Beckhoff ELX3351 Operating Manual
Operating manual
ELX3351
1-channel analog input terminal for strain gauge, 16 bit, Ex i
Version:
Date:
1.3.1
2019-01-15
Table of contents
Table of contents
1 Foreword ....................................................................................................................................................5
1.1 Notes on the documentation........................................................................................................... 5
1.2 Safety instructions .......................................................................................................................... 6
1.3 Documentation Issue Status........................................................................................................... 7
1.4 Marking of ELX terminals................................................................................................................ 8
2 Product overview.....................................................................................................................................11
2.1 ELX3351 - Introduction ................................................................................................................. 11
2.2 Technical data .............................................................................................................................. 12
2.3 Intended use ................................................................................................................................. 13
3 Mounting and wiring ...............................................................................................................................14
3.1 Special conditions of use for ELX terminals ................................................................................. 14
3.2 Installation notes for ELX terminals .............................................................................................. 14
3.3 Arrangement of ELX terminals within a bus terminal block .......................................................... 16
3.4 Installation position and minimum distances ................................................................................ 19
3.5 Installation of ELX terminals on mounting rails............................................................................. 20
3.6 Connection.................................................................................................................................... 21
3.6.1 Connection system...........................................................................................................21
3.6.2 Wiring...............................................................................................................................22
3.6.3 Proper line connection .....................................................................................................23
3.6.4 Shielding and potential separation...................................................................................23
3.6.5 ELX3351 - Contact assignment .......................................................................................24
4 Basic function principles........................................................................................................................26
4.1 EtherCAT basics........................................................................................................................... 26
4.2 Basic principles of strain gauge technology.................................................................................. 26
5 Parameterization and programming ......................................................................................................33
5.1 Basics of the measurement functions........................................................................................... 33
5.1.1 General notes ..................................................................................................................33
5.1.2 Block diagram ..................................................................................................................35
5.1.3 Software filter ...................................................................................................................35
5.1.4 Dynamic filter ...................................................................................................................37
5.1.5 Calculating the weight......................................................................................................38
5.2 Application notes .......................................................................................................................... 38
5.2.1 Wiring fail indication .........................................................................................................38
5.2.2 InputFreeze......................................................................................................................38
5.2.3 Gravity adaptation............................................................................................................39
5.2.4 Idling recognition..............................................................................................................40
5.2.5 Official calibration capability.............................................................................................40
5.3 Calibration and compensation ...................................................................................................... 40
5.3.1 Sensor calibration ............................................................................................................41
5.3.2 Self-calibration .................................................................................................................43
5.3.3 Taring...............................................................................................................................44
5.3.4 Overview of commands....................................................................................................44
5.4 Notices on analog specifications .................................................................................................. 45
5.4.1 Full scale value (FSV)......................................................................................................45
5.4.2 Measuring error/ measurement deviation ........................................................................45
5.4.3 Temperature coefficient tK [ppm/K] .................................................................................46
5.4.4 Single-ended/differential typification ................................................................................47
ELX3351 3Version: 1.3.1
Table of contents
5.4.5 Common-mode voltage and reference ground (based on differential inputs)..................50
5.4.6 Dielectric strength ............................................................................................................50
5.4.7 Temporal aspects of analog/digital conversion................................................................51
5.5 Process data................................................................................................................................. 54
5.5.1 Selection of process data.................................................................................................54
5.5.2 Default process image .....................................................................................................55
5.5.3 Variants Predefined PDO.................................................................................................57
5.5.4 Sync Manager..................................................................................................................58
5.6 ELX3351 - Object description and parameterization .................................................................... 59
5.6.1 Restore object..................................................................................................................59
5.6.2 Configuration data............................................................................................................60
5.6.3 Command object..............................................................................................................61
5.6.4 Input data .........................................................................................................................61
5.6.5 Output data ......................................................................................................................61
5.6.6 Information / diagnostic data............................................................................................62
5.6.7 Standard objects ..............................................................................................................62
6 Appendix ..................................................................................................................................................68
6.1 EtherCAT AL Status Codes .......................................................................................................... 68
6.2 UL notice....................................................................................................................................... 68
6.3 Support and Service ..................................................................................................................... 69
ELX33514 Version: 1.3.1
Foreword
1 Foreword
1.1 Notes on the documentation
Intended audience
This description is only intended for the use of trained specialists in control and automation engineering who
are familiar with the applicable national standards.
It is essential that the documentation and the following notes and explanations are followed when installing
and commissioning these components.
