EUCHNER EKS User manual

Electronic-Key-System
Manual
Electronic-Key Adapter EKS and EKS FSA
with Profibus-DP Interface
Order No. 092 009

Manual EKS Electronic-Key Adapter Profibus-DP
Table of contents
1 General notes...............................................................................................................................................4
1.1 Use of the manual..................................................................................................................................4
1.1.1 Explanation of symbols..............................................................................................................4
1.1.2 Abbreviations .............................................................................................................................5
1.2 CE conformity ........................................................................................................................................5
1.3 Approvals...............................................................................................................................................5
1.4 Correct use ............................................................................................................................................5
1.5 Obligations on the operating organization.............................................................................................6
2 Safety precautions ......................................................................................................................................7
3 Function........................................................................................................................................................8
3.1 Functional description............................................................................................................................8
3.1.1 Common functions of EKS Standard and version EKS FSA.....................................................8
3.1.2 Additional functions of the version EKS FSA.............................................................................9
4 Technical Data ...........................................................................................................................................11
4.1 Dimension drawing of Electronic-Key adapter.....................................................................................11
Version EKS-A-IDX-G01-ST09/03 with Profibus-DP interface............................................................11
4.1.2 Version EKS-A-IDXA-G01-ST09/03/04 (EKS FSA) with Profibus-DP interface......................11
4.2 Technical data, Electronic-Key adapter...............................................................................................12
4.3 Pin assignment ....................................................................................................................................13
4.3.1 Socket, Profibus-DP.................................................................................................................13
4.3.2 Plug-in screw terminals for power supply ................................................................................13
4.3.3 Plug-in screw terminals for outputs LA1/LA2 and LB1/LB2 (EKS FSA only)...........................13
4.4 DIP switch settings...............................................................................................................................14
4.5 LED indicator .......................................................................................................................................14
4.6 Profibus-DP..........................................................................................................................................15
Specification for bus cables.................................................................................................................15
4.6.1 Bus connection.........................................................................................................................15
4.6.2 Permissible cable lengths........................................................................................................15
5 Mounting.....................................................................................................................................................16
6 Electrical connection ................................................................................................................................17
6.1 Connection of Profibus-DP..................................................................................................................17
6.2 Connection of power supply ................................................................................................................18
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Manual EKS Electronic-Key Adapter Profibus-DP
6.3 Connection of function earth................................................................................................................18
6.4 Connection of the switched outputs (for EKS FSA only).....................................................................18
6.4.1 Connection example with enabling switch...............................................................................19
6.4.2 Connection example without enabling switch..........................................................................22
7 Setup...........................................................................................................................................................25
8 Operation on the Profibus-DP..................................................................................................................26
8.1 Communication parameters (GSD file)................................................................................................26
8.2 Parameterization message..................................................................................................................27
8.3 Configuration message........................................................................................................................28
8.4 Diagnostics message...........................................................................................................................28
8.5 EKS diagnostics byte...........................................................................................................................28
8.6 Read/write operation in conjunction with Electronic-Key read/write....................................................29
8.6.1 Reading the content of the Electronic-Key ..............................................................................29
8.6.2 Reading/writing any data areas ...............................................................................................30
8.6.3 Reading the serial number.......................................................................................................31
8.7 Read-only operation in conjunction with Electronic-Key read-only .....................................................31
9 Exclusion of liability..................................................................................................................................32
10 Service and repair .....................................................................................................................................32
11 Guarantee...................................................................................................................................................32
12 Bibliography...............................................................................................................................................32
13 Appendix ....................................................................................................................................................33
13.1Timing diagram....................................................................................................................................33
13.1.1 Explanations.............................................................................................................................33
13.2Input area of the bus master................................................................................................................34
13.3Output area of the bus master.............................................................................................................35
13.4Diagnostics area of the bus master.....................................................................................................35
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Manual EKS Electronic-Key Adapter Profibus-DP
1 General notes
1.1 Use of the manual
This manual describes the technical features and the function of the EKS Electronic-Key adapter
EKS-A-IDX-G01-ST09/03 with Profibus-DP interface (order no. 084 800) as well as the version
EKS-A-IDXA-G01-ST09/03/04, EKS For Safety Applications (EKS FSA, order no. 100 378). The complete
evaluation and interface electronics are integrated in these units.
1.1.1 Explanation of symbols
The following symbols are used in this manual to identify important instructions and useful information:
Danger!
