound. A portion of this

energy reflects off the target and travels back to the sensor. The sensor measures the total time required for the energy to reach the target

and return to the sensor. The distance to the object is then calculated using the following formula: D = ct ÷ 2

D = distance from the sensor to the target

c = speed of sound in air

t = transit time for the ultrasonic pulse

To improve accuracy, an ultrasonic sensor may average the results of several pulses before outputting a new value.

Temperature Effects

The speed of sound is dependent upon the composition, pressure and temperature of the gas in which it is traveling. For most ultrasonic

applications, the composition and pressure of the gas are relatively fixed, while the temperature may fluctuate.

In air, the speed of sound varies with temperature according to the following approximation:

In metric units:

In English units:

C

4 0.04 s < “click” < 0.8 s

5 0.04 s < T < 0.8 s

4

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