It is the duty of the technical personnel to use the documentation published at the respective time of each
installation and commissioning.
The responsible staff must ensure that the application or use of the products described satisfy all the
requirements for safety, including all the relevant laws, regulations, guidelines and standards.
Disclaimer
The documentation has been prepared with care. The products described are, however, constantly under
development.
We reserve the right to revise and change the documentation at any time and without prior announcement.
No claims for the modification of products that have already been supplied may be made on the basis of the
data, diagrams and descriptions in this documentation.
Trademarks
Beckhoff®, TwinCAT®, EtherCAT®, EtherCATP®, SafetyoverEtherCAT®, TwinSAFE®, XFC® and XTS® are
registered trademarks of and licensed by Beckhoff Automation GmbH.
Other designations used in this publication may be trademarks whose use by third parties for their own
purposes could violate the rights of the owners.
Patent Pending
The EtherCAT Technology is covered, including but not limited to the following patent applications and
patents: EP1590927, EP1789857, DE102004044764, DE102007017835 with corresponding applications or
registrations in various other countries.
The TwinCAT Technology is covered, including but not limited to the following patent applications and
patents: EP0851348, US6167425 with corresponding applications or registrations in various other countries.
EtherCAT® is registered trademark and patented technology, licensed by Beckhoff Automation GmbH,
Germany.
Copyright
© Beckhoff Automation GmbH & Co. KG, Germany.
The reproduction, distribution and utilization of this document as well as the communication of its contents to
others without express authorization are prohibited.
Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a
patent, utility model or design.
ELX3351 5Version: 1.3.1
Foreword
1.2 Safety instructions
Safety regulations
Please note the following safety instructions and explanations!
Product-specific safety instructions can be found on following pages or in the areas mounting, wiring,
commissioning etc.
Exclusion of liability
All the components are supplied in particular hardware and software configurations appropriate for the
application. Modifications to hardware or software configurations other than those described in the
documentation are not permitted, and nullify the liability of Beckhoff Automation GmbH & Co. KG.
Personnel qualification
This description is only intended for trained specialists in control, automation and drive engineering who are
familiar with the applicable national standards.
Description of instructions
In this documentation the following instructions are used.
These instructions must be read carefully and followed without fail!
DANGER
WARNING
CAUTION
Attention
Note
Serious risk of injury!
Failure to follow this safety instruction directly endangers the life and health of persons.
Risk of injury!
Failure to follow this safety instruction endangers the life and health of persons.
Personal injuries!
Failure to follow this safety instruction can lead to injuries to persons.
Damage to environment/equipment or data loss
Failure to follow this instruction can lead to environmental damage, equipment damage or
data loss.
Tip or pointer
This symbol indicates information that contributes to better understanding.
ELX33516 Version: 1.3.1
1.3 Documentation Issue Status
Version Comment
1.3.1 • Minor corrections at chapter Basic function principles and Parameterization and
programming during translation
1.3.0 • Chapter Basic function principles added
• Chapter Parameterization and programming added
1.2.0 • Connection extended with sensor display
• Chapter Configuration of ELX terminals in Bus Terminal block updated
• Chapter Identification of ELX terminals updated
• Technical data updated
1.1.0 • Chapter Configuration of ELX terminals in Bus Terminal block updated
1.0.1 • Layout updated
1.0 • Technical data updated
• Chapter Mounting and wiring updated
0.2 • Technical data updated
• Chapter Mounting and wiring updated
0.1 • First preliminary version (for internal use only)
Foreword
ELX3351 7Version: 1.3.1
Foreword
1.4 Marking of ELX terminals
Name
An ELX terminal has a 15-digit technical designation, composed of
• family key
• type
• software variant
• revision
example family type software variant revision
ELX1052-0000-0000 ELX terminal 1052: two-channel digital input terminal
for NAMUR sensors, Ex i
ELX9650-0000-0000 ELX terminal 9650: power supply terminal 0000: basic type 0001
Notes
• The elements mentioned above result in the technical designation. ELX1052-0000-0001 is used in
the example below.
• Of these, ELX1052-0000 is the order identifier, commonly called just ELX1052 in the "-0000" revision.
“-0001” is the EtherCAT revision.
• The order identifier is made up of
- family key (ELX)
- type (1052)
- software version (-0000)
• The Revision -0001 shows the technical progress, such as the extension of features with regard to the
EtherCAT communication, and is managed by Beckhoff.
In principle, a device with a higher revision can replace a device with a lower revision, unless specified
otherwise, e.g. in the documentation.