Identifies an immediate hazard. If not avoided, the consequence will be fatality or very serious injuries.
Warning!
Identifies a possible hazard. If not avoided, the consequence may be fatality or very serious injuries.
Caution!
Identifies a possible hazard. If not avoided, minor injuries or damage may result.
Attention!
Risk of damage to material or machine or degradation of function.
Information!
Important information is provided to the user here.
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Manual EKS Electronic-Key Adapter Profibus-DP
1.1.2 Abbreviations
The following abbreviations are used in this manual:
fDIP Dual Inline Package
fDP Decentral Peripheral
fE²PROM Electrically Erasable Programmable Read-Only Memory
fEKS Electronic-Key-System
fEKS FSA Electronic-Key-System For Safety Applications
fGSD GeräteStammDaten (device data)
fLED Light Emitting Diode
fLSB Least Significant Bit
fMSB Most Significant Bit
fPA PolyAmide
fROM Read-Only Memory
fSRD Send and Request Data with acknowledge
fSDN Send Data with No acknowledge
1.2 CE conformity
The EKS Electronic-Key adapter with Profibus-DP interface conforms to the EMC directive 2004/108/EC
(89/336/EEC, 92/31/EEC, 93/68/EEC) and the low voltage directive 2006/95/EC (73/23/EEC, 93/68/EEC,
98/79/EC).
The Electronic-Key adapter complies with the following European / international standards:
fEN 61000-6-2 Electromagnetic compatibility (EMC). Generic standards - Immunity for industrial
environments
fEN 55011 Industrial, scientific and medical (ISM) radio-frequency equipment -
fRadio disturbance characteristics - Limits and methods of measurement
1.3 Approvals
The EKS Electronic-Key adapter with Profibus interface is certified to (certificate number 170205 –
E240367).
For use and operation as per the requirements, a power supply for use in class 2 circuits must be used.
1.4 Correct use
As part of a higher-level overall system, the EKS Electronic-Key adapter is used for access control and
monitoring on controllers or parts of controllers for machine installations. EKS can be used, for example, as part
of an overall system for checking access rights for operating mode selection. However, it is not permitted to
directly derive the operating mode from the access rights on the Electronic-Key. If the selection of the operating
mode is relevant for safety, this must not be performed by means of the EKS; instead an additional device must
be used to select the operating mode. This is possible via the graphical user interface on the control system, for
example.
The version EKS FSA has outputs that can be utilized to form a safe shut-down signal (for block diagram see
section 3.1.2). For this purpose a safe evaluation must be included downstream. The EKS FSA can then be
used for safety-related tasks. The machine must be reset to a safe operating mode by removing the Electronic-
Key. A hazard analysis on this aspect must be prepared as per the requirements in the machinery directive.
The risk and the necessary risk minimization by technical means must be determined using a suitable standard.
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Manual EKS Electronic-Key Adapter Profibus-DP
The following requirements must be met for usage:
fThe data signal (channel LB) and the switched output LA1/LA2 (channel LA) must be polled by a safe
downstream evaluation to suit the risk determined. The data wire (channel LB) is used to supply the
information as to whether or not an Electronic-Key is inserted and which access rights are assigned to the
Electronic-Key. The output LA1/LA2 (channel LA) is used for the redundant supply of the information as to
whether or not an Electronic-Key is inserted (independent of the access rights). The data wire or,
alternatively, the switched output LB1/LB2 can be used as channel LB. The output LB1/LB2 is used to
supply (like LA1/LA2) only the information as to whether or not an Electronic-Key is inserted (independent of
the access rights). The usage of the output LB1/LB2 is optional.
fThe control system must check whether the Electronic-Key inserted is authorized to select the operating
mode and whether the access rights on the Electronic-Key permit operation in the operating mode currently
selected.
fThe user must select the related operating mode using the control system or another suitable circuit.
fThe manufacturer of the system must check which safety level is reached with the overall system and
whether the overall system provides adequate safety against hazards in the intended application.
Information!
The machinery directive 98/37/EC provides information on selection of the operating mode. It is
imperative this information is followed.
