Beckhoff KS2784 Manuale utente
Documentation | EN
KL2784/KS2784, KL2794/KS2794
Four channel bus terminals with digital switching outputs, solid
state
2021-06-17 | Version: 2.1.0
Table of contents
KL2784/KS2784, KL2794/KS2794 3Version: 2.1.0
Table of contents
1 Foreword ....................................................................................................................................................5
1.1 Notes on the documentation..............................................................................................................5
1.2 Safety instructions .............................................................................................................................6
1.3 Documentation issue status ..............................................................................................................7
2 Product overview.......................................................................................................................................8
2.1 KL2784 - Introduction ........................................................................................................................8
2.2 KL2794 - Introduction ........................................................................................................................9
2.3 Technical data .................................................................................................................................10
2.4 LED display .....................................................................................................................................11
3 Mounting and wiring................................................................................................................................12
3.1 Instructions for ESD protection........................................................................................................12
3.2 Installation on mounting rails ...........................................................................................................13
3.3 Connection ......................................................................................................................................16
3.3.1 Connection system .......................................................................................................... 16
3.3.2 Wiring............................................................................................................................... 18
3.3.3 KL2784 - Connection ....................................................................................................... 19
3.3.4 KL2794 - Connection ....................................................................................................... 20
3.4 ATEX - Special conditions (standard temperature range) ...............................................................21
3.5 Continuative documentation for ATEX and IECEx ..........................................................................22
4 Appendix ..................................................................................................................................................23
4.1 Support and Service ........................................................................................................................23
Table of contents
KL2784/KS2784, KL2794/KS27944 Version: 2.1.0
Foreword
KL2784/KS2784, KL2794/KS2794 5Version: 2.1.0
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®, EtherCATG®, EtherCATG10®, EtherCATP®,
SafetyoverEtherCAT®, 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
KL2784/KS2784, KL2794/KS27946 Version: 2.1.0
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
KL2784/KS2784, KL2794/KS2794 7Version: 2.1.0
1.3 Documentation issue status
Version Comment
2.1.0 • Technical data updated
• Chapter Instructions for ESD protection added
• Design of the safety instructions adapted to IEC 82079-1
• New title page
2.0.0 • Migration
1.0.0 • First release
Hardware and firmware versions
Documentation
version
KL2784/KS2784 KL2794/KS2794
Firmware Hardware Firmware Hardware
2.1.0 - 03 - 03
2.0.0 - 02 - 02
1.0.0 - 02 - 02
The K-bus firmware and hardware version (delivery state) are indicated by the serial number printed at the
side of the terminal.
Syntax of the serial number
Structure of the serial number: WWYYFFHH
WW - week of production (calendar week)
YY - year of production
FF - K-bus firmware version
HH - hardware version
Example with serial number 49 08 1B 03:
49 - week of production 49
08 - year of production 2008
1B - firmware version 1B
03 - hardware version 03
Product overview
KL2784/KS2784, KL2794/KS27948 Version: 2.1.0
2 Product overview
2.1 KL2784 - Introduction
KL2784 - Bus terminal, 4-channel solid state output, 30VAC, 48VDC, 2A
The KL2784 digital output terminal is able to switch voltages up to 30VAC, 48VDC using advanced MOSFET
transistors. The semiconductor switches connected to the power contacts represent a substitute for relay
contacts. They are short-circuit proof and free from wear, thereby increasing the availability of the
application. The output is short-circuit-proof to a limited extent. The output transistor can cope with short-
term overcurrents until the fuse is triggered. The Bus Terminal contains four channels that indicate its signal
state by means of light emitting diodes.
Product overview
KL2784/KS2784, KL2794/KS2794 9Version: 2.1.0
2.2 KL2794 - Introduction
Fig.1: KL2794 - Bus terminal, 4-channel solid state output, 30VAC, 48VDC, 2A, potential-free
The KL2794 digital output terminal is able to switch voltages up to 30VAC, 48VDC using advanced MOSFET
transistors. The four potential-free semiconductor switches represent a substitute for relay contacts. They are
short-circuit proof and free from wear, thereby increasing the availability of the application. The output is
short-circuit-proof to a limited extent. The output transistor can cope with short-term overcurrents until the
fuse is triggered. The Bus Terminal has four channels, whose signal state is displayed by LEDs.
Product overview
KL2784/KS2784, KL2794/KS279410 Version: 2.1.0
2.3 Technical data
Technical data KL2784/KS2784 KL2794/KS2794
Number of outputs 4 make contacts
Rated load voltage 0 … 30VAC/DC (pure ohmic load 0 … 48VDC)
Output current 2A per channel
Breakdown voltage 80V
Peak current 5A (100ms), < 50A (10ms)
Short circuit current not short-circuit proof, see peak current
Switching on speed typical 1.8ms, max. 5ms
Switching off speed typical 30ms, max. 50ms
On-resistance typical 0.03Ω
Isolation voltage - < 200V(channel/channel)
Electrical isolation 500V (K-bus/mains voltage)
Special features alternative for relay contacts alternative for relay contacts,
potential-free
Power supply for the electronics via the K-bus and through the power contacts
Current consumption from K-bus typically: 80mA
Bit width in the output process image 4bit
Configuration via the Bus Coupler or the controller
Weight app. 50g
Permissible ambient temperature range
during operation
0°C ... +55°C
Permissible ambient temperature range
during storage
-25°C ... +85°C
Permissible relative air humidity 95%, no condensation
Dimensions (W x H x D) app. 15mm x 100mm x 70mm (aligned width: 12mm)
Mounting [}13] on 35mm mounting rail conforms to EN60715
Vibration/ shock resistance conforms to EN60068-2-6/ EN60068-2-27
EMC immunity/ emission conforms to EN61000-6-2/ EN61000-6-4
Protection class IP20
Pluggable wiring for all KSxxxx terminals
Correct installation position variable
Approvals/ markings CE, cULus [}21], ATEX
Ex marking
Standard Marking
ATEX II 3 G Ex nA IIC T4 Gc
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