Associated and synonymous with each revision there is usually a description (ESI, EtherCAT Slave
Information) in the form of an XML file, which is available for download from the Beckhoff website.
The revision has been applied to the terminals on the outside, see ELX1052 with date code
3218FMFM, BTN 10000100 and Ex marking.
• The hyphen is omitted in the labeling on the side of the terminal. Example:
Name: ELX1052-0000
Label: ELX1052
• The type, software version and revision are read as decimal numbers, even if they are technically
saved in hexadecimal.
0000
0000: basic type 0001
Identification numbers
ELX terminals have two different identification numbers:
• date code (batch number)
• Beckhoff Traceability Number, or BTN for short (as a serial number it clearly identifies each terminal)
Datecode
The date code is an eight-digit number given by Beckhoff and printed on the ELX terminal. The date code
indicates the build version in the delivery state and thus identifies an entire production batch, but does not
distinguish between the terminals in a batch.
Structure of the date code: WWYYFFHH
WW - week of production (calendar week)
YY - year of production
FF - firmware version
HH - hardware version
ELX33518 Version: 1.3.1
Example with date code: 02180100:
02 - week of production 02
18 - year of production 2018
01 - firmware version 01
00 - hardware version 00
Beckhoff Traceability Number (BTN)
In addition, each ELX terminal has a unique Beckhoff Traceability Number (BTN).
Ex marking
The Ex marking can be found at the top left on the terminal:
II 3 (1) G Ex ec [ia Ga] IIC T4 Gc
II (1) D [Ex ia Da] IIIC
I (M1) [Ex ia Ma] I
IECEx BVS 18.0005X
BVS 18 ATEX E 005 X
Examples
Foreword
Fig.1: ELX1052-0000 with date code 32180000, BTN 10000100 and Ex marking
ELX3351 9Version: 1.3.1
Foreword
Fig.2: ELX9012 with date code 32180005 and Ex marking
ELX335110 Version: 1.3.1
2 Product overview
2.1 ELX3351 - Introduction
Product overview
Fig.3: 1-channel analog input terminal for strain gauge, 16 bit, Ex i
The analog ELX3351 input terminal enables direct connection of a resistor bridge or load cell from
hazardous areas, Zone 0/20 and 1/21. The terminal can be connected in 4- or 6-wire technology. The ratio
between the bridge voltage UD and the supply voltage UR is determined in 24-bit resolution, and the load
value is calculated as a process value. Apart from automatic self-calibration (can be deactivated), additional
functions such as Tara and Freeze as well as dynamic filters are integrated.
ELX3351 11Version: 1.3.1
Product overview
2.2 Technical data
Technical data ELX3351-0000
Sensor types resistor bridge, strain gauge
Number of inputs 1, for 1 resistor bridge in full bridge technology
Connection method 4-wire, 6-wire
Bridge input resistance 300Ω…1.5kΩ
Measuring range U
Measuring range U
D
REF
Internal resistance > 25kΩ (UR, differential), > 1MΩ (UD, differential)
Resolution 24Bit, 32bit presentation
Measuring error < ±0,5 % (relative to full scale value), self-calibration active
Input filter limit frequency typ. 3.6kHz (-3dB, low pass)
Conversion time typ. 1.6 ms
Filter 50Hz, configurable
Supply voltage electronics via E-Bus (5VDC) and Power Contacts (24V
Current consumption from E-Bus typ. 85mA
Power supply U
V
Current consumption power contacts min. 20mA, dependent on sensor
Special features self-calibration, dynamic filters, freeze
Bit width in the process image 32 bit
Electrical isolation 1500V (E-Bus/ field voltage)
Weight app. 60g
Permissible ambient temperature range
during operation
Permissible ambient temperature range
during storage
Permissible relative humidity 95%, no condensation
Permissible air pressure
(operation, storage, transport)
Dimensions (W x H x D) app. 15mm x 100mm x 70mm (width aligned: 12mm)
Mounting on 35mm mounting rail conforms to EN 60715
Vibration/ shock resistance conforms to EN60068-2-6/ EN60068-2-27
EMC immunity/ emission conforms to EN61000-6-2/ EN61000-6-4
Protect. class IP20
Permissible installation position
Approvals CE, ATEX, IECEx
max. -18…+18mV
max. -12…+12V
Ex, feeding by
DC
ELX9560)
up to 10VDC, dependent on sensor
-25°C ... + 60°C
-40°C ... + 85°C
800hPa to 1100hPa
(this corresponds to a height of approx. -690m to 2000m over
sea level assuming an international standard atmosphere)
See chapter Installation position and minimum distances [}19]
ELX335112 Version: 1.3.1
Technical data for explosion protection ELX3351-0000
Ex marking II 3 (1) G Ex ec [ia Ga] IIC T4 Gc
II (1) D [Ex ia Da] IIIC
I (M1) [Ex ia Ma] I
Certificate numbers IECEx BVS 18.0005X
BVS 18 ATEX E 005 X
Power supply Invariable in connection with ELX9560
Field interfaces UO = 11.76V
IO = 146mA
PO = 214mW
Characteristic curve: linear
Reactance (without
consideration of the
simultaneousness)
Ex ia I 20mH 40µF
Ex ia IIA 13.3mH 39µF
Ex ia IIB 6.6mH 9.9µF
Ex ia IIC 1.7mH 1.5µF
Ex ia IIIC 6.6mH 9.9µF
L
0
C
0
Product overview
2.3 Intended use
Endangering the safety of persons and equipment!