When designing machines and using the Electronic-Key adapter, the national and international regulations and
standards specific to the application must be observed, e.g.:
fEN 60204, Safety of machinery. Electrical equipment of machines
fEN 12100-1, Safety of machinery. Basic concepts, general principles for design - part 1: basic terminology,
methodology
fEN 954-1, Safety of machinery. Safety related parts of control systems - part 1: general principles for design
fEN 62061, Safety of machinery. Functional safety of safety-related electrical, electronic and programmable
electronic control systems
fEN ISO 13849-1, Safety of machinery. Safety related parts of control systems - part 1: general principles for
design
Modifications to the electronics of the Electronic-Key adapter and any other changes, especially mechanical
modifications and reworking, are not permissible and will result in the loss of the warranty and exclusion of
liability.
The Electronic-Key adapter must only be employed and used in accordance with
fthis manual and
fother documentation referred to in this manual.
The EKS Electronic-Key adapter is not a safety component in the sense of the machinery directive.
Without additional precautions the EKS Electronic-Key adapter must not be used to provide a safety function,
particularly if failure or malfunction of the unit could endanger the safety or health of people in the operating
area of a machine.
1.5 Obligations on the operating organization
The manufacturer and the organization operating the higher-level overall system, e.g. a machine installation, are
responsible for the observance of national and international safety and accident prevention regulations
applicable in the specific case.
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Manual EKS Electronic-Key Adapter Profibus-DP
2 Safety precautions
Warning!
The EKS Electronic-Key adapter is not a safety component in the sense of the machinery directive.
Without additional precautions the EKS Electronic-Key adapter must not be used to provide a safety
function, particularly if failure or malfunction of the unit could endanger the safety or health of persons
in the operating area of a machine. On this topic pay particular attention to the sections Correct use
(see section 1.4) and Electrical connection (see section 6).
Warning!
Installation and electrical connection must be performed only by authorized personnel who are familiar
with the applicable regulations on accident prevention and have read and understood this manual.
Furthermore, the mounting and electrical connection of the version EKS FSA are only allowed to be
performed by personnel familiar with handling safety components.
Caution!
Modifications to the electronics of the Electronic-Key adapter and any other changes, especially
mechanical modifications and reworking, are not permissible and will result in the loss of the warranty.
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Manual EKS Electronic-Key Adapter Profibus-DP
3 Function
3.1 Functional description
3.1.1 Common functions of EKS Standard and version EKS FSA
The EKS is used for access control and monitoring on controllers or parts of controllers for machine
installations.
Instead of passwords, coded Electronic-Keys are assigned. In this way unauthorized access to control and
display systems is prevented to the greatest possible extent.
The EKS uses a non-contact, inductive read/write identification system.
It comprises:
fElectronic-Key
fElectronic-Key adapter
The user is responsible for organizing the programming of the application, integration in an overall system and
the assignment and use of the freely programmable memory in the Electronic-Key.
Information!
For easier organization and management of your Electronic-Keys and the data they contain,
EUCHNER also offers the Electronic Key Manager (EKM) software. To enter data in the EKM
software, an Electronic-Key adapter with serial interface or USB interface must be in operation
on the PC.
Signal
Processing Micro
Controller 1 Micro Controller 2
12 MHz
Siemens
SPC3
48 MHz
Electronic-
Key
DC 24 V /
DC 5 V
RS485
Power Supply
DC 24 V
Profibus-DP
Connection
Figure 1: Block diagram EKS
The Electronic-Key adapter is a read/write system with integrated evaluation electronics and interface.
Due to the transfer of data without using any contacts, from the access side the Electronic-Key adapter has the
high degree of protection of IP 67, 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. The
Electronic-Key adapter is fastened by means of screw clamp elements from the rear side of the panel in order to
exclude unauthorized manipulation from the operator side.
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Manual EKS Electronic-Key Adapter Profibus-DP
The connection to the system is made using the integrated Profibus-DP interface. The Electronic-Key adapter is
connected to the field bus as a subscriber (DP slave) using a standard Profibus cable. The Electronic-Key
adapter can thus also be used remotely from the controller, e.g. at assembly workstations.
Setup and system integration can be realized very straightforwardly and quickly on the Electronic-Key adapter
with Profibus-DP interface. The bus address is simply set at the Electronic-Key adapter and the device data file
(GSD file) loaded into the bus master. The transmission protocol complies with Profibus-DP according to
DIN EN 50170. The system automatically synchronizes itself to the data transfer rate of the bus master. The
data is available in the input area of the bus master immediately after connection.
