Beckhoff KL6771 Series Operator's manual

Documentation
KL6771
MP-Bus Master Terminals
2.0.0
2018-01-16
Version:
Date:

Table of contents
KL6771 3Version: 2.0.0
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 Introduction ..................................................................................................................................... 8
2.2 Basic Function Principles................................................................................................................ 9
2.3 Diagnostic LEDs ........................................................................................................................... 10
2.4 Technical Data.............................................................................................................................. 11
3 Mounting and wiring ...............................................................................................................................12
3.1 Installation on mounting rails ........................................................................................................ 12
3.2 Installation instructions for enhanced mechanical load capacity .................................................. 14
3.3 Connection.................................................................................................................................... 15
3.3.1 Connection system...........................................................................................................15
3.3.2 Wiring...............................................................................................................................17
3.4 Connection.................................................................................................................................... 19
3.5 MP-Bus cabling............................................................................................................................. 20
3.6 ATEX - Special conditions (standard temperature range) ............................................................ 22
3.7 ATEX Documentation ................................................................................................................... 23
4 MP-Bus .....................................................................................................................................................24
4.1 Introduction ................................................................................................................................... 24
4.2 Topology ....................................................................................................................................... 24
5 Programming ...........................................................................................................................................25
5.1 TwinCAT libraries ......................................................................................................................... 25
6 Appendix ..................................................................................................................................................26
6.1 Support and Service ..................................................................................................................... 26

Table of contents
KL67714 Version: 2.0.0

Foreword
KL6771 5Version: 2.0.0
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®, EtherCAT®, Safety over EtherCAT®, 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.

Foreword
KL67716 Version: 2.0.0
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 symbols
In this documentation the following symbols are used with an accompanying safety instruction or note. The
safety instructions must be read carefully and followed without fail!
DANGER
Serious risk of injury!
Failure to follow the safety instructions associated with this symbol directly endangers the
life and health of persons.
WARNING
Risk of injury!
Failure to follow the safety instructions associated with this symbol endangers the life and
health of persons.
CAUTION
Personal injuries!
Failure to follow the safety instructions associated with this symbol can lead to injuries to
persons.
Attention
Damage to the environment or devices
Failure to follow the instructions associated with this symbol can lead to damage to the en-
vironment or equipment.
Note
Tip or pointer
This symbol indicates information that contributes to better understanding.

Foreword
KL6771 7Version: 2.0.0
1.3 Documentation Issue Status
Version Comment
2.0.0 • Migration
• MP-bus wiring chapter updated
1.4.0 • MP-bus wiring chapter updated
• Foreword updated
• Technical data updated
1.3.0 • MP-bus wiring chapter updated:
From firmware version B3, the MP-bus master terminal can also be used in cablings with
24VAC.
•TwinCAT libraries chapter revised.
1.2.0 • Programming description moved to the Beckhoff Information System [}25]
• TwinCAT library TcMPBus (formerly TcKL6771) updated to version 1.8.0
• ATEX notes added
1.1.0 • UST-3 implemented
• TwinCAT library TcKL6771 updated to version 1.005.000
• Installation notes updated
1.0.1 Sample programs updated
1.0.0 First release
Firmware and hardware versions
Documentation
Version
KL6771-0000, KS6771-0000
Firmware Hardware
2.0.0 B3 06
1.4.0 B3 06
1.3.0 B3 05
1.2.0 B2 02
1.1.0 B2 01
1.0.1 B1 00
1.0.0 B1 00
The firmware and hardware versions (delivery state) of the terminal can be found in the serial number printed
on the side.
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 ser. no.: 33 6 B1 00:
33 - week of production 33
6 - year of production 2006
B1 - firmware version B1
00 - hardware version 00

Product overview
KL67718 Version: 2.0.0
2 Product overview
2.1 Introduction
Fig.1: KL6771
The MP-bus master terminal enables direct connection of MP-bus slaves. The MP-Bus was developed by
Belimo for connecting valves, throttle valves, air valves, fire dampers, and for window ventilation systems. Up
to 16 field devices, 8 drives and 8 sensors can be connected to the KL6771. Process data exchange is
fieldbus-independent. The Bus Terminal is configured and commissioned via TwinCAT function blocks.
Status LEDs directly indicate the bus status. Several KL6771 Bus Terminals can be connected to the same
Bus Coupler or Bus Terminal Controller.