The ELX components may only be used for the purposes described below!
WARNING
Observe ATEX and IECEx!
The ELX components may only be used in accordance with the ATEX directive and the
CAUTION
The ELX terminals extend the field of application of the Beckhoff bus terminal system with functions for
integrating intrinsically safe field devices from hazardous areas. The intended field of application is data
acquisition and control tasks in discrete and process engineering automation, taking into account explosion
protection requirements.
The ELX terminals are protected by the type of protection "Increased safety" (Exe) according to
IEC60079-7 and must only be operated in hazardous areas of Zone2 or in non-hazardous areas.
The field interfaces of the ELX terminals achieve explosion protection through the type of protection "intrinsic
safety" (Exi) according to IEC60079-11. For this reason, only appropriately certified, intrinsically safe
devices may be connected to the ELX terminals. Observe the maximum permissible connection values for
voltages, currents and reactances. Any infringement can damage the ELX terminals and thus eliminate the
explosion protection.
IECEx scheme!
The ELX terminals are open, electrical equipment for installation in lockable cabinets, enclosures or
operating rooms. Make sure that access to the equipment is only possible for authorized personnel.
Ensure traceability!
The buyer has to ensure the traceability of the device via the Beckhoff Traceability Number
CAUTION
ELX3351 13Version: 1.3.1
(BTN) [}9].
Mounting and wiring
3 Mounting and wiring
3.1 Special conditions of use for ELX terminals
Observe the special conditions of use for the intended use of Beckhoff ELX
terminals in potentially explosive areas (ATEX directive 2014/34/EU)!
WARNING
• The certified components are to be installed in a suitable housing that guarantees an
ingress protection of at least IP54 in accordance with EN60079-0 and EN60529! The
prescribed environmental conditions during installation, operation and maintenance are
thereby to be taken into account! Inside the housing, pollution degree 1 and 2 are permissible.
• If the temperatures during rated operation are higher than 70°C at the feed-in points of
cables, lines or pipes, or higher than 80°C at the wire branching points, then cables
must be selected whose temperature data correspond to the actual measured temperature values!
• Observe the permissible ambient temperature range of -25 to +60°C of Beckhoff ELX
terminals!
• Measures must be taken to protect against the rated operating voltage being exceeded
by more than 40% due to short-term interference voltages! The power supply of the
ELX9560 power supply terminal must correspond to overvoltage categoryII according
to EN60664-1
• The individual terminals may only be unplugged or removed from the bus terminal system if all supply voltages have been switched off or if a non-explosive atmosphere is
ensured!
• The connections of the ELX9560 power supply terminal may only be connected or disconnected if all supply voltages have been switched off or if a non-explosive atmosphere is ensured!
• The fuses of the EL92xx power feed terminals may only be exchanged if all supply voltages have been switched off or if a non-explosive atmosphere is ensured!
• Address selectors and switches may only be adjusted if all supply voltages have been
switched off or if a non-explosive atmosphere is ensured!
3.2 Installation notes for ELX terminals
Storage, transport and mounting
• Transport and storage are permitted only in the original packaging!
Attention
WARNING
• Store in a dry place, free from vibrations.
• A brand new ELX terminal with a certified build version is delivered only in a sealed carton. Therefore, check that the carton and all seals are intact before unpacking.
• Do not use the ELX terminal if
- its packaging is damaged
- the terminal is visibly damaged or
- you cannot be sure of the origin of the terminal.
• ELX terminals with a damaged packaging seal are regarded as used.
