Leuze electronic GS 754B Original Operating Instructions

GS 754B

CCD Forked Photoelectric Sensors

EN 04-2017/01 50112717

We reserve the right to

make technical changes

Original operating instructions

© 2017

Leuze electronic GmbH + Co. KG
In der Braike 1
D-73277 Owen / Germany
Phone: [phone]
Fax: [phone]
http://www.leuze.com
[e-mail]

Leuze electronic GS 754B

Table of contents

1 About this document. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.1 Explanation of symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.1 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.2 Foreseeable misuse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.3 Competent persons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.4 Disclaimer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3 Controls and indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4 Device description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4.1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4.2 Optical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4.3 LED indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

5.1 Diameter determination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

5.1.1 ASCII representation via RS 232 (P and M12 interfaces) . . . . . . . . . . . . . . . . . . . . . . . . . 11

5.1.2 Binary representation via RS 232 (P and M12 interfaces) . . . . . . . . . . . . . . . . . . . . . . . . 11

5.2 Edge measurement and height verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

5.3 Width measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

6 Device configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

6.1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

6.2 Terminal program. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

6.2.1 Basic configuration of the terminal program (interface P) . . . . . . . . . . . . . . . . . . . . . . . . 14

6.3 Configuration of the measurement, analysis and output procedures over interface P 15

6.3.1 Configuration table for GS 754B. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

6.4 Special configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

6.4.1 Edge measurement for perforated objects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

6.4.2 Changeover of the edge assignment for single-object measurement . . . . . . . . . . . . . . . 18

6.4.3 PIN 2 as a teach input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6.4.3.1 Teach-in in the middle of the measurement field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6.4.3.2 Teach-in at the end of the measurement field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6.4.3.3 Teach-in at the start of the measurement field. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6.4.4 PIN 2 as a synchronization / trigger input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6.4.5 PIN 2 as an activation input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Leuze electronic GS 754B 1

Table of contents

6.4.6 PIN 2 as a switching output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

6.4.6.1 Standard function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

6.4.6.2 Standard function, inverted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

6.4.6.3 Photoelectric sensor function, dark switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

6.4.6.4 Photoelectric sensor function, light switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

7 Measurement range and resolution . . . . . . . . . . . . . . . . . . . . . . . . 23

7.1 Analog measurement value output (interface M12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

7.2 Digital measurement value output (P and M 12 interfaces) . . . . . . . . . . . . . . . . . . . . . . 24

7.2.1 ASCII format for P and M12 interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

7.2.2 Binary format for the P and M12 interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

8 Error messages (P and M12 interfaces). . . . . . . . . . . . . . . . . . . . . 29

9 Service and support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

10 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

10.1 Optical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

10.2 Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

10.3 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

10.4 Output signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

10.5 Mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

10.6 Environmental data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

11 Order guide and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

11.1 Order guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

11.2 Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

11.2.1 Connection cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

11.2.2 Configuration cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

12 Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

2 GS 754B Leuze electronic

1 About this document

This technical description contains information regarding the proper use of the GS 754B
measuring CCD forked photoelectric sensors.

1.1 Explanation of symbols

The symbols used in this technical description are explained below.

Attention

This symbol precedes text messages which must strictly be observed. Failure to comply with
this information results in injuries to personnel or damage to the equipment.

Notice

This symbol indicates text passages containing important information.

About this document

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Safety

2 Safety

This sensor was developed, manufactured and tested in line with the applicable safety stan­dards. It corresponds to the state of the art.

2.1 Intended use

In connection with a connected control system or evaluation unit, GS 754B CCD forked
photoelectric sensors are used to detect and measure small objects in industrial production
processes.

Areas of application

The GS 754B CCD forked photoelectric sensor is designed especially for the following fields
of application:

• Diameter determination

• Edge measurement and height verification

• Width measurement

CAUTION

Observe intended use!

 Only operate the device in accordance with its intended use.

The protection of personnel and the device cannot be guaranteed if the device is oper­ated in a manner not complying with its intended use.
Leuze electronic GmbH + Co. KG is not liable for damages caused by improper use.