Product overview
KL6771 9Version: 2.0.0
2.2 Basic Function Principles
Fig.2: Basic Function Principles
Operation of the MP-bus Bus Terminal requires function blocks that are available for download [}25].
The following drives and sensors are supported:
• VAVs (e.g. NMV-D2M)
• FLS window opener
• Flap and positioning actuators (e.g. NM24-MFT2, NV23-MFT2)
• Fire dampers (e.g. BF24TL-T-ST)
• PTH sensors
There is a function block that carries out communication with the device for each of these drives or sensors.
The MP-Bus slave is addressed through an addressing block. The slaves can be addressed manually or
automatically.
Software required for use of the KL6771
TwinCAT PLC has a corresponding library for addressing the KL6771 from within the application.
Note
Required TwinCAT library
TwinCAT supports the KL6771 with its own library.
If the KL6771 is to be used with an external controller, a Bus Terminal controller (BC or BX)
is required on which the MP-Bus library can run. Operation of the KL6771 on a PC or CX
without TwinCAT PLC is not supported!

Product overview
KL677110 Version: 2.0.0
2.3 Diagnostic LEDs
The LEDs indicate the operating state of the KL6771.
Fig.3: LEDs
Meaning of the LED displays
LED Color Chan-
nel
State and significance
On off flashes
K-Bus Run green 1 Lit, either weakly or strongly: K-bus
communication OK
No K-Bus
communication
K-Bus communication
MP-Bus Error red • Enable input is set
• PLC program has not started,
or MP-Bus function block is
not accessing the KL6771
No error Error detected
Send green Toggles when an MP telegram is
sent
- Data is being sent
Receive green Toggles when an MP telegram is
received
- Data is being received

Product overview
KL6771 11Version: 2.0.0
2.4 Technical Data
Technical Data KL6771-0000, KS6771-0000
Master channels 1
Transmission standard MP-bus standard
Number of slaves max. 16 (8 actuators and 8 sensors)
Data transfer rate 1200 baud
Electrical isolation 500V (K-bus/ MP-bus)
Power supply for the electronics via the K-bus and through the power contacts
Current consumption from the K-bus typically 55mA
Current consumption from power
contacts
typically 10mA + current consumption of the connected MP-bus
slaves
Output process image 12bytes data
Process image of the inputs 12bytes data
Weight approx. 85g
Dimensions (W x H x D) approx. 12mmx100mmx70mm
Mounting [}12] 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
Permissible relative air humidity 95%, no condensation
Vibration/shock resistance conforms to EN60068-2-6/ EN60068-2-27
see also installation instructions [}14] for terminals with
enhanced mechanical load capacity
EMC immunity/emission conforms to EN61000-6-2 / EN61000-6-4
Protection class IP20
Installation position variable
Pluggable wiring no yes
Approval CE, cULus, ATEX [}22]

Mounting and wiring
KL677112 Version: 2.0.0
3 Mounting and wiring
3.1 Installation on mounting rails
WARNING
Risk of electric shock and damage of device!
Bring the bus terminal system into a safe, powered down state before starting installation,
disassembly or wiring of the Bus Terminals!
Assembly
Fig.4: Attaching on mounting rail
The Bus Coupler and Bus Terminals are attached to commercially available 35mm mounting rails (DIN rails
according to EN60715) 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 compo-
nents 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.
Note
Fixing of mounting rails
The locking mechanism of the terminals and couplers extends to the profile of the mounting
rail. At the installation, the locking mechanism of the components must not come into con-
flict with the fixing bolts of the mounting rail. To mount the mounting rails with a height of
7.5mm under the terminals and couplers, you should use flat mounting connections (e.g.
countersunk screws or blind rivets).

Mounting and wiring
KL6771 13Version: 2.0.0
Disassembly
Fig.5: 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 1cm 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 K-Bus/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 are supplied via terminals on the Bus Coupler (up to 24V)
or for higher voltages via power feed terminals.
Note
Power Contacts
During the design of a bus terminal block, the pin assignment of the individual Bus Termi-
nals must be taken account of, since some types (e.g. analog Bus Terminals or digital 4-
channel Bus Terminals) do not or not fully loop through the power contacts. Power Feed
Terminals (KL91xx, KL92xx or EL91xx, EL92xx) interrupt the power contacts and thus rep-
resent the start of a new supply rail.
PE power contact
The power contact labeled PE can be used as a protective earth. For safety reasons this contact mates first
when plugging together, and can ground short-circuit currents of up to 125A.