Two transfer messages are supported based on the Profibus-DP SRD and SND transfer services:
fProgram (write) Electronic-Key read/write
fRead Electronic-Key
The current state of the Electronic-Key adapter is displayed using a 3-color LED. If an error is detected when
the Electronic-Key is written or read (e.g. due to premature removal of the key from the Electronic-Key adapter
or a faulty key), the LED flashes red for approx. 5 s. After this, the LED is illuminated green again and the
Electronic-Key adapter is again ready for use.
The Electronic-Keys are tag-shaped. The complete transponder without batteries with memory chip and
antenna is integrated into the Electronic-Key.
For operation, the Electronic-Key is inserted in the Electronic-Key adapter and is held in place by a spring clip.
The power supply for the transponder and the data are transferred without using any contacts between the
Electronic-Key adapter and Electronic-Key.
Figure 2: Cut-away illustration of Electronic-Key adapter with Electronic-Key inserted
The data carrier in the Electronic-Key is equipped with a combined memory:
f116 bytes E²PROM (programmable) plus 8 bytes ROM (serial number)
On Electronic-Keys read/write with 116 bytes, the memory is organized in 4-byte blocks. This means a multiple
of 4-byte sized blocks must always be written.
3.1.2 Additional functions of the version EKS FSA
The version EKS FSA has two additional semiconductor relay outputs (LA1/LA2 and optionally LB1/LB2) that
are switched off as long as there is no Electronic-Key in the Electronic-Key adapter or if it is not possible to read
the Electronic-Key.
The semiconductor relay outputs are electrically isolated from the device electronics and from each other. Either
AC or DC can be switched.
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Manual EKS Electronic-Key Adapter Profibus-DP
Each of the outputs is operated with diversity by a dedicated processor that switches off the outputs on removal
of the Electronic-Key (see Figure Block diagram EKS FSA).
Figure 3: Block diagram EKS FSA
By separately evaluating channel LA and channel LB, the EKS FSA device can be used in conjunction with a
safe evaluation in safety-related applications. Integrated voltage monitoring switches off the switching contacts
LA and LB if the power supply is outside the permitted tolerance (see section 4.2).
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Manual EKS Electronic-Key Adapter Profibus-DP
4 Technical Data
4.1 Dimension drawing of Electronic-Key adapter
For installation in a control panel you must provide a cut-out 33 mm x 68 mm according to DIN 43700.
4.1.1 Version EKS-A-IDX-G01-ST09/03 with Profibus-DP interface
83
8
75
40
32
LED
76
67
max. 4mm
1,5 sealing
60,7
M4
70,5
51,5 8,5
32
DIP switch -
68
33
Front panel cut out
acc. to DIN 43700
-
4.1.2 Version EKS-A-IDXA-G01-ST09/03/04 (EKS FSA) with Profibus-DP interface
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Manual EKS Electronic-Key Adapter Profibus-DP
4.2 Technical data, Electronic-Key adapter
Attention!
All the electrical connections must either be isolated from the mains supply by a safety transformer
according to EN IEC 61558-2-6 with limited output voltage in the event of a fault, or by other equivalent
isolation measures.
General parameters Value Unit
min. typ. max.
Housing Plastic (PA 6 GF30 gray)
Degree of protection according to EN 60529 IP 67 in installed condition
Ambient temperature at UB = 24 V DC 0 + 55 °C
Mounting cut-out acc. to DIN 43700 33 x 68 mm
Connection for power supply Plug-in screw terminal, 3-pole,
max. conductor cross-section 1.5 mm², tightening torque
0.22 Nm
Operating voltage UB
(regulated, residual ripple < 5 %) 20 24 28 DC V
Current consumption 150 mA
Interface, data transfer
Interface to host control RS485
(address selectable via DIP switch)
Address range 0 ... 126
Transfer protocol Profibus-DP according to EN 50170
Data transfer rate 9.6/19.2/45.45/93.75/187.5/500 kbps
1.5/3/6/12 Mbps
Connection for Profibus-DP Sub-D 9-pin
Cable length max. 100 ... 1200
according to Profibus-DP, depending on data transfer rate m
LED display Green: "Ready" (in operation)
Yellow: "Electronic key active" *
Red: "Error"
Parameters for the outputs LA and LB (version EKS FSA only)
Power supply for load U (LA, LB) 24 30 V
Switching current per output 1 50 mA
Number of actuations of the overload
protection 100
Output voltage high for U (LA, LB) U x 0.9 U V
Resistance in switched-on state 35 Ohm
Capacitance per output 2 nF
Additional capacitive load per output 1 µF
Utilization category according to AC-12
EN IEC 60947-5-2 AC-15
DC-12
DC-13
50 mA / 24 V
Difference time between the outputs**
(LB first) 200 ms
Connection screw terminals, 2 x 2-pole 0.14 1.5 mm²
* The LED lights up yellow if there is a functional Electronic-Key in the Electronic-Key adapter.