 Read the technical description before commissioning the device.

Knowledge of this technical description is an element of proper use.

NOTICE

Comply with conditions and regulations!

 Observe the locally applicable legal regulations and the rules of the employer's liability

insurance association.

Attention

For UL applications, use is only permitted in class 2 circuits in accordance with the NEC
(National Electric Code).

4 GS 754B Leuze electronic

2.2 Foreseeable misuse

Any use other than that defined under "Intended use" or which goes beyond that use is
considered improper use.

In particular, use of the device is not permitted in the following cases:

• Rooms with explosive atmospheres

• As stand-alone safety component in accordance with the machinery directive

• Operation for medical purposes

NOTICE

Do not modify or otherwise interfere with the device.

 Do not carry out modifications or otherwise interfere with the device.

The device must not be tampered with and must not be changed in any way.
The device must not be opened. There are no user-serviceable parts inside.
Repairs must only be performed by Leuze electronic GmbH + Co. KG.

2.3 Competent persons

Connection, mounting, commissioning and adjustment of the device must only be carried
out by competent persons.

Prerequisites for competent persons:

• They have a suitable technical education.

• They are familiar with the rules and regulations for occupational safety and safety at
work.

• They are familiar with the technical description of the device.

• They have been instructed by the responsible person on the mounting and operation
of the device.

Safety

1)

Certified electricians

Electrical work must be carried out by a certified electrician.

Due to their technical training, knowledge and experience as well as their familiarity with
relevant standards and regulations, certified electricians are able to perform work on elec­trical systems and independently detect possible dangers.

In Germany, certified electricians must fulfill the requirements of accident-prevention regu­lations BGV A3 (e.g. electrician foreman). In other countries, there are respective regula­tions that must be observed.

1) Use as safety-related component within the safety function is possible, if the component combi­nation is designed correspondingly by the machine manufacturer.

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Safety

2.4 Disclaimer

Leuze electronic GmbH + Co. KG is not liable in the following cases:

• The device is not being used properly.

• Reasonably foreseeable misuse is not taken into account.

• Mounting and electrical connection are not properly performed.

• Changes (e.g., constructional) are made to the device.

6 GS 754B Leuze electronic

3 Controls and indicators

A

Interface P

B

LED indicators

C

Measurement range

Controls and indicators

Figure 3.1: Positioning of the controls and indicators

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Device description

4 Device description

4.1 General information

The central part of the unit is an optical sensor that generates a horizontal band of light
(figure 3.1). The band of light illuminates a CCD line array camera. This CCD array produces
an output signal that depends on the number of illuminated pixels.

The system has a permanent calibration and guarantees maximum precision and stability
at all times.

Every sensor features two interfaces (see figure 3.1).

1. Interface P (RS 232):
programming interface for configuring the measurement modes and for visualizing the
measurement values.

2. Interface M12 (process interface):
data for the control system are transmitted via this interface. Depending on the device
model used, the measurement values are output either as an analog current/voltage
signal or as digital, serial information (RS 232, RS 422).

Depending on the device model used, not all measurement values are available at the P and
M12 interfaces:

• The analog interface can only output one measurement value at a time.

• The digital interface can transmit any number of measurement values.

4.2 Optical data

GS 754B

Output modes 1 … 5 Output mode 7 (default)

Measurement range 25mm 25mm

Mouth width 27 mm/98mm 27mm/98mm

Mouth depth 42 mm 42mm

Resolution ≤ 0.1mm over the entire measurement range ≥ 0.014mm per measurement level

Smallest object ≥ 0.5 mm ≥ 0.5 mm

Light source infrared LED infrared LED

Wavelength 850nm 850nm

Table 4.1: Optical data

8 GS 754B Leuze electronic

4.3 LED indicators

LED Meaning

green, continuous light Ready

green, flashing Interference

Table 4.2: LED indicators

Device description

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Applications

3 2 1

5 Applications

5.1 Diameter determination

Depending on which interface is used, data for up to three objects can be output. Data for
more than one object can only be transmitted via the serial interface. The analog value is
always based on the edge or diameter information.

