Beckhoff ELX3312 User manual

Operating manual | EN
ELX3312 and ELX3314
Two and four channel analog input terminals for
thermocouples, 16 bit, Ex i
2021-08-12 | Version: 1.3.0

Table of contents
ELX3312 and ELX3314 3Version: 1.3.0
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.....................................................................................................................................12
2.1 ELX3312 - Introduction....................................................................................................................12
2.2 ELX3314 - Introduction....................................................................................................................13
2.3 Technical data .................................................................................................................................14
2.4 Intended use....................................................................................................................................16
3 Mounting and wiring................................................................................................................................17
3.1 Special conditions of use for ELX terminals ....................................................................................17
3.2 Installation notes for ELX terminals .................................................................................................17
3.3 Arrangement of ELX terminals within a bus terminal block .............................................................19
3.4 Installation position and minimum distances ...................................................................................22
3.5 Installation of ELX terminals on mounting rails................................................................................23
3.6 Connection ......................................................................................................................................25
3.6.1 Connection system .......................................................................................................... 25
3.6.2 Wiring............................................................................................................................... 26
3.6.3 Proper line connection ..................................................................................................... 27
3.6.4 Shielding and potential separation................................................................................... 27
3.6.5 ELX3312 - Contact assignment ....................................................................................... 28
3.6.6 ELX3314 - Contact assignment ....................................................................................... 30
3.7 Disposal...........................................................................................................................................31
4 Basic function principles........................................................................................................................32
4.1 EtherCAT basics..............................................................................................................................32
4.2 Notices on analog specifications .....................................................................................................32
4.2.1 Full scale value (FSV)...................................................................................................... 32
4.2.2 Measuring error/ measurement deviation ........................................................................ 32
4.2.3 Temperature coefficient tK [ppm/K] ................................................................................. 33
4.2.4 Single-ended/differential typification ................................................................................ 34
4.2.5 Common-mode voltage and reference ground (based on differential inputs).................. 37
4.2.6 Dielectric strength ............................................................................................................ 37
4.2.7 Temporal aspects of analog/digital conversion................................................................ 38
4.3 Basics of thermoelectricity and thermocouples ...............................................................................41
4.4 Measurement of thermocouples (with measurement uncertainties)................................................43
4.5 Use of grounded thermocouples .....................................................................................................55
5 Parameterization and programming ......................................................................................................56
5.1 Basics of the measurement functions..............................................................................................56
5.2 Data processing...............................................................................................................................56
5.3 Settings............................................................................................................................................57
5.3.1 Presentation, index 0x80n0:02 ........................................................................................ 57
5.3.2 Siemens bits, index 0x80n0:05........................................................................................ 58

Table of contents
ELX3312 and ELX33144 Version: 1.3.0
5.3.3 Undershoot and overshoot of the measuring range (underrange, overrange) ................ 58
5.3.4 Notch filter (conversion times) ......................................................................................... 58
5.3.5 Limit 1 and Limit 2............................................................................................................ 59
5.3.6 Calibration........................................................................................................................ 59
5.3.7 Producer Codeword......................................................................................................... 60
5.4 Operation with an external cold junction..........................................................................................61
5.5 Interference from equipment ...........................................................................................................62
5.6 Wire break detection........................................................................................................................62
5.7 Process data....................................................................................................................................62
5.7.1 Selection of process data ................................................................................................ 62
5.7.2 Default process image ..................................................................................................... 65
5.7.3 Variant Predefines PDO .................................................................................................. 66
5.7.4 Sync Manager.................................................................................................................. 67
5.8 TwinSAFE SC..................................................................................................................................68
5.8.1 TwinSAFE SC - operating principle ................................................................................. 68
5.8.2 TwinSAFE SC - configuration .......................................................................................... 68
5.8.3 TwinSAFE SC process data of ELX320x-0090 ............................................................... 72
5.9 Object description and parameterization .........................................................................................73
5.9.1 Restore object.................................................................................................................. 73
5.9.2 Configuration data ........................................................................................................... 74
5.9.3 Configuration data (vendor-specific)................................................................................ 75
5.9.4 Input data......................................................................................................................... 76
5.9.5 Output data ...................................................................................................................... 76
5.9.6 Information and diagnostic data....................................................................................... 77
5.9.7 Standard objects (0x1000-0x1FFF) ................................................................................. 77
6 Appendix ..................................................................................................................................................82
6.1 EtherCAT AL Status Codes.............................................................................................................82
6.2 UL notice .........................................................................................................................................82
6.3 FM notice.........................................................................................................................................83
6.4 Support and Service ........................................................................................................................84