Observe the accident prevention regulations
During mounting, commissioning, operation and maintenance, adhere to the safety regulations, accident prevention regulations and general technical rules applicable to your devices, machines and plants.
ELX335114 Version: 1.3.1
CAUTION
Attention
Attention
Attention
Mounting and wiring
Observe the erection regulations
Observe the applicable erection regulations.
Protect the terminals against electrostatic discharge (ESD)
Electronic components can be destroyed by electrostatic discharge. Therefore, take the
safety measures to protect against electrostatic discharge as described in DIN EN
61340-5-1 among others. In conjunction with this, ensure that the personnel and surroundings are suitably earthed.
Do not place terminals on E-bus contacts
Do not place the ELX terminals on the E-bus contacts located on the right-hand side. The
function of the E-bus contacts can be negatively affected by damage caused by this, e.g.
scratches.
Protect the terminals against dirt
To ensure the functionality of the ELX terminals they must be protected against dirt, especially on the contact points. For this reason use only clean tools and materials.
Handling
• It is forbidden to insert conductive or non-conductive objects of any kind into the interior
Attention
If an ELX terminal is defective or damaged it must be replaced by an equivalent terminal. Do not carry out
any repairs to the devices. For safety reasons repairs may only be carried out by the manufacturer.
of the housing (e.g. through the ventilation slots in the housing).
• Use only the openings provided in the housing front and appropriate tools to actuate the
spring-loaded terminal contacts on the front side for attaching connection cables to the
terminal; see chapter Wiring [}22].
• The opening of the housing, the removal of parts and any mechanical deformation or
machining of an ELX terminal are not permitted!
Contact marking and pin assignment
The colored inscription labels above the front connection contacts shown in the illustrations
Attention
in the introduction chapter are only examples and are not part of the scope of delivery!
A clear assignment of channel and terminal designation according to the chapter contact
assignment to the actual terminal point can be made via the lasered channel numbers 1 to
8 on the left above the respective terminal point as well as via the laser image.
Observe any possible polarity dependency of connected intrinsically safe circuits!
ELX3351 15Version: 1.3.1
Mounting and wiring
3.3 Arrangement of ELX terminals within a bus terminal block
Observe the following instructions for the arrangement of ELX terminals!
• ELX signal terminals must always be installed behind an ELX9560 power supply termi-
WARNING
Examples for the arrangement of ELX terminals
nal, without exception!
• Only signal terminals of the ELX series may be installed behind an ELX9560 power
supply terminal!
• Multiple ELX9560 power supply terminals may be set in one terminal block as long as
one ELX9410 is placed before each additional ELX9560!
• An ELX9410 power supply terminal must not be mounted to the right of an ELX9560
nor to the left of any ELX signal terminal!
• The last terminal of each ELX segment is to be covered by an ELX9012 bus end cover,
unless two ELX9410 power supply terminals are installed in direct succession for continuing the same terminal segment with standard Beckhoff EtherCAT terminals (e.g. EL/
ES/EK)!
Fig.4: Valid arrangement of the ELX terminals (right terminal block).
Fig.5: Valid arrangement - terminals that do not belong to the ELX series are set before and after the ELX
terminal segment. The separation is realized by the ELX9560 at the beginning of the ELX terminal segment
and two ELX9410 at the end of the ELX terminal segment.
Fig.6: Valid arrangement - multiple power supplies by ELX9560, each with an upstream ELX9410.
ELX335116 Version: 1.3.1
Fig.7: Valid arrangement - ELX9410 in front of an ELX9560 power supply terminal.
Mounting and wiring
Fig.8: Invalid arrangement - missing ELX9560 power supply terminal.
Fig.9: Invalid arrangement - terminal that does not belong to the ELX series within the ELX terminal
segment.
Fig.10: Invalid arrangement - second ELX9560 power supply terminal within the ELX terminal segment
without an upstream ELX9410.
ELX3351 17Version: 1.3.1
Mounting and wiring
Fig.11: Invalid arrangement - missing ELX9012 bus end cover.
Observe the maximum output current of the ELX9560
When configuring the ELX terminal segment, please note the maximum available output
Attention
current of the ELX9560 power supply terminal in accordance with the specified technical
data.
If required, an additional power supply terminal ELX9560 with an upstream ELX9410 connected (see mounting examples) must be installed or a completely new terminal block must
be assembled.