Figure 5.1: Diameter determination application example

10 GS 754B Leuze electronic

5.1.1 ASCII representation via RS 232 (P and M12 interfaces)

1

2

3 2 1

1 object 2 objects 3 objects

Transmitter Transmitter Transmitter

1

Receiver Receiver Receiver

Figure 5.2: Diameter determination - Detection of 1, 2 or 3 objects

)

Parameter ASCII output data via S1 and S2

Q,q

W,w

E,e

Single-object detection Middle pos. : xxx Diameter: xxx

Detection of two objects Middle pos. : xxx Diameter: xxx

Middle pos. : xxx Diameter: xxx

Detection of three objects Middle pos. : xxx Diameter: xxx

Middle pos. : xxx Diameter: xxx
Middle pos. : xxx Diameter: xxx

Table 5.1: ASCII representation, output modes 1 … 5

Applications

Example for xxx: 123 (12.3mm)

5.1.2 Binary representation via RS 232 (P and M12 interfaces)

Due to the fast output of measurement values, only data for single-object detection can be
output in this output mode. The measurement values cannot be displayed on the screen
(see chapter 7.2.2).

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Applications

Transmitter

5.2 Edge measurement and height verification

With this measurement, the sensor expects only one edge within the measurement field. If
more or fewer edges are detected by the system, depending on the configuration (see
chapter 6.4), this leads to an error message.

Figure 5.3: Edge measurement and height verification

1 edge

Figure 5.4: Edge measurement - Detection of 1 edge

Various configurations are possible with this measurement (see chapter 6.4).
The following only applies to devices with an analog interface:

1. Linear edge measurement over the entire measuring range (s. point 8)

2. Teach-in edge measurement with 5V-output at teaching point

12 GS 754B Leuze electronic

5.3 Width measurement

To measure the width of strip material, two GS 754B CCD forked photoelectric sensors can
be used mutually opposed from one another.

Figure 5.5: Width measurement

Each forked photoelectric sensor relays an edge position which can be extrapolated to the
total width when the distance of the sensors vis-à-vis one another is known in the control.

In conjunction with this, time synchronization of the measurement data is ensured via PIN 2
as a trigger input. If the control generates a LOW -> HIGH signal change at the trigger inputs,
then both forked photoelectric sensors simultaneously each start an output cycle.

Applications

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Device configuration

6 Device configuration

6.1 General information

To configure the GS 754B forked photoelectric sensor, you require a PC with an RS 232
interface and a terminal program with the following setting. For this, use the corresponding
KB-ODS 96-1500 cable (part no. 50082007).

6.2 Terminal program

Any terminal or modem program that can access the serial interface(s) of your PC can be
used for the configuration.

Under Microsoft

6.2.1 Basic configuration of the terminal program (interface P)

Transmission rate 9600bit/s

Data bits 8

Parity None

Stop bits 1

Protocol None

Table 6.1: Basic configuration of the terminal program (interface P)

®

Windows® 95/98/NT/2000, you can use the HyperTerminal, for example.

14 GS 754B Leuze electronic

Device configuration

6.3 Configuration of the measurement, analysis and output procedures over interface P

The appropriate configuration is activated by entering ASCII characters. Letters may be
entered in either capital or lowercase form.

6.3.1 Configuration table for GS 754B

ASCII commands Available for interface

Output mode Object type

"!" - perforated objects
"?" - homogeneous objects

1 output cycle approx. 3000ms output cycle approx. 700ms serial and analog

2 output cycle approx. 1000ms output cycle approx. 250ms serial and analog

3 output cycle approx. 500ms output cycle approx. 130ms serial and analog

4 output cycle approx. 250ms output cycle approx. 70ms serial and analog

5 output cycle approx. 100ms output cycle approx. 35ms serial and analog

6 reserved reserved

7 (default) output cycle approx. 12ms output cycle approx. 3ms serial and analog

Averaging

M,m averaging across the specified output cycle period serial and analog

A,a output of individual measurement value (default) serial and analog

Object number

Q,q single-object measurement (default) serial (only modes 1-5)

W,w measurement of two objects serial (only modes 1-5)

E,e measurement of three objects serial (only modes 1-5)

Evaluation process

= diameter detection serial and analog

- edge detection (default) serial and analog

Object type

! perforated objects serial and analog

? homogeneous objects (default) serial and analog

% semi-transparent, translucent objects serial and analog

Reset

R,r reset with config. switching output (7,a,-,o,?)

reset with config. teach input (7,a,-,t,?)