Mounting and wiring
KL677114 Version: 2.0.0
Fig.6: Power contact on left side
Attention
Possible damage of the device
Note that, for reasons of electromagnetic compatibility, the PE contacts are capacitatively
coupled to the mounting rail. This may lead to incorrect results during insulation testing or
to damage on the terminal (e.g. disruptive discharge to the PE line during insulation testing
of a consumer with a nominal voltage of 230V). For insulation testing, disconnect the PE
supply line at the Bus Coupler or the Power Feed Terminal! In order to decouple further
feed points for testing, these Power Feed Terminals can be released and pulled at least
10mm from the group of terminals.
WARNING
Risk of electric shock!
The PE power contact must not be used for other potentials!
3.2 Installation instructions for enhanced mechanical load
capacity
WARNING
Risk of injury through electric shock and damage to the device!
Bring the Bus Terminal system into a safe, de-energized state before starting mounting,
disassembly or wiring of the Bus Terminals!
Additional checks
The terminals have undergone the following additional tests:
Verification Explanation
Vibration 10 frequency runs in 3 axes
6 Hz < f < 60 Hz displacement 0.35 mm, constant amplitude
60.1Hz<f<500Hz acceleration 5g, constant amplitude
Shocks 1000 shocks in each direction, in 3 axes
25 g, 6 ms

Mounting and wiring
KL6771 15Version: 2.0.0
Additional installation instructions
For terminals with enhanced mechanical load capacity, the following additional installation instructions apply:
• The enhanced mechanical load capacity is valid for all permissible installation positions
• Use a mounting rail according to EN 60715 TH35-15
• Fix the terminal segment on both sides of the mounting rail with a mechanical fixture, e.g. an earth
terminal or reinforced end clamp
• The maximum total extension of the terminal segment (without coupler) is:
64 terminals (12 mm mounting with) or 32 terminals (24 mm mounting with)
• Avoid deformation, twisting, crushing and bending of the mounting rail during edging and installation of
the rail
• The mounting points of the mounting rail must be set at 5 cm intervals
• Use countersunk head screws to fasten the mounting rail
• The free length between the strain relief and the wire connection should be kept as short as possible. A
distance of approx. 10 cm should be maintained to the cable duct.
3.3 Connection
3.3.1 Connection system
WARNING
Risk of electric shock and damage of device!
Bring the bus terminal system into a safe, powered down state before starting installation,
disassembly or wiring of the Bus Terminals!
Overview
The Bus Terminal system offers different connection options for optimum adaptation to the respective
application:
• The terminals of ELxxxx and KLxxxx series with standard wiring include electronics and connection
level in a single enclosure.
• The terminals of ESxxxx and KSxxxx series feature a pluggable connection level and enable steady
wiring while replacing.
• The High Density Terminals (HD Terminals) include electronics and connection level in a single
enclosure and have advanced packaging density.
Standard wiring (ELxxxx / KLxxxx)
Fig.7: Standard wiring
The terminals of ELxxxx and KLxxxx series have been tried and tested for years.
They feature integrated screwless spring force technology for fast and simple assembly.

Mounting and wiring
KL677116 Version: 2.0.0
Pluggable wiring (ESxxxx / KSxxxx)
Fig.8: Pluggable wiring
The terminals of ESxxxx and KSxxxx series feature a pluggable connection level.
The assembly and wiring procedure is the same as for the ELxxxx and KLxxxx series.
The pluggable connection level enables the complete wiring to be removed as a plug connector from the top
of the housing for servicing.
The lower section can be removed from the terminal block by pulling the unlocking tab.
Insert the new component and plug in the connector with the wiring. This reduces the installation time and
eliminates the risk of wires being mixed up.
The familiar dimensions of the terminal only had to be changed slightly. The new connector adds about 3
mm. The maximum height of the terminal remains unchanged.
A tab for strain relief of the cable simplifies assembly in many applications and prevents tangling of individual
connection wires when the connector is removed.
Conductor cross sections between 0.08mm2 and 2.5mm2 can continue to be used with the proven spring
force technology.
The overview and nomenclature of the product names for ESxxxx and KSxxxx series has been retained as
known from ELxxxx and KLxxxx series.
High Density Terminals (HD Terminals)
Fig.9: High Density Terminals
The Bus Terminals from these series with 16 terminal points are distinguished by a particularly compact
design, as the packaging density is twice as large as that of the standard 12mm Bus Terminals. Massive
conductors and conductors with a wire end sleeve can be inserted directly into the spring loaded terminal
point without tools.
Note
Wiring HD Terminals
The High Density (HD) Terminals of the ELx8xx and KLx8xx series doesn't support plug-
gable wiring.
Ultrasonically "bonded" (ultrasonically welded) conductors
Note
Ultrasonically “bonded" conductors
It is also possible to connect the Standard and High Density Terminals with ultrasonically
"bonded" (ultrasonically welded) conductors. In this case, please note the tables concern-
ing the wire-size width below!