ELX335118 Version: 1.3.1
Mounting and wiring
3.4 Installation position and minimum distances
Installation position
For the prescribed installation position the mounting rail is installed horizontally and the mating surfaces of
the ELX terminals point toward the front (see illustration below). The terminals are ventilated from below,
which enables optimum cooling of the electronics through convection. The direction indication “down”
corresponds to the direction of positive acceleration due to gravity.
Minimum distances
Observe the following minimum distances to ensure optimum convection cooling:
• above and below the ELX terminals: 35mm (required!)
• besides the bus terminal block: 20mm (recommended)
Fig.12: Installation position and minimum distances
Observe the minimum separation distances according to IEC 60079-14!
Observe the prescribed minimum separation distances between intrinsically safe and non-
WARNING
ELX3351 19Version: 1.3.1
intrinsically safe circuits according to IEC 60079-14.
Mounting and wiring
3.5 Installation of ELX terminals on mounting rails
Risk of electric shock and damage of device!
Bring the bus terminal system into a safe, powered down state before starting installation,
WARNING
CAUTION
Assembly
disassembly or wiring of the bus terminals!
Danger of injury due to power contacts!
For your own protection, pay attention to careful and careful handling of the ELX terminals.
In particular, the left side mounted, sharp-edged blade contacts pose a potential risk of injury.
Fig.13: Attaching on mounting rail
The bus coupler and bus terminals are attached to commercially available 35mm mounting rails (DIN rails
according to EN60715) by applying slight pressure:
1. First attach the fieldbus coupler to the mounting rail.
2. The bus terminals are now attached on the right-hand side of the fieldbus coupler. Join the components with tongue and groove and push the terminals against the mounting rail, until the lock clicks
onto the mounting rail.
If the terminals are clipped onto the mounting rail first and then pushed together without tongue and
groove, the connection will not be operational! When correctly assembled, no significant gap should
be visible between the housings.
Fixing of mounting rails
The locking mechanism of the terminals and couplers extends to the profile of the mounting
Note
rail. At the installation, the locking mechanism of the components must not come into conflict with the fixing bolts of the mounting rail. To mount the mounting rails with a height of
7.5mm under the terminals and couplers, you should use flat mounting connections (e.g.
countersunk screws or blind rivets).
ELX335120 Version: 1.3.1
Mounting and wiring
Disassembly
Fig.14: Disassembling of terminal
Each terminal is secured by a lock on the mounting rail, which must be released for disassembly:
1. Pull the terminal by its orange-colored lugs approximately 1cm away from the mounting rail. In doing
so for this terminal the mounting rail lock is released automatically and you can pull the terminal out of
the bus terminal block easily without excessive force.
2. Grasp the released terminal with thumb and index finger simultaneous at the upper and lower grooved
housing surfaces and pull the terminal out of the bus terminal block.
Connections within a bus terminal block
The electric connections between the Bus Coupler and the Bus Terminals are automatically realized by
joining the components:
• The six spring contacts of the E-Bus deal with the transfer of the data and the supply of the Bus
Terminal electronics.
• The power contacts deal with the supply for the field electronics and thus represent a supply rail within
the bus terminal block.
The power contacts of the ELX terminals are supplied by the ELX9560 power terminal. This interrupts
the power contacts and thus represents the beginning of a new supply rail.
Power Contacts
During the design of a bus terminal block, the pin assignment of the individual Bus Termi-
Note
nals must be taken account of, since some types (e.g. analog Bus Terminals or digital 4channel Bus Terminals) do not or not fully loop through the power contacts.
3.6 Connection
3.6.1 Connection system
Risk of electric shock and damage of device!
Bring the bus terminal system into a safe, powered down state before starting installation,
WARNING
ELX3351 21Version: 1.3.1
disassembly or wiring of the bus terminals!
Mounting and wiring
Overview
The terminals of ELXxxxx series with standard wiring include electronics and connection level in a single
enclosure.
Standard wiring (ELXxxxx)
Fig.15: Standard wiring
The terminals of ELXxxxx series feature integrated screwless spring force technology for fast and simple
assembly.
Ultrasonically "bonded" (ultrasonically welded) conductors
Ultrasonically “bonded" conductors
It is also possible to connect the Standard Terminals with ultrasonically "bonded" (ultrasoni-
Note
cally welded) conductors. In this case, please note the tables concerning the wire-size
width below!
3.6.2 Wiring
Risk of electric shock and damage of device!
Bring the bus terminal system into a safe, powered down state before starting installation,
WARNING
Terminals for standard wiring ELXxxxx
disassembly or wiring of the Bus Terminals!
Fig.16: Connecting a cable on a terminal point
ELX335122 Version: 1.3.1
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