"%" - partially transparent,
translucent objects

serial and analog

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Device configuration

Edge assignment for analog output (single-object measurement)

D,d object diameter analog

$ edge, middle analog

( inner edge (default) analog

) outer edge analog

Function PIN 2

T,t teach input function analog

O,o switching output function serial and analog

S, s synchronization / trigger input function serial and analog

L, l activation input function (LED transmitter ON) serial and analog

Switching function PIN 2

< standard function (default) (chapter 6.4.6) serial and analog

> standard function, inverted (chapter 6.4.6) serial and analog

* photoelectric sensor function, dark switching

# photoelectric sensor function, light switching

Switching level PIN 2

P,p PNP switching output (default) serial and analog

N,n NPN switching output serial and analog

G,g push-pull switching output serial and analog

1) relative to the PNP switching level; refer to the following note.

Table 6.2: Parameterizing commands GS 754B

By entering the ASCII character "R", the state on delivery is restored. "R", however, has no
effect on the configuration of the switching function and the switching level.

1)

serial and analog

(presence monitoring)

serial and analog

(presence monitoring)

Notice

The descriptions of the PIN 2 switching functions (chapter 6.4.3 et seq.) always relate to the
PNP switching level.

If the PIN 2 switching level is configured to NPN, all levels must be inverted.

16 GS 754B Leuze electronic

6.4 Special configurations

Transmitter

Edge

6.4.1 Edge measurement for perforated objects

With this function, net-like objects, e.g. fabric, can be detected.

Here, the first edge of the object is output as the measurement value. All other edges are
suppressed. In this configuration the number of edges is not checked. Error messages are
not output.

Figure 6.1: Edge measurement for perforated objects

Device configuration

Required ASCII commands:

Object number

Q,q single-object measurement (default)

Evaluation process

- edge detection (default)

Object type

! perforated objects

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Device configuration

Transmitter

Edge, outside

Transmitter

Edge, middle

Transmitter

Edge, inside

Transmitter

Object diameter

6.4.2 Changeover of the edge assignment for single-object measurement

Only one piece of edge information can be output via the analog interface. With single-object
measurement, the sensor sees two edges. Using these edges, information such as object
diameter and object middle can be calculated. These edge assignments can be configured.

Figure 6.2: Changeover of the edge assignment for single-object measurement

ASCII commands for changing over the edge assignment:

Edge assignment for analog output (single-object measurement)

D,d object diameter

$ edge, middle

( edge, inside (default)

) edge, outside

18 GS 754B Leuze electronic

6.4.3 PIN 2 as a teach input

21,37 mA

[9,8 V]

0,0 mA
[0,04 V]

25,3 mm

10 mA

[5 V]

12,65 mm

Teach-point

025.3mm

12.65 mm

Transmitter

13,9 mA

[6,7 V]

0,0 mA
[0,04 V]

25,3 mm

10 mA

[5 V]

20,0 mm

6,75 mm

Teach-point

Transmitter

25.3 mm

20.0 mm

0

Connection PIN 2 of devices with analog output can be configured as a warning output or
as a teach input. If PIN 2 has been configured as a teach input, edge adjustment is possible
here at 5V. In this way, any given point of the measurement field can be assigned the output
value 5V.

6.4.3.1 Teach-in in the middle of the measurement field

The measurement value is output linearized. As a result, the entire measurement field is
available for the measurement.

Figure 6.3: Teach-in (edge in the middle of the measurement field)

6.4.3.2 Teach-in at the end of the measurement field

The measurement value is output linearized. The measurement field range is restricted. A
change in measurement value no longer occurs at the beginning of the measurement field.

.

