EUCHNER EKS User Manual

More than safety.

EKS

EKS

Electronic-Key-System

2

Quality, reliability, precision

Quality, reliability and precision are the
hallmarks of our corporate philosophy.
They represent concepts and values
to which we feel totally committed.
At EUCHNER, quality means that all
our employees take personal respon­sibility for the company as a whole
and, in particular, for their own field of
work. This individual commitment to
perfection results in products which
are ideally tailored to the customers’
needs and the requirements of the
market. After all: our customers and
their needs are the focus of all our
efforts. Through efficient and effective
use of resources, the promotion of
personal initiative and courage in find­ing unusual solutions to the benefit of
our customers, we ensure a high level
of customer satisfaction. We familiar­ize ourselves with their needs, require­ments and products and we learn
from the experiences of our cus­tomers’ own customers.

EUCHNER – More than safety.

Quality –made by EUCHNER

More than safety.

Around the world – the Swabian
specialists in motion sequence
control for mechanical and sys­tems engineering.

EUCHNER’s history began in 1940 with
the establishment of an engineering
office by Emil Euchner. Since that
time, EUCHNER has been involved in
the design and development of switch­gear for controlling a wide variety of
motion sequences in mechanical and
systems engineering. In 1953, Emil
Euchner founded EUCHNER + Co., a
milestone in the company’s history. In
1952, he developed the first multiple
limit switch

–

to this day a symbol of
the enterprising spirit of this family­owned company.

Automation – Safety – ManMachine

Today, our products range from
electromechanical and electronic
components to complex system solu­tions. With this wide range of products
we can provide the necessary tech­nologies to offer the right solution for
special requirements – regardless of
whether these relate to reliable and
precise positioning or to components
and systems for safety engineering in
the automation sector.
EUCHNER products are sold through a
world-wide sales network of compe­tent partners. With our closeness to
the customer and the guarantee of
reliable solutions throughout the
globe, we enjoy the confidence of cus­tomers all over the world.

Emil Euchner, the

company’s founder and

inventor of the multiple

limit switch, circa 1928.

ManMachine

Contents

3

Application 4

Key management using the Electronic-Key-Manager 4

System overview 4

All the advantages at a glance 5

Approvals 5

Integration 5

Version

FSA

5

Electronic-Key adapter with serial Interface 6

Electronic-Key adapter with USB interface 7

Electronic-Key adapter with USB interface version

FSA

8

Electronic-Key adapter with Ethernet interface 9

Electronic-Key adapter with Ethernet interface version

FSA

10

Electronic-Key adapter with Profibus DP interface 11

Electronic-Key adapter with Profibus DP interface version

FSA

12

Electronic-Key read/write 13

Transponder Coding (TC) 14

Electronic-Key-Manager (EKM) 15

Accessories 16

Software and user manuals 17

Electronic-Key-System (EKS)

Technical Status 08-06/08

4

Electronic-Key-System (EKS)

Subject to technical modifications; no responsibility is accepted for the accuracy of this information.

Application

With the Electronic-Key System (EKS), it does not matter if
a password is forgotten. EKS is used for electronic access
management on PCs and control systems.

Nowadays access rights are usually controlled by the issue of
passwords. In practice, however, this often leads to unauthorized
changes to systems.

This is where the Electronic-Key System can be put to optimal
use: in comparison to the issue of a password, considerably
more responsibility is assigned to the owner of an Electronic-Key.

The Electronic-Key provides protection against unauthorized
access to operation and visualization systems. Often only specific
people have permission to change the system parameters on critical
systems. This is the ideal application for EKS.

In a typical application, the user has an access right at a specific
level via the Electronic-Key.

An example:

 Level 1: Start and stop installation

 Level 2: Change process parameters

 Level 3: Manage Electronic-Keys

The Electronic-Keys are available in different colors with identical
functionality. The colors can be used, for example, to indicate
the different levels of access rights.

System overview

In principle EKS comprises two components: an Electronic-Key
and the matching Electronic-Key adapter.

Integrated into the Electronic-Key in the form of a robust tag are
a memory chip and an antenna (transponder). This is in fact an
inductive identification system with:

 Transponder without battery

In operation the Electronic-Key is inserted into the Electronic-Key
adapter and is held in place by a spring clip. The power supply
for the transponder and the data are transferred between the
Electronic-Key adapter and the Electronic-Key without using any

contacts.

Key management using the Electronic-Key­Manager

The Electronic-Keys can also be managed on separate workstations
using the Electronic-Key-Manager (EKM) software.

Along with passwords or other personal data, it is also possible
to save process-related information, e.g. recipes or parameters
for the machine control system, on the Electronic-Key and retrieve
the data in production.

The data carrier in the Electronic-Key is equipped with a combined
read/write and fixed-code memory:

 116 bytes E²PROM (programmable) plus an additional

8 bytes ROM (serial number)

The Electronic-Key adapter is a read/write system with
integrated evaluation electronics and interface. Device
variants with the following interfaces are available for system
connection:

 Serial RS232/RS422, switchable

 USB

 Ethernet

 Profibus DP

The Electronic-Key adapters with serial interface and Ethernet
interface can be connected to a PC or a control system. The
advantage of Ethernet is that EKS can be physically remote.
The Electronic-Key adapter with USB interface is particularly
suitable for connecting to a PC. The major advantage is that
power is supplied via the USB connection.

The Electronic-Key adapter with integrated Profibus DP interface
is connected to the fieldbus via a standard Profibus cable as
a subscriber. The Profibus variant is used as a matter of
preference for control systems. Also in this variant, the EKS
can be used remotely from the control system, e.g. at assembly
workplaces.

Electronic-Key-System (EKS)

Subject to technical modifications; no responsibility is accepted for the accuracy of this information.