** If access on the Profibus interface takes place during the insertion or removal of the Electronic-Key,
the difference time can be more than 200 ms.
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Manual EKS Electronic-Key Adapter Profibus-DP
4.3 Pin assignment
4.3.1 Socket, Profibus-DP
PIN Designation Function (according to EIA RS-485)
1 Not used -
2 Not used -
1
9
5
6
3 RxD/TxD-P Transmit/receive data P, B-wire
4 CNTR-P Direction detection signal for repeater
5 DGND Data ground
6 VP Power supply DC +5 V for termination resistor plug
SUB-D socket 7 Not used -
9-pin 8 RxD/TxD-N Transmit/receive data N, A-wire
9 Not used -
Housing Function earth Electrically connected to the housing
4.3.2 Plug-in screw terminals for power supply
Information!
The coded plug for connection of the power supply is included with the Electronic-Key adapter.
123
PIN Designation Function
1 UB Power supply DC + 24 V
2 0V Power supply DC 0 V
Coded plug, 3-pin
with screw terminals
Cond. cross-section 0.14 ... 1.5 mm² 3 Function earth Electrically connected to the housing
Tightening torque 0.22 Nm
4.3.3 Plug-in screw terminals for outputs LA1/LA2 and LB1/LB2 (EKS FSA only)
Information!
The coded plug for connection of the outputs is included with the Electronic-Key adapter.
Channel Pin Function
1 Normally open contact
channel LA
LA
2
Coded plug 2 x 2-pin 1
with screw terminals Normally open contact
channel LB
LB
Cond. cross-section 0.14 … 1.5 mm²
Tightening torque 0.22 Nm 2
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Manual EKS Electronic-Key Adapter Profibus-DP
4.4 DIP switch settings
The device address 0...126 (decimal) can be set using the DIP switches S1 to S7. The device address is given
by the sum of the address values on each DIP switch.
Write protection can be enabled using DIP switch S8. In this way the writing of data to the Electronic-Key
read/write is prevented.
Information!
The settings are only applied when the power supply is switched on.
DIP switches, 8-pole:
DIP
switch Factory setting
Functions address 3
S8 ON = write protection for Electronic-Key read/write OFF
S7 ON = address 64 decimal OFF
S6 ON = address 32 decimal OFF
S5 ON = address 16 decimal OFF
S4 ON = address 8 decimal OFF
S3 ON = address 4 decimal OFF
S2 ON = address 2 decimal ON
S1 ON = address 1 decimal ON
The device addresses 0 to 126 (decimal) are set using the following scheme:
12345678
ON
Device LSB MSB
address S1 S2 S3 S4 S5 S6 S7 S8
0 OFF OFF OFF OFF OFF OFF OFF
1 ON OFF OFF OFF OFF OFF OFF
2 OFF ON OFF OFF OFF OFF OFF
3 ON ON OFF OFF OFF OFF OFF
:
32 OFF OFF OFF OFF OFF ON OFF
:
126 OFF ON ON ON ON ON ON
Write
protection
for
Electronic-
Key
read/write
Information!
The address 126 is only intended to be used for setup purposes.
4.5 LED indicator
The Electronic-Key adapter operating states are indicated using a 3-color LED on the front.
Illumination of the LED in any color indicates the presence of the operating voltage.
Color Operating state Description
General bus error.
Red Fault
No communication with the bus master or error when the Electronic-Key is written or
read (e.g. due to premature removal of the key from the Electronic-Key adapter or a
faulty key).
The LED then flashes red for approx. 5 s. After this, the LED is illuminated green again
and the Electronic-Key adapter is again ready for use.
Green Ready
Communication with the bus master without Electronic-Key, Electronic-Key adapter
ready.
Yellow Electronic-Key active
Communication with the bus master with Electronic-Key. There is an Electronic-Key in
the Electronic-Key adapter and it has been detected.