Device configuration

Figure 6.4: Teach-in (edge at the end of the measurement field)

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Device configuration

24 mA

[11 V]

6,2 mA
[3,1 V]

17,4 mm

10 mA

[5 V]

5 mm

25,3 mm

Teach-point

Transmitter

25.3 mm0

5mm

6.4.3.3 Teach-in at the start of the measurement field

The measurement value is output linearized. The measurement field range is restricted. A
change in measurement value no longer occurs at the end of the measurement field.

Figure 6.5: Teach-in (edge at start of the measurement field)

6.4.4 PIN 2 as a synchronization / trigger input

If PIN 2 is configured as a trigger input, the GS 745B CCD forked photoelectric sensor
remains inactive as long as there is a LOW signal at PIN 2.

If the external signal changes from LOW to HIGH, the forked photoelectric sensor then
performs exactly one measurement and outputs the configured measurement data.

The duration of this measurement varies depending on the set measure mode. The average
value of the individual measurements is calculated within the set time (n • 12ms).

6.4.5 PIN 2 as an activation input

If PIN 2 is configured as an activation input, the GS 745B CCD forked photoelectric sensor
remains inactive as long as there is a LOW signal at PIN 2.

If there is a HIGH signal at PIN 2, the forked photoelectric sensor is activated and repeatedly
performs measurements as long as the HIGH signal remains at PIN 2.

The measurement data are output at the interfaces depending on the measure mode set.

20 GS 754B Leuze electronic

6.4.6 PIN 2 as a switching output

Transmitter

Transmitter

Transmitter

Transmitter

Transmitter

Transmitter

Transmitter

Transmitter

Transmitter

When PIN 2 is configured as a switching output, various logical functions can be assigned
to this switching output. A distinction is made between standard and photoelectric sensor
functions/presence monitoring.

Configuration Function Object partially in

< standard high low high
> standard inverted low high low

* dark switching high high low
# light switching low low high

6.4.6.1 Standard function

The number of object edges is monitored.

Example of diameter detection:

In this setting, the sensor expects two object edges. If more or fewer object edges are
detected, an error message is output.

measurement field

Device configuration

Switching output pin 2

Object completely in

measurement field

Object not in

measurement field

Two edges

→ OK

One edge

→ error

Three edges

→ error

No edge

→ error

No edge

→ error

Figure 6.6: Example of diameter detection

Example of edge detection:

In this setting, the sensor expects only one object edge. If more or fewer object edges are
detected, an error message is output.

One edge

→ OK

Two edges

→ error

No edge

→ error

No edge

→ error

Figure 6.7: Example of edge detection

Leuze electronic GS 754B 21

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Device configuration

Transmitter

Transmitter

Transmitter

Transmitter

Transmitter

Transmitter

Transmitter

Transmitter

6.4.6.2 Standard function, inverted

The number of object edges is monitored and output inverted.

6.4.6.3 Photoelectric sensor function, dark switching

When configured for the photoelectric sensor function, the number of edges is not moni­tored. The entire measuring range is analyzed as a throughbeam photoelectric sensor. The
switching output functions on a dark-switching basis.

Light beam interrupted

→ Output "HIGH"

Light beam interrupted

→ Output "HIGH"

Light beam interrupted

→ Output "HIGH"

Figure 6.8: Photoelectric sensor function, dark switching

6.4.6.4 Photoelectric sensor function, light switching

With photoelectric sensor level, the entire measurement range is analyzed as a throughbeam
photoelectric sensor. The switching output functions on a light-switching basis.

Light beam interrupted

→ Output "LOW"

Light beam interrupted

→ Output "LOW"

Light beam interrupted

→ Output "LOW"

Figure 6.9: Photoelectric sensor function, light switching

Light beam not interrupted

→ Output "LOW"

Light beam not interrupted

→ Output "HIGH"

22 GS 754B Leuze electronic

Measurement range and resolution

20 mA

[10 V]

4 mA

[2 V]

25,3 mm

7 Measurement range and resolution

The detection range of the GS 754B forked photoelectric sensor is max. 28.6mm
(2048 • 14µm).
The maximum measurement range is 25.3mm.

