Beckhoff KL26 Series. KS26 Series Operator's manual

Documentation | EN
KL26xx/KS26xx
Relais Output Terminals
2021-08-25 | Version: 2.5.0

Table of contents
KL26xx/KS26xx 3Version: 2.5.0
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 Beckhoff Identification Code (BIC) ....................................................................................................8
2 Product overview.....................................................................................................................................10
2.1 KL2602-00x0, KL2622-00x0 - Introduction......................................................................................11
2.1.1 Technical data ................................................................................................................. 13
2.2 KL/KS2612 - Introduction ................................................................................................................15
2.2.1 Technical data ................................................................................................................. 16
2.3 KL/KS2631 - Introduction ................................................................................................................17
2.3.1 Technical data ................................................................................................................. 18
2.4 KL2634-0000 - Introduction .............................................................................................................19
2.4.1 Technical data ................................................................................................................. 20
2.5 KL2641 - Introduction ......................................................................................................................21
2.5.1 Functional description...................................................................................................... 21
2.5.2 Technical data ................................................................................................................. 23
3 Mounting and wiring................................................................................................................................24
3.1 Instructions for ESD protection........................................................................................................24
3.2 Installation on mounting rails ...........................................................................................................25
3.3 Connection ......................................................................................................................................28
3.3.1 Connection system .......................................................................................................... 28
3.3.2 Wiring............................................................................................................................... 29
3.3.3 KL/KS2602 – connection and LEDs ................................................................................ 31
3.3.4 KL/KS2622 – connection and LEDs ................................................................................ 32
3.3.5 KL/KS2612 – connection and LEDs ................................................................................ 34
3.3.6 KL/KS2631 – connection and LEDs ................................................................................ 35
3.3.7 KL/KS2634 – connection and LEDs ................................................................................ 36
3.3.8 KL2641-0000 – connection and LEDs ............................................................................. 37
3.4 ATEX - Special conditions (standard temperature range) ...............................................................38
3.5 ATEX - Special conditions (extended temperature range) ..............................................................39
3.6 Continuative documentation for ATEX and IECEx ..........................................................................40
3.7 Disposal...........................................................................................................................................40
4 Commissioning........................................................................................................................................41
4.1 Use of the relay terminals................................................................................................................41
4.1.1 KL2612 – service life ....................................................................................................... 41
4.1.2 KL26x2, KL2634 – service life ......................................................................................... 42
4.2 Notes on contact-protecting switching of the EL26x2-0010/ KL26x2-0010 terminals .....................43
5 Appendix ..................................................................................................................................................44
5.1 Support and Service ........................................................................................................................44

Table of contents
KL26xx/KS26xx4 Version: 2.5.0

Foreword
KL26xx/KS26xx 5Version: 2.5.0
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
KL26xx/KS26xx6 Version: 2.5.0
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
KL26xx/KS26xx 7Version: 2.5.0
1.3 Documentation Issue Status
Version Comment
2.5.0 • KL2612 added
• KL2631 added
• KL2641 added
• Technical data updated
• Ex-markings added to the technical data
• Chapter ATEX – special conditions (standard temperature range) added
• Chapter Disposal added
• Document structure updated
• New title page
2.4.0 • Chapter Notes on ESD protection updated
• Chapter Beckhoff Identification Code (BIC) added
2.3.0 • Technical data updated
2.2.0 • KL2634 added
• Chapter Notes on ESD protection added
• Chapter Remark about the use of relay terminals updated
• Document structure updated
2.1.1 • Chapter Notes on the contact-protecting switching of the KL26x2-0010 updated
• Technical data updated
2.1.0 • Chapter Connection updated
• Technical data updated
2.0.0 • Migration
• KL2602-0010 and KL2612-0010 added
1.4 • Technical data updated
• ATEX notes added
1.3 • Foreword updated
• LED prism graphics adapted
1.2 • Technical data updated
• Preface and appendix added
• English translation available
1.1 • Company renamed Beckhoff Automation GmbH
• layout updated
1.0 • First release
Firmware and hardware versions
The firmware and hardware versions (delivery state) can be taken from the serial number printed on the side
of the terminal.
Syntax of the serial number
Structure of the serial number: WW YY FF HH
WW - week of production (calendar week)
YY - year of production
FF - firmware version
HH - hardware version
Example with serial number 40 15 1A 00:
40 - week of production 40
15 - year of production 2015
1A - firmware version 1A
00 - hardware version 00

