Catalogues - catalog-identification-systems

Catalogue Catalog Identification Systems

www.pepperl-fuchs.com

Page

/ 205

Make a request

/ 205

See other catalogues for PEPPERL & FUCHS

Text version of the page

Identification Systems - Introduction

Optical identification systems

The standard optical identification systems are pure fixed code systems. The code is located on a label, e.g. as barcode or as two-dimensional Matrix code. These labels are optically scanned or photographed using the reflection principle and the code is read on the basis of successive differences of intensity. The barcode reading devices (scanners) are usually connected with each other using a CAN bus and are transmitted collectively to the higher-level Fieldbus. The Matrix codes are read by a industrial camera using an image recognition method and are usually directly connected to a Fieldbus.

0128016691675

1.4 Selection criteria for identification systems

In the following table, all systems with their features are compared. The application-specific notes below offer further decision support.


	Inductive		Microwave		Optical
	System IV	System IP	System MV	System MT	Barcode	Data Matrix
Frequency	200-300 kHz	125 kHz	2.45 GHz	2.45 GHz	visible spectrum
Max. passing speed - read fixed code - read data - write data*	10 m/s 2 m/s 0.2 m/s	2.5 m/s 0.5 m/s 0.4 m/s	< 30 m/s < 30 m/s < 30 m/s	25 m/s 25 m/s 1 m/s	20 m/s 20 m/s	6 m/s 6 m/s
Memory volume	1 Kbit (passive) 64 Kbits (active)	928 bits R/W plus 64 bits R/O	256 Kbits and 64 Kbits	574 bits	128 bits	8 Kbits
Possible read distances	< 100 mm	< 140 mm	< 2000 mm	< 4000 mm	<2500 mm	< 300 mm
Possible write distances	< 68 mm	< 80 mm	< 2000 mm	< 500 mm	-	-
Mounting of the code/data carriers - in metal - on metal	Yes Yes	Yes Yes	No Yes	No Yes	No Yes	No Yes
Protection class of the code/data carriers	IP68/IP69k	IP68/IP69k	IP67	IP67
Bus interfaces	Serial Profibus Interbus 16 bits I/O 4 bits relay Allen Bradley Remote I/O	Serial Profibus Interbus DeviceNet Ethernet Allen Bradley Remote I/O	Serial Profibus Ethernet	Serial	Serial Profibus	Serial
Special features	Particularly EMC stable	Cost-effective data carriers	High data transfer rate	Multitag-capable, relay output	Cost-effective labels, high scan rate	Small labels, high data volume

It is recommended to carry out write processes in standstill and perform a control reading of the data afterwards.

Subject to reasonable modifications due to technical advances.

Pepperl+Fuchs Group • Tel.: Germany +49 621 776-0 • USA +1 330 4253555 • Singapore +65 67799091 • Internet http://www.pepperl-fuchs.com