Measurement values of the serial and analog interfaces are linearized.

The sensor makes the measurement values available in the following resolutions, depending
on the output mode chosen:

Resolution:

Output modes 1 … 5 Output mode 7 (default)

Serial interface

Analog interface

7.1 Analog measurement value output (interface M12)

The analog current and voltage values are available only at the M12 interface. The data
formats which are output differ depending on the type and configuration used. In output
modes 1...5 and in output mode 7, the resolution/measurement resolution changes as
follows.

Analog current

Analog voltage

Table 7.1: Data formats for analog interface M 12

0.1mm (ASCII) 0.014mm (binary)

0.1mm (current/voltage) 0.014mm (current/voltage)

Output modes 1 … 5 Output mode 7 (default)

0.063 mA / 0.1mm 11.72μA / 14μm

0.0316 V / 0.1mm 5.37mV / 14 μm

Output modes 1 … 5:

In output modes 1 … 5, the measurement values are scaled. These measurement values
are adapted to the standard 4 … 20mA (2 … 10 V) interface via the internal microcontroller.
The resulting measurement field for output modes 1 … 5 is 25.3 mm (1807 * 14 m).

Figure 7.1: Linearity in output modes 1 … 5

Leuze electronic GS 754B 23

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Measurement range and resolution

21,37 mA

[9,8 V]

0,0 mA
[0,04 V]

25,3 mm

Output mode 7 (default):

In output mode 7, the measurement values are not scaled. Each measurement value is
output directly. The resulting measurement field for output mode 7 is 25.3mm (1807 * 14µm)
with an output current of 0 … 21.37mA (0.04 … 9.8V).

Figure 7.2: Linearity in output mode 7

7.2 Digital measurement value output (P and M 12 interfaces)

The measurement value output is dependent on the type of sensor used and the configu­ration set.

There are a number of different output modes available.

These are divided into two primary output variants:

1. Output modes 1, 2, 3, 4, 5:
the measurement value output is performed at 0.3Hz, 1Hz, 2Hz, 4Hz or 10 Hz. The
measurement values are linearized by the sensor and converted to mm values. Con­version of the pixel data is no longer necessary. The sensor transmits the measurement
values to interfaces P and M12. The digital information is, in this case, transmitted in
ASCII format and can be read using the monitor program. The resolution is 0.1mm.

2. Output mode 7:
the measurement value output is performed at 80Hz. The sensor transmits the mea­surement values to interfaces P and M12. In this case, digital information is transmitted
in binary format and can be read with the monitor program. The resolution is 0.014mm.

The various output formats are explained on the following pages using examples.

24 GS 754B Leuze electronic

7.2.1 ASCII format for P and M12 interfaces

0

250

Middle-Pos. = 125

Transmitter

Readable ASCII data are only output via the digital interfaces in output modes 1, 2, 3, 4, 5.
The resolution is 0.1 mm.

ASCII commands Measurement value output in ASCII format

=, q, 5 Diameter detection Middlepos. : xxx Diameter: xxx

-, q, 5 Edge detection Edge-Pos. : xxx

Table 7.2: ASCII format for P and M12 interfaces

Example of diameter detection:

Measurement range and resolution

Leuze electronic GS 754B 25

Figure 7.3: Ex. diameter detection (ASCII format)

Middle-Pos.: 125 (equivalent to 12.5 mm)
Diameter: 020 (equivalent to 2.0 mm)

The middle of the object is located at CCD position 12.5mm.
The object diameter is 2.0mm.

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Measurement range and resolution

0

250

Edge-Pos. = 185

Transmitter

Example of edge detection:

Figure 7.4: Ex. edge detection (ASCII format)

Edge-Pos.: 185 (equivalent to 18.5mm)

The edge of the object is located at CCD position 18.5mm.

7.2.2 Binary format for the P and M12 interfaces

Binary data is only output via the digital interfaces in output mode 7. This binary data cannot
be displayed by the terminal program.

The resolution is 0.014mm.