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Manual EKS Electronic-Key Adapter Profibus-DP
4.6 Profibus-DP
Specification for bus cables
A cable specified as cable type A according to EN 50170 must be used for the bus connection:
Parameter Cable type A Unit
Cable structure Two core twisted, screened
Effective capacitance pF/m
≤30
Characteristic impedance 135 ... 165 (at a frequency of 3 ... 20 MHz) Ω
Loop impedance ≤ 110 Ω/km
Core diameter > 0.64 mm
2
Core cross-section > 0.34 mm
4.6.1 Bus connection
On Profibus-DP every bus segment must be terminated at the start and end with a resistor.
Information!
The Electronic-Key adapter does not contain an internal switchable bus termination resistor!
If the Electronic-Key adapter is the last device on the cable, a bus plug with switchable bus termination
resistor must be used.
Information!
To enable subscribers to be coupled and uncoupled to and from the Profibus as required while it is in
operation, active RS485 termination elements are available. With the active RS485 termination
element, the termination resistor is permanently supplied with power separately from the other
peripheral subscribers. As it is operated independently of the bus subscribers, it can be coupled and
uncoupled without interaction.
4.6.2 Permissible cable lengths
The permissible cable length in a bus segment is dependent on the cable type, the data transfer rate, the
number of bus subscribers and external interference.
The table gives the maximum cable length for a bus segment as a function of the data transfer rate with the
maximum number of subscribers of 32:
Parameter Value Unit
Data transfer
rate 3000/
93.75 187.5 500 1500 kbps
6000/12000
Cable type A 1200 1000 400 200 100 m
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Manual EKS Electronic-Key Adapter Profibus-DP
5 Mounting
Warning!
Mounting must be performed only by authorized personnel.
Warning!
To achieve the degree of protection IP 67, it is necessary to install the Electronic-Key adapter in a
clean, flat metal plate at least 2 mm thick and to tighten the screws with a tightening torque of
0.25 ... 0.35 Nm.
A suitable strain relief must be provided for the connection cables in order to avoid damage to the
connection sockets or malfunctions.
The Electronic-Key adapter is intended for mounting in control panels with a cut-out measuring 33 mm x 68 mm
according to DIN 43700 (see section 4.1). The device is fastened using screw clamp elements from the rear
side of the panel.
Information!
The screw clamp elements for front panel mounting are included with the Electronic-Key adapter.
1. Insert Electronic-Key adapter, with seal already bonded in place, into the mounting cut-out from the front.
2. Insert screw clamp elements in the housing of the Electronic-Key adapter from the side up to the stop and
tighten with 0.25 …0.35 Nm.
Warning!
The device may be damaged if the tightening torque applied exceeds 0.35 Nm.
3. After mounting, again check the Electronic-Key adapter for firm seating and correct sealing of the front
panel.
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Manual EKS Electronic-Key Adapter Profibus-DP
6 Electrical connection
Electrical connection may only be performed by authorized personnel trained in EMC and with the
device and wiring isolated.
For use and operation as per the requirements, a power supply for use in class 2 circuits must
be used.
The Electronic-Key adapter is only allowed to be connected if it is electrically isolated.
Otherwise the Electronic-Key adapter may be damaged.
If connected incorrectly, the Electronic-Key adapter may be damaged.
Observe electrical characteristics and the pin assignment (see section
4.2 Technical data, Electronic-
Key adapter).
All the electrical connections must either be isolated from the mains supply by a safety transformer
according to IEC/EN 61558-2-6 with limited output voltage in the event of a fault, or by other equivalent
isolation measures.
When installing connections, the operating organization must ensure compliance with the EMC safety
requirements in accordance with EN 55011 and EN 61000-6-2.
The electrical connection must be made according to EN 50170 or the technical guidelines in the User
and Installation Guide Profibus-DP from the Profibus User Organization.
The equipotential bonding system of the machine installation must comply with EN 60204-1, section 8,
Equipotential bonding.
Do not lay connection cables in the immediate vicinity of sources of interference.
6.1 Connection of Profibus-DP
(For information on pin assignment see section 4.3.1 Socket, Profibus-DP)
Information!
In general spurs are to be avoided!
The ends of the cable must be terminated with a resistor.
Information!
The Electronic-Key adapter does not contain an internal switchable bus termination resistor!
If the Electronic-Key adapter is the last device on the cable, a bus plug with switchable bus termination
resistor must be used.
