S30AW3LP datasheet, PDF - EEWORLD Datasheet

S30AW3LP: DescriptionSensors - ac-Voltage; File Size808KB，7 Pages; ManufacturerETC2

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S30AW3LP Overview

Sensors - ac-Voltage

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S30 Sensors – ac-Voltage Series

Self-contained ac-operated sensors

Features

• Featuring EZ-BEAM

technology, the specially designed optics and electronics

provide reliable sensing without the need for adjustments

• 30 mm plastic threaded barrel sensor in opposed, retroreflective or fixed-field

modes

• Completely epoxy-encapsulated to provide superior durability, even in harsh

sensing environments rated to IP69K

• Innovative dual-indicator system takes the guesswork out of sensor performance

monitoring

• 20 to 250V ac (3-wire hookup); SPST solid-state switch output, maximum

load 300 mA

Models

Sensing Mode

Range

LED

Infrared

950 nm

Output

–

Model*

S303E

S30AW3R

S30RW3R

S30AW3LP

S30RW3LP

S30AW3FF200

S30RW3FF200

S30AW3FF400

S30RW3FF400

S30AW3FF600

S30RW3FF600

Opposed

60 m (200')

Polarized

Retroreflective

6 m (20')

Visible Red

680 nm

200 mm (8") cutoff

Fixed-Field

400 mm (16") cutoff

Infrared

880 nm

600 mm (24") cutoff

* Standard 2 m (6.5') cable models are listed.

•

9 m (30') cable:

add suffix

“W/30”

(e.g.,

S303E W/30).

•

4-pin Micro-style QD models:

add suffix

“Q1”

(e.g.,

S303EQ1).

A model with a QD connector requires a mating cable.

Never use these products as sensing devices for personnel protection. Doing so could lead to serious injury or death.

These sensors do NOT include the self-checking redundant circuitry necessary to allow their use in personnel safety

applications. A sensor failure or malfunction can cause either an energized or de-energized sensor output condition.

Consult your current Banner Safety Products catalog for safety products which meet OSHA, ANSI and IEC standards for

personnel protection.

WARNING . . .

Not To Be Used for Personnel Protection

Printed in USA

01/05

P/N 121519

S30 Sensors – ac-Voltage Series

Fixed-Field Mode Overview

S30 Series self-contained fixed-field sensors are small, powerful, infrared diffuse mode

sensors with far-limit cutoff (a type of background suppression). Their high excess gain

and fixed-field technology allow them to detect objects of low reflectivity, while ignoring

background surfaces.

The cutoff distance is fixed. Backgrounds and background objects must

always

be placed

beyond the cutoff distance.

Fixed-Field Sensing – Theory of Operation

The S30FF compares the reflections of its emitted light beam (E) from an object back to the

sensor’s two differently aimed detectors, R1 and R2 (see Figure 1). If the near detector (R1)

light signal is stronger than the far detector (R2) light signal (see object A, closer than the

cutoff distance), the sensor responds to the object. If the far detector (R2) light signal is

stronger than the near detector (R1) light signal (see object B, beyond the cutoff distance),

the sensor ignores the object.

The cutoff distance for model S30FF sensors is fixed at 200, 400 or 600 millimeters (8",

16", or 24"). Objects lying beyond the cutoff distance usually are ignored, even if they are

highly reflective. However, it is possible to falsely detect a background object, under certain

conditions (see Background Reflectivity and Placement).

In the drawings and discussion on these pages, the letters E, R1, and R2 identify how the

sensor’s three optical elements (Emitter “E”, Near Detector “R1”, and Far Detector “R2”)

line up across the face of the sensor. The location of these elements defines the sensing

axis (see Figure 2). The sensing axis becomes important in certain situations, such as those

illustrated in Figures 5 and 6.

Receiver

Elements

Near R1

Detector

Far

Detector

Lenses

Object

Cutoff

Distance

Object B

Background

Emitter

Sensing

Range

Object is sensed if amount of light at R1

is greater than the amount of light at R2

Figure 1. Fixed-field concept

Sensor Setup

Sensing Reliability

For highest sensitivity, position the target object for sensing at or near the point of

maximum excess gain. The excess gain curves for these products are shown on page 5.

Maximum excess gain for all models occurs at a lens-to-object distance of about 40 mm

(1.5"). Sensing at or near this distance will make maximum use of each sensor’s available

sensing power. The background must be placed beyond the cutoff distance. (Note that the

reflectivity of the background surface also may affect the cutoff distance.) Following these

two guidelines will improve sensing reliability.

Background Reflectivity and Placement

Avoid mirror-like backgrounds that produce specular reflections.

False sensor response will

occur if a background surface reflects the sensor’s light more strongly to the near detector,

or “sensing” detector (R1), than to the far detector, or “cutoff” detector (R2). The result

is a false ON condition (Figure 3). To cure this problem, use a diffusely reflective (matte)

background, or angle either the sensor or the background (in any plane) so the background

does not reflect light back to the sensor (see Figure 4). Position the background as far

beyond the cutoff distance as possible.

An object beyond the cutoff distance, either stationary (and when positioned as shown in

Figure 5), or moving past the face of the sensor in a direction perpendicular to the sensing

axis, can cause unwanted triggering of the sensor if more light is reflected to the near

detector than to the far detector. The problem is easily remedied by rotating the sensor

90° (Figure 6). The object then reflects the R1 and R2 fields equally, resulting in no false

triggering. A better solution, if possible, may be to reposition the object or the sensor.

Sensing

Axis

As a general rule, the most reliable

sensing of an object approaching from

the side occurs when the line of approach

is parallel to the sensing axis.

Figure 2. Fixed-field sensing axis

P/N 121519

Banner Engineering Corp.

•

Minneapolis, MN U.S.A.

www.bannerengineering.com • Tel: 763.544.3164

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