Mounting and wiring
KL6771 17Version: 2.0.0
3.3.2 Wiring
WARNING
Risk of electric shock and damage of device!
Bring the bus terminal system into a safe, powered down state before starting installation,
disassembly or wiring of the Bus Terminals!
Terminals for standard wiring ELxxxx/KLxxxx and for pluggable wiring ESxxxx/KSxxxx
Fig.10: Connecting a cable on a terminal point
Up to eight terminal points enable the connection of solid or finely stranded cables to the Bus Terminal. The
terminal points are implemented in spring force technology. Connect the cables as follows:
1. Open a terminal point by pushing a screwdriver straight against the stop into the square opening
above the terminal point. Do not turn the screwdriver or move it alternately (don't toggle).
2. The wire can now be inserted into the round terminal opening without any force.
3. The terminal point closes automatically when the pressure is released, holding the wire securely and
permanently.
See the following table for the suitable wire size width.
Terminal housing ELxxxx, KLxxxx ESxxxx, KSxxxx
Wire size width (single core wires) 0.08 ... 2.5mm20.08 ... 2.5mm2
Wire size width (fine-wire conductors) 0.08 ... 2.5mm20,08 ... 2.5mm2
Wire size width (conductors with a wire end sleeve) 0.14 ... 1.5mm20.14 ... 1.5mm2
Wire stripping length 8 ... 9mm 9 ... 10mm
High Density Terminals (HD Terminals [}16]) with 16 terminal points
The conductors of the HD Terminals are connected without tools for single-wire conductors using the direct
plug-in technique, i.e. after stripping the wire is simply plugged into the terminal point. The cables are
released, as usual, using the contact release with the aid of a screwdriver. See the following table for the
suitable wire size width.

Mounting and wiring
KL677118 Version: 2.0.0
Terminal housing High Density Housing
Wire size width (single core wires) 0.08 ... 1.5mm2
Wire size width (fine-wire conductors) 0.25 ... 1.5mm2
Wire size width (conductors with a wire end sleeve) 0.14 ... 0.75mm2
Wire size width (ultrasonically “bonded" conductors) only 1.5mm2
Wire stripping length 8 ... 9mm

Mounting and wiring
KL6771 19Version: 2.0.0
3.4 Connection
WARNING
Risk of injury through electric shock and damage to the device!
Bring the Bus Terminals system into a safe, de-energized state before starting mounting,
disassembly or wiring of the Bus Terminals!
Fig.11: Connection
Terminal point No. Connection for
MP-Bus 1 Cable 5 (white or orange)
+ 24VDC (+) 2 Cable 2 (red)
0V (-) 3 Cable 1 (black)
Enable 4 Deactivates the MP-Bus master on the KL6771
MP-Bus 5 Cable 5 (white or orange)
+ 24VDC (+) 6 Cable 2 (red)
0V (-) 7 Cable1 (black)
Enable 8 Deactivates the MP-Bus master on the KL6771
Note
Enable input
If 24 VDC is applied to the Enable input, the KL6771 will halt the MP-Bus communication.
The higher-level PLC receives a message, and the MP Error LED lights up.

Mounting and wiring
KL677120 Version: 2.0.0
3.5 MP-Bus cabling
WARNING
Risk of injury through electric shock and damage to the device!
Bring the Bus Terminals system into a safe, de-energized state before starting mounting,
disassembly or wiring of the Bus Terminals!
Maximum MP-bus length
The maximum cable length is obtained by considering the following points:
• The total of the power figures for all the connected bus devices
• Wire cross-section
• AC (from firmware version B3) or DC
Operation of MP-bus slaves (actuators) with DC power supply
Fig.12: Operation of MP-bus slaves (actuators) with DC power supply
Operation of MP-bus slaves (actuators) with AC power supply
(from firmware version B3)
Fig.13: Operation of MP-bus slaves (actuators) with AC power supply
The upper power supply unit supplies the actuators with AC voltage.
The lower power supply unit supplies the MP-bus master terminal (via the power contacts of the BK, BC, BX
or CX).