Foreword
ELX3312 and ELX3314 5Version: 1.3.0
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®, TwinCAT/BSD®, TC/BSD®, EtherCAT®, EtherCATG®, EtherCATG10®, EtherCATP®,
SafetyoverEtherCAT®, TwinSAFE®, XFC®, XTS® and XPlanar® 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, EP1456722, EP2137893, DE102015105702 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.

Foreword
ELX3312 and ELX33146 Version: 1.3.0
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
Serious risk of injury!
Failure to follow this safety instruction directly endangers the life and health of persons.
WARNING
Risk of injury!
Failure to follow this safety instruction endangers the life and health of persons.
CAUTION
Personal injuries!
Failure to follow this safety instruction can lead to injuries to persons.
NOTE
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.

Foreword
ELX3312 and ELX3314 7Version: 1.3.0
1.3 Documentation Issue Status
Version Comment
1.3.0 • Chapter Basic function principles added
• Chapter Parameterization and programming added
• Chapter Disposal added
• FM notice regarding ANSI/ISA EX added
• Chapter Marking of ELX terminals updated
• Technical data updated
• Design of the safety instructions adapted to IEC 82079-1
• New title page
1.2.0 • Contact assignment extended with sensor illustration
• Chapter Arrangement of ELX terminals within a bus terminal block updated
• Chapter Marking of ELX terminals updated
• Technical data updated
1.1.0 • Chapter Arrangement of ELX terminals at the bus terminal updated
1.0.1 • Layout updated
1.0 • Technical data updated
0.3 • Technical data updated
• Chapter Mounting and Wiring updated
0.2 • Chapter Intended use added
0.1 • First preliminary version (for internal usage only)

Foreword
ELX3312 and ELX33148 Version: 1.3.0
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
ELX1052-0000-0001 ELX terminal 1052: two-channel digital input terminal
for NAMUR sensors, Ex i
0000: basic type 0001
ELX9560-0000-0001 ELX terminal 9560: 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 0000
• The type, software version and revision are read as decimal numbers, even if they are technically
saved in hexadecimal.
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)
Datecode
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: WWYYFFHH
WW - week of production (calendar week)
YY - year of production
FF - firmware version
HH - hardware version
Example with date code: 02180100:
02 - week of production 02
18 - year of production 2018
01 - firmware version 01
00 - hardware version 00

Foreword
ELX3312 and ELX3314 9Version: 1.3.0
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
Fig.1: ELX2008-0000 with date code 2519HMHM, BTN 0001f6hd and Ex marking

Foreword
ELX3312 and ELX331410 Version: 1.3.0
Fig.2: ELX9560-0000 with date code 12150000, BTN 000b000 and Ex marking

Foreword
ELX3312 and ELX3314 11Version: 1.3.0
Fig.3: ELX9012 with date code 12174444, BTN 0000b0si and Ex marking

Product overview
ELX3312 and ELX331412 Version: 1.3.0
2 Product overview
2.1 ELX3312 - Introduction
Fig.4: ELX3312 - 2-channel analog input terminal for thermocouples, 16bit, Exi
The ELX3312 analog input terminal allows the direct connection of thermocouples located in hazardous
areas classified Zone 0/20 or 1/21. The circuitry of the ELX3312 can operate sensors with 2-wire technology.
Linearization is possible over the entire freely selectable temperature range. The error LEDs indicate a
broken wire. Compensation for the cold junction is achieved through internal temperature measurement.
Millivolt measurement is also possible with ELX3312.

