Overview

The Q60LAF sensor is a full-featured adjustable-field sensor. These adjustable-field sensors are able to detect objects of relatively low

reflectivity, while ignoring other objects in the background (beyond the cutoff point). The cutoff distance is mechanically adjustable,

using the 2-turn adjustment screw on the top of the sensor. A rotating pointer indicates the relative cutoff position. The indicator moves

clockwise to show increasing distance.

The collimated laser emitter produces a small, bright spot, allowing easy alignment and precision sensing of relatively small objects at

long range.

Two push buttons (ON Delay and OFF Delay) are used to set the output delay options, to toggle between light and dark operate modes

and to lock out the push buttons for security purposes. These functions also may be accomplished using the remote wire (available on

some models).

Seven LED indicators show, during RUN mode, the sensor configuration and operating status. During Delay Configuration, 5 of the LEDs

combine to form a single light bar that indicates relative ON or OFF delay time.

Note: When an object approaches from the side, the most reliable sensing usually occurs when the line of approach

is parallel to the sensing axis.

Note: Sensing at closer than the minimum specified range is not guaranteed.

Features and Indicators

Note: Outputs are active during on/off timing selection mode.

ON Delay

Steady Green: Run mode, ON delay is active

Flashing Green: ON Delay Selection mode is active

OFF Delay

Steady Green: Run mode, OFF delay is active

Flashing Green: OFF Delay Selection mode is active

5-Segment Light Bar

Indicates relative delay time during ON or OFF Delay

Selection modes

Output Indicator

Steady Amber: Outputs are conducting

Steady Green: During ON/OFF Delay Selection modes

Dark Operate Indicator

Steady Green: Dark Operate is selected

Lockout Indicator

Steady Green: Buttons are locked out

Light Operate Indicator

Steady Green: Light Operate is selected

Signal Indicator

Steady Green: Sensor is receiving signal

Flashing Green: Marginal signal (1.0 to 2.25 excess

gain)

ON/OFF Delay Push

Buttons and Indicators

Cutoff Adjustment Screw

Light Sensed Indicator

Light Operate Selected

Push Button

Lockout Indicator

Dark Operate Selected

Output Conducting

(Bi-color Amber/Green)

The indicators, above right, also function as a 5-

segment light gar during delay selection modes

Adjustable-Field Sensing—Theory of Operation

The Q60LAF 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 on page 3). 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, object beyond the cutoff distance), the sensor ignores the object.

The cutoff distance for these sensors is adjustable. Objects lying beyond the cutoff distance 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 on page 4).

Q60LAF Series Laser Adjustable-Field Sensors

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