ASCII commands

=, q, 7 Diameter detection

-, q, 7 Edge detection

Table 7.3: Binary format for the P and M 12 interfaces

26 GS 754B Leuze electronic

Measurement range and resolution

01807

Middle-Pos. = 893

Transmitter

Example of diameter detection:

Measurement value output in binary format

Data Byte designator

D

5D4D3D2D1D0

Middle-Pos. (low byte) 0 0 byte 0
Middle-Pos. (high byte) 0 1 byte 1
Diameter (low byte) 1 0 byte 2
Diameter (high byte) 1 1 byte 3

Figure 7.5: Ex. diameter detection (binary format)

The middle of the object is located at CCD pixel 893.

The diameter of the object is 143 pixels.

P

P

1

0

D

5D4D3D2D1D0

111101 0 0 byte 0 001101111101
001101 0 1 byte 1

001111 1 0 byte 2 000010001111
000010 1 1 byte 3

Leuze electronic GS 754B 27

Measurement value output in binary format

Data Byte designator

P

1

P

0

value: 893

(893 x 0.014mm = 12.5 mm)

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value: 143

(143 x 0.014mm = 2.0mm)

Measurement range and resolution

01807

Edge-Pos. = 1321

Transmitter

Example of edge detection:

Measurement value output in binary format

Data Byte designator

D

5D4D3D2D1D0

Edge-Pos. (low byte) 0 0 byte 0
Edge-Pos. (high byte) 0 1 byte 1

Figure 7.6: Ex. edge detection (binary format)

The edge of the object is located at CCD pixel 1321.

Measurement value output in binary format

Data Byte designator

D

5D4D3D2D1D0

101001 0 0 byte 0 010100101001
010100 0 1 byte 1

P

P

P

1

1

0

P

0

value: 1321

(1321 x 0.014mm = 18.5 mm)

28 GS 754B Leuze electronic

Error messages (P and M12 interfaces)

8 Error messages (P and M12 interfaces)

Errors vary depending on the configured measurement, analysis and output variants. The
errors are output at interfaces P and M12.

Serial
output

Analog
current

Analog
voltage

Modes 1 … 5 000 555 999

Mode 7 0 2047 0

Modes 1 … 5 3.5mA

Mode 7 0mA

Modes 1 … 5 1.75V

Mode 7 0V

9 Service and support

24-hour on-call service at: [phone]

Service hotline: [phone]

Monday to Thursday, 8.00 a.m. to 5.00 p.m. (UTC+1)

Friday, 8.00 a.m. to 4.00 p.m. (UTC +1)

E-mail: [e-mail]

Return address for repairs:

Servicecenter Leuze electronic GmbH + Co. KG
In der Braike 1
D-73277 Owen
Germany

Fewer edges than

specified

More edges than

specified

>20mA >20mA

>10V >10V

Light path fully blocked

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Leuze electronic GS 754B 29

Specifications

10 Specifications

10.1 Optical data

Mouth width GS 754B/...-27…: 27mm

Mouth depth 42mm
Measurement range 25mm
Resolution

1)

Reproducibility ± 0.03mm
Linearity ± 0.36mm
Minimal object diameter 0.5mm
Object position any
Light source LED (modulated light)
Wavelength 850nm

1) System resolution, i.e. smallest practical value for the last position of the display.

2) Objects < 1 mm should be scanned in front of the receiver.
Extraneous light sources must not beam into the receiver from the front.

10.2 Timing

Response time min. 12ms
Output cycle 0.012 … 3.00s
Delay before start-up ≤ 300ms

10.3 Electrical data

Operating voltage U

Residual ripple ≤ 15 % of U
Open-circuit current ≤ 60mA

1) Protective extra-low voltage (VDE 0100/T 410).
For UL applications: only for use in class 2 circuits according to NEC.

GS 754B/...-98…: 98mm

a: 0.1mm (modes 1 … 5)
b: 0.014mm (mode 7, default)

2)

1)

B

with RS 232/RS 422: 10 … 30VDC
(incl. residual ripple)
with analog output: 18 … 30VDC
(incl. residual ripple)

B

30 GS 754B Leuze electronic

Electrical connection

Functional earth
must be wired.