Foreword
KL26xx/KS26xx8 Version: 2.5.0
1.4 Beckhoff Identification Code (BIC)
The Beckhoff Identification Code (BIC) is increasingly being applied to Beckhoff products to uniquely identify
the product. The BIC is represented as a Data Matrix Code (DMC, code scheme ECC200), the content is
based on the ANSI standard MH10.8.2-2016.
Fig.1: BIC as data matrix code (DMC, code scheme ECC200)
The BIC will be introduced step by step across all product groups.
Depending on the product, it can be found in the following places:
• on the packaging unit
• directly on the product (if space suffices)
• on the packaging unit and the product
The BIC is machine-readable and contains information that can also be used by the customer for handling
and product management.
Each piece of information can be uniquely identified using the so-called data identifier
(ANSIMH10.8.2-2016). The data identifier is followed by a character string. Both together have a maximum
length according to the table below. If the information is shorter, spaces are added to it. The data under
positions 1 to 4 are always available.
The following information is contained:

Foreword
KL26xx/KS26xx 9Version: 2.5.0
Item
no.
Type of
information
Explanation Data
identifier
Number of digits
incl. data identifier
Example
1 Beckhoff order
number
Beckhoff order number 1P 8 1P072222
2 Beckhoff Traceability
Number (BTN)
Unique serial number,
see note below
S 12 SBTNk4p562d7
3 Article description Beckhoff article
description, e.g.
EL1008
1K 32 1KEL1809
4 Quantity Quantity in packaging
unit, e.g. 1, 10, etc.
Q 6 Q1
5 Batch number Optional: Year and week
of production
2P 14 2P401503180016
6 ID/serial number Optional: Present-day
serial number system,
e.g. with safety products
or calibrated terminals
51S 12 51S678294104
7 Variant number Optional: Product variant
number on the basis of
standard products
30P 32 30PF971, 2*K183
...
Further types of information and data identifiers are used by Beckhoff and serve internal processes.
Structure of the BIC
Example of composite information from item 1 to 4 and 6. The data identifiers are marked in red for better
display:
BTN
An important component of the BIC is the Beckhoff Traceability Number (BTN, item no.2). The BTN is a
unique serial number consisting of eight characters that will replace all other serial number systems at
Beckhoff in the long term (e.g. batch designations on IO components, previous serial number range for
safety products, etc.). The BTN will also be introduced step by step, so it may happen that the BTN is not yet
coded in the BIC.
NOTE
This information has been carefully prepared. However, the procedure described is constantly being further
developed. We reserve the right to revise and change procedures and documentation at any time and with-
out prior notice. No claims for changes can be made from the information, illustrations and descriptions in
this information.

Product overview
KL26xx/KS26xx10 Version: 2.5.0
2 Product overview
Terminal Chan-
nels
Nominal voltage Comment
KL2602-0000,
KS2602-0000 [}11]
2 250VAC, 30VDC Make contacts
KL2602-0010,
KS2602-0010 [}11]
2 230VAC Make contacts, contact-protecting switching of LED lamps
KL2612-0000,
KS2612-0000 [}15]
2 125VAC, 30VDC Changeover contacts
KL2622-0000,
KS2622-0010 [}11]
2 250VAC, 30VDC Potential-free make contacts, without power contacts
KL2622-0010,
KS2622-0010 [}11]
2 250VAC, 30VDC Make contacts, contact-protecting switching of LED lamps,
without power contacts,
KL2631-0000,
KS2631-0000 [}17]
1 400VAC, 300VDC Make contacts for power contact
KL2634-0000,
KS2634-0000 [}19]
4 250VAC, 30VDC Potential-free make contacts
KL2641-0000 [}21] 1 230VAC Make contacts, 16A

Product overview
KL26xx/KS26xx 11Version: 2.5.0
2.1 KL2602-00x0, KL2622-00x0 - Introduction
Fig.2: KL2602-0000, KL2602-0010 – two-channel relay output terminals with power contacts
KL2602-0000/ KS2602-0000
These terminals have two relays, each with a single contact, and can be used to switch mains voltage
consumers up to 230VAC. The relay contacts of the terminals are connected to the power contacts.
KL2602-0010/ KS2602-0010
These terminals have two relays, each with a single contact. These terminals switch at zero voltage crossing
to protect the contacts and are especially suitable for capacitive loads such as LED lamps (or rather their
control gears).
LEDs
The signal LEDs indicate the operating state of the associated terminal channel.
Watchdog timer overflow
If no process data are transmitted from the bus coupler to the terminal for 100ms, the green signal LEDs
extinguish and the relay contacts are opened after the typical response time (see technical data [}13]).
Process data
The bit width in the process image is 2bits.