5

All the advantages at a glance

With EKS, very fast log-on is possible without the use of a password
even on systems without a keyboard. In addition, it is sensible to
program the application to permit system access only as long as
the Electronic-Key is positioned in the Electronic-Key adapter. Then
when the Electronic-Key is removed, e. g. access to specific functions
on the system is automatically inhibited.

A major advantage is the flexibility of the system:

 Easy assignment and alteration of the access rights level

 Access for lost Electronic-Keys can be disabled

 Fast assignment of additional Electronic-Keys

Along with the level for the access rights, e. g. the name of the
user can be programmed into the Electronic-Key read/write in
plain text.

For quality assurance in accordance with ISO 9000, it is
possible to log accesses and changes when using EKS.

The EKS system also makes it possible, for example, to log
product parameters and operator entries in accordance with FDA
standard 21 CFR part 11. EKS can be used in this context as an
electronic signature for personal confirmation of work steps.

Due to the transfer of data without using any contacts, it was possible
to design the Electronic-Key adapter with the high degree of

protection IP 67 from the access side, i.e. it is suitable for
industrial use. The Electronic-Key adapter can be installed in

accordance with DIN 43700 in any control panel with a standard
cut-out of 33 mm x 68 mm. It is fastened by means of screw clamp
elements from the rear side of the panel in order to prevent
unauthorized tampering from the operator side.

1) Microsoft Windows® and ActiveX® are registered trademarks of Microsoft Corporation

On Electronic-Key adapters that are used as pure read stations
on the production line, write protection can be enabled using

a DIP switch to further increase protection against tampering.

Approvals

The EKS Electronic-Key adapters are certified in accordance with

(UL file number E240367).

Integration

The user is responsible for organizing the programming of the
application, integration in an overall system and assignment and
use of the freely programmable memory in the Electronic-Key.

Interfacing of the EKS Electronic-Key adapters with serial, USB
or Ethernet interface to the user’s PC application is supported
by optionally available ActiveX® modules 1) (can be used if
Microsoft Windows® 1) based user programs support ActiveX®) .
EKS can thus be used, e. g., in conjunction with process
visualization software. Data communication is in accordance with
transfer protocol 3964R respectively TCP/IP. The ActiveX

®

module is used here as a protocol driver.

To operate the EKS Electronic-Key adapter with USB interface on
the PC, USB driver software must be installed. The USB interface is
designed as a virtual serial COM port. The communication over the
interface is exactly the same as for the device with serial interface.
Therefore devices with serial interface and USB interface are
interchangeable with regard to software applications.

If a database is established to use the unique Electronic-Key
serial number, it is not imperative to write to the Electronic-Key.
As an option, the Transponder Coding software can be used
for straightforwardly writing and reading the Electronic-Key on
the PC. Furthermore, the Electronic-Key-Manager, a flexible
software package, is available for programming and managing
the Electronic-Keys on the PC including database for the
Electronic-Keys. The freely programmable memory on the
Electronic-Key can be structured exactly as required using EKM.

Commissioning and system integration is significantly simp-
ler and easier using the EKS with Profibus interface. The
bus address is set using DIP switches. The EKS is integrated in
the software using the GSD file and the data are available in the
bus master’s input area immediately after connection.

Version

FSA

As an alternative, the Electronic-Key adapters with USB, Ethernet
and Profibus interface are available in the

FSA

(For Safety

Applications) version. To solve the widespread problem of

tampering with safety guards, EKS has been expanded for safety­related applications in conjunction with operating mode
selection. In this case trained personnel are specifically
authorized to perform critical setup and maintenance work in a
special, hazardous operating mode.

This version has additional switched outputs that can be utilized
to form a safe shut-down signal. In this case, a safe evaluation
device must be connected downstream. This means that the

EKS

FSA

can be used for safety-relevant applications. The
machine is reset to a safe operating mode by removing the
Electronic-Key.

6

Electronic-Key-System (EKS)

Subject to technical modifications; no responsibility is accepted for the accuracy of this information.

Electronic-Key adapter with serial Interface

Technical data

General parameters Value Unit

min. typ. max.
Housing plastic (PA 6 GF30 gray)
Degree of protection according to EN 60529 IP 67 in mounted condition
Ambient temperature at UB = DC 24 V 0 + 55 °C
Mounting cut-out according to DIN 43700 33 x 68 mm
Connection type for power supply plug-in screw terminal, 3-pole
Operating voltage UB (regulated, residual ripple < 5%) 20 24 28 V DC
Current consumption 100 mA

Interface, data transfer

Interface to the PC or to the control system serial RS232 / RS422

(selectable via DIP switch)
Transfer protocol 3964R
Data transfer rate 9.6 kbaud
Data format 1 start bit, 8 data bits, 1 parity bit (even parity), 1 stop bit
Connection type for serial interface Sub-D socket 9-pole
Cable length RS232 5m
Cable length RS422 1000 m
LED indicator green: “Ready” (in operation)

yellow: “Electronic-Key active” *

* The LED illuminates yellow if there is a functional Electronic-Key in the Electronic-Key adapter.

Ordering table

Designation Item Order No.

Electronic-Key adapter with serial Interface EKS-A-ISX-G01-ST09/03 084 750

Dimensions in mm

Dimension drawing

serial

RS422

RS232

Typical applications

 Connection to PC. Interfacing via ActiveX

®

module in Windows

®

 Connection to control system or micropro-

cessor. Interfacing via programming based
on the 3964R protocol

40

75

83

8

LED

1,5

(Dichtgummi /

washer)

67

max. 4 mm

M

4

50 10

60

70

76

DIP-Schalter /
DIP-switch

32

UB 0 V OUT