Product overview
ELX3312 and ELX3314 13Version: 1.3.0
2.2 ELX3314 - Introduction
Fig.5: ELX3314 - 4-channel analog input terminal for thermocouples, 16bit, Exi
The ELX3314 analog input terminal allows the direct connection of thermocouples located in hazardous
areas classified Zone 0/20 or 1/21. The circuitry of the ELX3314 can operate sensors with 2-wire technology.
Linearization is possible over the entire freely selectable temperature range. The error LEDs indicate a
broken wire. Compensation for the cold junction is achieved through internal temperature measurement.
Millivolt measurement is also possible with ELX3314.

Product overview
ELX3312 and ELX331414 Version: 1.3.0
2.3 Technical data
Technical data ELX3312-0000 ELX3314-0000
Technology temperature measurement
Sensor types thermocouples type B, C, E, J, K, L, N, R, S, T, U
(default: TypeK)
Number of inputs 2 (differential) 4 (differential)
Connection method 2-wire 2-wire
Measuring range (depending on sensor
type):
type B:+200...+1820°C
type C:0...+2320°C
type E:-270...+1000°C
type J:-210...+1200°C
type K:-270...+1370°C (default)
type L:-50...+900°C
type N:-270…+1300°C
type R:-50...+1750°C
type S:-50...+1750°C
type T:-270…+400°C
type U:-50…+600°C
voltage measurement: ±30…±75mV
Resolution 0.1°C per digit
Measuring error < ±0.3 % (relative to full scale value)
Internal resistance ≥ 10kΩ typ. (differential)
Input filter limit frequency typical 1kHz, depending on sensor length, conversion time,
sensor type
Conversion time adjustable: 50…5000ms
(default: 270 ms)
adjustable: 50…5000ms
(default: 310 ms)
Supply voltage electronics via E-Bus (5VDC) and Power Contacts (24VDCEx, feeding by
ELX9560)
Current consumption from the E-Bus typically 70mA
Current consumption from Power Contacts typically 10 mA + load (ELX9560 power supply)
Special features limit value monitoring, digital filter and characteristic curve
linearization integrated
Bit width in the process image 2 x 32 bit input 4 x 32 bit input
Electrical isolation 1500V (E-Bus/ field voltage)
Weight app. 60g
Permissible ambient temperature range
during operation
-25°C ... + 60°C
Permissible ambient temperature range
during storage
-40°C ... + 85°C
Permissible relative humidity 95%, no condensation
Permissible air pressure
(operation, storage, transport)
800hPa to 1100hPa
(this corresponds to a height of approx. -690m to 2000m over
sea level assuming an international standard atmosphere)
Dimensions (W x H x D) app. 15mm x 100mm x 70mm (width aligned: 12mm)
Mounting [}23] on 35mm mounting rail conforms to EN 60715
Vibration/ shock resistance conforms to EN60068-2-6/ EN60068-2-27
EMC immunity/ emission conforms to EN61000-6-2/ EN61000-6-4
Protect. class IP20
Permissible installation position See chapter Installation position and minimum distances
[}22]
Approvals/ markings CE, UL, ATEX, IECEx, cFMus