Product overview
KL26xx/KS26xx12 Version: 2.5.0
Fig.3: KL2622-0000, KL2622-0010 – two-channel relay output terminals
KL2622-0000/ KS2622-0000
These terminals have two relays, each with a single contact, and can be used to switch mains voltage
consumers up to 230VAC. The relay contacts of the terminals are potential-free and are not connected to the
power contacts.
KL2622-0010/ KS2622-0010
These terminals have two relays, each with a single contact. These terminals switch at zero voltage crossing
to protect the contacts and are especially suitable for capacitive loads such as LED lamps (or rather their
control gears). The power contacts are not passed through.
LEDs
The signal LEDs indicate the operating state of the associated terminal channel.
Watchdog timer overflow
If no process data are transmitted from the bus coupler to the terminal for 100ms, the green signal LEDs
extinguish and the relay contacts are opened after the typical response time (see technical data [}13]).
Process data
The bit width in the process image is 2bits.

Product overview
KL26xx/KS26xx 13Version: 2.5.0
2.1.1 Technical data
Technical data KL2602-0000, KS2602-0000 KL2622-0000, KS2622-0000
Number of outputs 2 make contacts for power
contact
2 make contacts (potential-free)
Contact material AgCdO
Switching voltage max. 250VAC / 30VDC
Switching current maximum 5A
Maximum switching capacity
with ohmic load
Alternating voltage: 5A250VAC1250VA
Direct voltage: 5A30VDC150W
Max. switching current
with inductive load cosφ = 0.4, L/R = 7ms
2A,250VAC
2A, 30VDC
Minimum permitted load (guide value) 10mA at 5VDC(in delivery state)
100mA at 5VDC (after a current of approx. 100mA (or higher)
has been switched once)
Response times with nominal load Response time: max. 10ms
Release time: max. 4ms
Bounce time: max. 5ms
Electrical isolation 500V (K-bus/ mains voltage)
K-Bus current consumption 80mA 85mA
Bit width in process image 2outputs
Service life – mechanical switching cycles 20,000,000 switching operations
Service life – electrical switching cycles at least 100,000 switching operations of an ohmic load at
250VAC, 5A or 30VDC, 5A
Permitted switching frequency at
maximum contact load
10 switching operations / minute
Contact resistance (new) max. < 30mΩ
Insulation resistance 100MΩ at 500VDC
Test voltage between open contacts at least 750V (1 minute between open contacts)
Configuration No address or configuration settings
Pluggable wiring for all KSxxxx terminals
Weight approx.85g approx.80g
Dimensions (W x H x D) approx. 15mm x 100mm x 70mm (width aligned: 12mm)
Mounting [}25] on 35 mm mounting rail according to EN 60715
Permissible ambient temperature range
during operation
-25°C... +60°C
Permissible ambient temperature range
during storage
-40°C... +85°C
Relative humidity 95% no condensation
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
Installation position variable
Protection class IP20
Approvals/markings CE, UKCA, cULus, EAC, GL, ATEX [}40]
Ex marking
Standard Marking
ATEX II 3 G Ex nA IIC T4 Gc