It is imperative that the following points are observed:
fA cable specified as cable type A according to EN 50170 must be used for the bus connection.
fOnly use bus cables with plugs according to EN 50170.
fWhen assembling cables, it is imperative that the assembly instructions from the plug manufacturer are
observed.
fThe bus connection plug must be inserted and the screw thread tightened. Only in this way is it ensured
that the function earth between cable screen and housing of the Electronic-Key adapter is connected.
f
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Manual EKS Electronic-Key Adapter Profibus-DP
6.2 Connection of power supply
(For information on pin assignment see section 4.3.2 Plug-in screw terminals for power supply)
It is imperative that the following points are observed:
fThe connections must be made as appropriate to maintain EMC performance.
fA power supply of suitable EMC performance must be used for the power supply.
fConductor cross-section maximum 1.5 mm².
fTighten the terminal screws on the plug to 0.22 Nm.
6.3 Connection of function earth
The function earth is connected via terminal 3 on the plug-in screw terminals for the power supply. This
connection is electrically connected internally to the housing of the Electronic-Key adapter.
Information!
The function earth must be connected to PE!
6.4 Connection of the switched outputs (for EKS FSA only)
Warning!
Incorrect connection or errors in the safety-related integration of the EKS FSA can lead to fatal injury.
For this reason, observe the following safety aspects:
fIt is not possible to generate a safe signal by using only the switched outputs LA1/LA2 and
LB1/LB2. Safe, downstream evaluation is always necessary (e. g. using a safety relay). Use of the
switched output LB1/LB2 as an alternative to the data line is optional.
fThe safe evaluation must always be dual-channel. For this purpose, there are two alternatives:
1. Evaluation of output LA1/LA2 as channel LA together with an evaluation of the data line as
channel LB (recommended)
2. Evaluation of output LA1/LA2 as channel LA together with the output LB1/LB2 as channel LB
fIntegrate the EKS FSA as defined in the following connection examples from EUCHNER.
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Manual EKS Electronic-Key Adapter Profibus-DP
6.4.1 Connection example with enabling switch
Figure 4: Principle of operation (illustration with selected operating mode and all parts in actuated position)
6.4.1.1 Description of the application example with enabling switch
The danger area on a machine is secured with a fence. To make set-up work on the machine possible with the
guard open, an EKS FSA system is integrated in conjunction with a control system, an enabling switch and a
safety relay. The safety relay must comply with the following requirements:
fDetection of short-circuits and earth faults. A short-circuit can be detected in the safety path in the circuit
described due to the fact that both the positive path and earth path of the safety relay are switched. In this
case, the safety relay deactivates its safety outputs.
fSimultaneity monitoring: the safety relay must detect whether the safety inputs are switched practically
simultaneously. If this is not the case, the safety outputs are not switched and the unit switches to fault
state. A renewed start is possible only after the enabling switch has been released and then operated again.
The switching contact LA1/LA2 is closed after insertion of the Electronic-Key. The EKS FSA is coupled with a
control system. After the insertion of the Electronic-Key, the control system checks whether the key is
authorized for work in the selected operating mode. If this is not the case, the operating mode cannot be set. If
suitable access rights are available, the control system gives the instruction to the switching contact A100.0 to
close.
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Manual EKS Electronic-Key Adapter Profibus-DP
The switching contact LA1/LA2, in series with a switching contact on the enabling switch, is connected to the
first input on the safety relay. The switching contact A100.0 is connected to the second input on the safety relay
in series with the second switching contact on the enabling switch. The result is that these inputs on the safety
relay are only enabled if
fthe EKS-FSA (switching contact LA1/LA2) and
fthe control system (switching contact A100.0) issue the related release and
fthe enabling switch is actuated.
The output contacts on the safety relay are only released after actuation of the enabling switch.
The safety relay is de-energized without a time delay (stop category 0) and the machine movement is stopped if
fthe Electronic-Key is removed or
fthe enabling switch is released or
fthe machine control system cancels the release (contact A100.0 is opened).
Note: The control system output A100.0 is only allowed to be set if
fthe related Electronic-Key is inserted and
fa suitable operating mode is selected.
6.4.1.2 Feedback loop
The safety relay can be started only with the feedback loop closed. A welded contactor contact in the enable
path will thus be detected when a start request is made and a start is then prevented. The power contactor must
have positively driven contacts.
6.4.1.3 Start
The safety relay start takes place after release by the EKS FSA and by the control system and after operation of
the enabling switch.
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