Product overview
ELX3312 and ELX3314 15Version: 1.3.0
Technical data for explosion protection ELX3312-0000, ELX3314-0000
Ex marking ATEX 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 Ex ec [ia Ga] IIC T4 Gc
[Ex ia Da] IIIC
[Ex ia Ma] I
cFMus AIS Class I, II, III, Division 1, Groups A thru G
Class I, Division 2, Groups A, B, C, D
Class I, Zone 2, AEx/Ex ec [ia Ga] IIC T4 Gc
[AEx/Ex ia Da] IIIC T4
Certificate numbers IECEx BVS 18.0005X
BVS 18 ATEX E 005 X
FM19US0075X, FM19CA0041X
Power supply Invariable in connection with ELX9560
Field interfaces UO = 4.94V
IO = 0.5mA
PO = 0.5mW
Characteristic curve: linear
Reactance (without
consideration of the
simultaneousness)
L0C0
Ex ia I 100mH 1000µF
Ex ia IIA 100mH 1000µF
Ex ia IIB 100mH 1000µF
Ex ia IIC 100mH 100µF
Ex ia IIIC 100mH 1000µF

Product overview
ELX3312 and ELX331416 Version: 1.3.0
2.4 Intended use
WARNING
Endangering the safety of persons and equipment!
The ELX components may only be used for the purposes described below!
CAUTION
Observe ATEX and IECEx!
The ELX components may only be used in accordance with the ATEX directive and the IECEx scheme!
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" (Exe) according to
IEC60079-7 and must only be operated in hazardous areas of Zone2 or in non-hazardous areas.
The field interfaces of the ELX terminals achieve explosion protection through the type of protection "intrinsic
safety" (Exi) according to IEC60079-11. 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.
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.
CAUTION
Ensure traceability!
The buyer has to ensure the traceability of the device via the Beckhoff Traceability Number (BTN).

Mounting and wiring
ELX3312 and ELX3314 17Version: 1.3.0
3 Mounting and wiring
3.1 Special conditions of use for ELX terminals
WARNING
Observe the special conditions of use for the intended use of Beckhoff ELX terminals in
potentially explosive areas (ATEX directive 2014/34/EU)!
• The certified components are to be installed in a suitable housing that guarantees an ingress protection
of at least IP54 in accordance with EN60079-0 and EN60529! 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 tempera-
ture 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 categoryII according to EN60664-1
• 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!
• 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
NOTE
Storage, transport and mounting
• Transport and storage are permitted only in the original packaging!
• 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.
WARNING
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.
CAUTION
Observe the erection regulations
Observe the applicable erection regulations.

Mounting and wiring
ELX3312 and ELX331418 Version: 1.3.0
NOTE
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.
NOTE
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.
NOTE
Protect the terminals against dirt
To ensure the functionality of the ELX terminals they must be protected against dirt, especially on the con-
tact points. For this reason use only clean tools and materials.
NOTE
Handling
• It is forbidden to insert conductive or non-conductive objects of any kind into the interior 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
[}26].
• The opening of the housing, the removal of parts and any mechanical deformation or machining of an
ELX terminal are not permitted!
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.
NOTE
Contact marking and pin assignment
The colored inscription labels above the front connection contacts shown in the illustrations in the introduc-
tion 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!

Mounting and wiring
ELX3312 and ELX3314 19Version: 1.3.0
3.3 Arrangement of ELX terminals within a bus terminal
block
WARNING
Observe the following instructions for the arrangement of ELX terminals!
• ELX signal terminals must always be installed behind an ELX9560 power supply terminal, without excep-
tion!
• 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 seg-
ment with standard Beckhoff EtherCAT terminals (e.g. EL/ES/EK)!
Examples for the arrangement of ELX terminals
Fig.6: Valid arrangement of the ELX terminals (right terminal block).
Fig.7: 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.8: Valid arrangement - multiple power supplies by ELX9560, each with an upstream ELX9410.

Mounting and wiring
ELX3312 and ELX331420 Version: 1.3.0
Fig.9: Valid arrangement - ELX9410 in front of an ELX9560 power supply terminal.
Fig.10: Invalid arrangement - missing ELX9560 power supply terminal.
Fig.11: Invalid arrangement - terminal that does not belong to the ELX series within the ELX terminal
segment.
Fig.12: Invalid arrangement - second ELX9560 power supply terminal within the ELX terminal segment
without an upstream ELX9410.