Product overview
KL26xx/KS26xx14 Version: 2.5.0
Technical data KL2602-0010, KS2602-0010 KL2622-0010, KS2622-0010
Number of outputs 2 make contacts for power
contact
2 make contacts
Contact material Silver alloy (stationary contact gold-plated)
Rated load voltage 230VAC/30VDC
Load type ohmic, inductive, capacitive
Switching current max. typ. 5AAC/DC per channel
Inductive switching current typ. 2AAC/DC per channel
Minimum permitted load typ. 0.1mA at 0.1VDC
Electrical isolation 500V (K-bus / field voltage)
K-Bus current consumption 80mA 85mA
Bit width in process image 2outputs
Response time with nominal load Max. 20ms (= 10ms zero voltage delay at 50Hz+10ms delay
time of the relay)
Switching cycles mech. (min.) 2 x 107 (at 18 x 103 switching cycles per hour)
Switching cycles electr. (min.) 100,000 (3A at 250 VAC, 3A at 30VDC and ohmic load)
80,000 (5A at 250VAC, 5A at 30VDC and ohmic load)
100,000 (2A at 250VAC, 2A at 30VDC and inductive load)
Configuration No address or configuration settings
Special features switches at the zero voltage crossing to protect the contacts
Contact resistance (max.) typ. 100mΩ
Insulation
resistance (min.)
typ. 1000MΩ at 500VDC
Pluggable wiring for all KSxxxx terminals
Weight approx.50g
Dimensions (W x H x D) approx. 15mm x 100mm x 70mm (width aligned: 12mm)
Mounting [}25] on 35mm mounting rail conforms to EN60715
Permissible ambient temperature range
during operation
0°C ... +55°C
Permissible ambient temperature range
during storage
-25°C... +85°C
Relative humidity 95% no condensation
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
Installation position variable
Protection class IP20
Approvals/markings CE, UKCA, cULus, EAC

Product overview
KL26xx/KS26xx 15Version: 2.5.0
2.2 KL/KS2612 - Introduction
Fig.4: KL2612 – two-channel relay output terminal with changeover contacts
Controlled by the automation device, the KL/KS2612 relay output terminals switch two relays, each with a
single changeover contact. They are equipped with potential-free contacts.
The signal status of the relay is displayed by an LED. If the LED is on, it means that the contact between 2
and 1 or, in the case of the second relay, between 6 and 5, is closed.
The Bus Terminals have no power contacts, which means that a voltage that was forwarded via the power
contacts in the case of preceding terminals has to be fed in again after a KL/KS2612.
LEDs
The signal LEDs indicate the operating state of the associated terminal channel.
Watchdog timer overflow
If no process data are transmitted from the bus coupler to the terminal for 100ms, the green signal LEDs
extinguish and the outputs are set to 0.
Process data
The bit width in the process image is 2bits.

Product overview
KL26xx/KS26xx16 Version: 2.5.0
2.2.1 Technical data
Technical data KL2612, KS2612
Number of outputs 2 x change-over
Contact material Gold-plated silver alloy
Nominal voltage 125VAC/30VDC
Load type ohmic
Max. output current 2A per channel
Maximum switching capacity
with ohmic load
Alternating voltage: 0.5A / 125VAC
Direct voltage: 2A / 30VDC
Minimum permitted load (guide value) 10µA at 10mV
Response times with nominal load Max. response time 4ms
Max. release time 4ms
Max. bounce time 4ms
Lamp load, control gear Max. input inrush current 2A
Electrical isolation 500V (K-bus / field voltage)
K-Bus current consumption 60mA
Bit width in process image 2 outputs
Switching cycles mech. (min.) 1x108 switching operations
Switching cycles electr. (min.) 105 switching operations, ohmic load
at 30VDC, 2A
or 125VAC, 0.5A
Permitted switching frequency at maximum
contact load
20switching operations/min
Contact resistance max. (new) <40mOhm
Insulation resistance (min.) 100MOhm at 500VDC
Test voltage between open contacts 750V (1min. between open contacts)
Configuration no address or configuration settings required
Special features Signal relay
Weight approx.80g
Dimensions (W x H x D) 15mmx100mmx70mm (width aligned 12mm)
Mounting [}25] on 35mm mounting rail conforms to EN60715
Permissible ambient temperature during
operation
0°C ... +55°C
Permissible ambient temperature during
storage
-25°C... +85°C
Permissible relative humidity 95%, no condensation
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
Installation position variable
Protection class IP20
Approvals/markings CE, UKCA, cULus, EAC, GL, ATEX [}38]
Ex marking
Standard Marking
ATEX II 3 G Ex nA IIC T4 Gc