Device models PIN1 PIN2 PIN3 PIN4 PIN5
RS 232

RS 422
Analog voltage
Analog current

10.4 Output signals

Level active/not active ≥ 8V/≤ 2 V or not connected
Activation/disable delay ≤ 1ms
Input resistance approx. 6kΩ
Switching output current pin 2: max. 100mA
Analog output current (0)4 … 20mA (depending on output mode),

Analog output voltage (0)2 … 10V (depending on output mode),

Serial interface RS 232/RS 422
Teach input pin 2 reversible
Switching output pin 2 reversible

10…30V DC
10…30V DC
18…30V DC
18…30V DC

I/O

Tx-

I/O
I/O

R

L

R

L

GND
GND
GND
GND

≤ 500Ω

≥ 2kΩ

TxD

Tx+
analog
analog

Specifications

FE - functional earth
FE - functional earth
FE - functional earth
FE - functional earth

10.5 Mechanical data

Housing diecast zinc
Weight GS 754B/...-27…: 270g

Optics cover plastic
Connection type M12 connector, metal, 5-pin

1) Only fiber-free cloths may be used to clean the lens covers.
Tips and hard objects damage the lens.

Leuze electronic GS 754B 31

GS 754B/...-98…: 290g

1)

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Specifications

10.6 Environmental data

Ambient temp. (operation/storage) -20°C … +50°C/-30 °C … +60 °C
Protective circuit

1)

1, 2, 3
VDE safety class III
Protection class IP 67
Light source exempt group (in acc. with EN 62471)
Standards applied IEC 60947-5-2
Certifications UL 508, C22.2 No.14-13

1) 1=transient protection, 2=polarity reversal protection, 3=short circuit protection for all output.

2) Protective extra-low voltage (VDE 0100/T 410).
For UL applications: only for use in class 2 circuits according to NEC.

These proximity switches shall be used with UL Listed cable assemblies rated

3)

30V, 0.2A min, in the field installation, or equivalent (categories: CYJV/CYJV7 or
PVVA/PVVA7).

2) 3)

32 GS 754B Leuze electronic

11 Order guide and accessories

11.1 Order guide

Selection table

Order code 

Order guide and accessories

Equipment 
Mouth width 27mm 

Output variants RS 232 

Pin 2, configurable I/O   

11.2 Accessories

11.2.1 Connection cables

Part no. Type designation Description

50114692 KB DN/CAN-2000 BA Connection cable, M12 socket axial, 5 pin, A-coded;

50114696 KB DN/CAN-5000 BA Connection cable, M12 socket axial, 5 pin, A-coded;

50114699 KB DN/CAN-10000 BA Connection cable, M12 socket axial, 5 pin, A-coded;

11.2.2 Configuration cable

Part no. Type designation Description

50082007 KB-ODS 96-1500 Connection cable, Sub-D socket, 9-pin; length 1500 mm;

GS 754B/D24-27-S12

Part no. 50115807

GS 754B/D3-27-S12

Part no. 50115806

GS 754B/V4-27-S12

Part no. 50115809

GS 754B/C4-27-S12

Part no. 50115803

GS 754B/D24-98-S12

Part no. 50119710

GS 754B/D3-98-S12

Part no. 50119711

GS 754B/V4-98-S12

Part no. 50117818

GS 754B/C4-98-S12

Part no. 50119712

98mm 

RS 422 
Analog voltage 
Analog current 

length 2000 mm; open cable end; PUR; shielded

length 5000 mm; open cable end; PUR; shielded

length 10000 mm; open cable end; PUR; shielded

configuration connector GS 754B

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Leuze electronic GS 754B 33

Declaration of conformity

12 Declaration of conformity

The GS 754B measuring CCD forked photoelectric sensors have been developed and
manufactured in accordance with the applicable European standards and directives.

Notice

A corresponding Declaration of Conformity can be requested from the manufacturer.

The manufacturer of the GS 754B CCD forked photoelectric sensors, Leuze electronic
GmbH + Co. KG in D-73277 Owen, possesses a certified quality assurance system in
accordance with ISO 9001.

34 GS 754B Leuze electronic