Product overview
KL26xx/KS26xx 17Version: 2.5.0
2.3 KL/KS2631 - Introduction
Fig.5: KL2631 – single-channel relay output terminal 400VAC, 300VDC
The KL/KS2631 relay output terminals have a relay with a single contact, which is connected to the power
contacts (usable up to 400VAC) and can be used universally to switch mains voltage consumers. The signal
state of the Bus Terminal is indicated by an LED. In order to use the high voltage up to 400VAC, the terminal
must be supplied by the KL9190 power feed terminal.
LEDs
The signal LEDs indicate the operating state of the associated terminal channel.
Watchdog timer overflow
If no process data are transmitted from the bus coupler to the terminal for 100ms, the green signal LEDs
extinguish and the relay contacts are opened after the typical response time.
Process data
The bit width in the process image is 2bits.

Product overview
KL26xx/KS26xx18 Version: 2.5.0
2.3.1 Technical data
Technical data KL2631, KS2631
Number of outputs 1 make contact for power contact
Nominal voltage 400VAC/300VDC
DC switching capacity 300V = 0.15A; 24V = 5A; non-linear
AC switching capacity 1500VA
Min. switching voltage Power contact
Load type ohmic, inductive, lamp load
Output current max. 2A
Switching current DC switching capacity: 300V = 0.15A; 24V = 5A; non-linear
AC switching capacity: 1500VA
Electrical isolation 500V (K-bus / field voltage)
Current consumption power contacts load only
K-Bus current consumption 80mA
Bit width in process image 2 outputs
Switching cycles mech. (min.) 1x107
Switching cycles electr. (min.) 1.3 x 105 (2A/ 250VAC)
Configuration no address or configuration settings required
Special features 400V contact
Pluggable wiring for all KSxxxx terminals
Weight approx.85g
Dimensions (W x H x D) 15mmx100mmx70mm (width aligned 12mm)
Mounting [}25] on 35mm mounting rail conforms to EN60715
Permissible ambient temperature during
operation
0°C ... +55°C
Permissible ambient temperature during
storage
-25°C... +85°C
Permissible relative humidity 95%, no condensation
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
Installation position variable
Protection class IP20
Approvals/markings CE, UKCA, EAC, GL

Product overview
KL26xx/KS26xx 19Version: 2.5.0
2.4 KL2634-0000 - Introduction
Fig.6: KL2634 – four-channel relay output terminal
The KL/KS2634 output terminal (4make contacts) has four relays, each with a single contact. The signal
status of the Bus Terminal is displayed by an LED. The terminal is equipped with potential-free contacts; the
power contacts L and N are not passed through.
LEDs
The signal LEDs indicate the operating state of the associated terminal channel.
Watchdog timer overflow
If no process data are transmitted from the bus coupler to the terminal for 100ms, the green signal LEDs
extinguish and the relay contacts are opened after the typical response time (see technical data [}20]).
Process data
The bit width in the process image is 4bits.

Product overview
KL26xx/KS26xx20 Version: 2.5.0
2.4.1 Technical data
Technical data KL2634, KS2634
Number of outputs 4 make contacts (potential-free)
Contact material Silver alloy (stationary contact gold-plated)
Rated load voltage 250VAC/30VDC
Load type ohmic, inductive
Ohmic switching current typ. 4A AC/DC per channel
Inductive switching current typ. 2A AC/DC per channel
Minimum permitted load typ. 0.1mA at 0.1VDC (at 120operations/min)
Electrical isolation 500V (K-bus / field voltage)
K-Bus current consumption Typ. 120mA
Bit width in process image 4outputs
Switching cycles mech. (min.) 2 x 107 (at 18 x 103 switching cycles per hour)
Switching cycles electr. (min.) 1 x 105 (3A at 30VDC and ohmic load)
Configuration No address or configuration settings
Contact resistance (max.) typ. 100mΩ
Insulation
resistance (min.)
typ. 1000MΩ at 500VDC
Pluggable wiring for all KSxxxx terminals
Weight approx.70g
Dimensions (W x H x D) approx. 15mm x 100mm x 70mm (width aligned: 12mm)
Mounting [}25] on 35mm support rail according to EN60715
Permissible ambient temperature range
during operation
0°C ... +55°C
Permissible ambient temperature range
during storage
-25°C... +85°C
Relative humidity 95% no condensation
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
Installation position variable
Protection class IP20
Approvals/markings CE, UKCA, EAC