Beckhoff KL6821 Operator's manual

Documentation | EN
KL6821
DALI-2 Multimaster Terminal with integrated Power Supply
2023-06-27 | Version: 1.0.0

Table of contents
KL6821 3Version: 1.0.0
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 Technical data...................................................................................................................................9
2.3 DALI ................................................................................................................................................10
2.3.1 IEC 62386 ........................................................................................................................ 10
2.3.2 Communication ................................................................................................................11
2.3.3 Priorities ...........................................................................................................................12
2.3.4 Bus Timing ....................................................................................................................... 13
2.3.5 Memory banks.................................................................................................................. 17
2.3.6 DALI-2 current..................................................................................................................19
3 Mounting and wiring ...............................................................................................................................21
3.1 Instructions for ESD protection .......................................................................................................21
3.2 Installation on mounting rails...........................................................................................................22
3.3 Disposal ..........................................................................................................................................24
3.4 Connection ......................................................................................................................................25
3.4.1 Connection system........................................................................................................... 25
3.4.2 Wiring ...............................................................................................................................27
3.4.3 Shielding ..........................................................................................................................28
3.4.4 Connection .......................................................................................................................29
3.5 LED displays ...................................................................................................................................30
4 KS2000 Configuration Software ............................................................................................................32
4.1 KS2000 - Introduction .....................................................................................................................32
4.2 KL6821 configuration ......................................................................................................................34
4.3 KS2000 Settings .............................................................................................................................35
5 Programming...........................................................................................................................................37
5.1 TwinCAT libraries............................................................................................................................37
6 Appendix..................................................................................................................................................38
6.1 Support and Service........................................................................................................................38

Table of contents
KL68214 Version: 1.0.0

Foreword
KL6821 5Version: 1.0.0
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®, 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
KL68216 Version: 1.0.0
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 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.
NOTICE
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
KL6821 7Version: 1.0.0
1.3 Documentation issue status
Version Comment
1.0.0 • Chapter Technical data updated
0.3 • Chapter DALI-2 current added
0.2 • Chapter Product overview extended
• Chapter Configuration software KS2000 extended
• Link to TwinCAT libraries added
0.1 • First draft
Firmware and hardware versions
Documentation
Version
KL6821
Firmware Hardware
1.0.0 09 09
0.3 09 09
0.2 08 08
0.1 08 08
The firmware and hardware versions (delivery state) of the terminal can be found in the serial number printed
on the side.
The KL6821 from firmware 08 and hardware 08 is DALI-2 certified and can be clearly identified by the
DALI-2 logo on the terminal side.
Compared to the previous firmware versions (B8 to BD) and hardware versions (01 to 07) and adjustments
have been made. For example, the certification-relevant GTIN and also a readable unique serial number are
present in the certified KL6821.
This documentation refers to the KL6821 from FW 08 and HW 08 or higher.
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 35 04 1B 01:
35 - week of production 35
04 - year of production 2004
1B - firmware version 1B
01 - hardware version 01

Product overview
KL68218 Version: 1.0.0
2 Product overview
2.1 Introduction
Fig.1: KL6821
The KL6821 allows the connection of up to 64 DALI control gears and up to 63 DALI-2 control devices. The
KS2000 configuration software facilitates parameterization via a PC. The KL6821 contains an integrated
DALI-2 power supply that can be switched off with electrically isolated output voltage. No further components
are required for operation of the DALI devices. Only TwinCAT function blocks are used for operation. The
KL6821 operates fieldbus-independent. DALI control gears (version 1) and DALI-2 devices can be used in
mixed operation.
The KL6821 from firmware 08 and hardware 08 is certified according to DALI-2 standard (IEC 62386) Part
101 and Part 103 and can be recognized by the DALI-2 logo on the terminal side.

Product overview
KL6821 9Version: 1.0.0
2.2 Technical data
Technical data KL6821
Data transfer channels 1
DALI slaves/ groups max. 64 DALI control gears and max. 63 DALI-2 control
devices / max. 16 groups
Bit width in the K-bus I/O 4 x 8bit user data, 1 x 16bit control/status
Input process image 1 status word and 4 data bytes
Output process image 1 control word and 4 data bytes
Configuration via the bus coupler or the controller
Power supply for the electronics via the K-bus
Current consumption via K-bus typically 55mA
Current consumption of the 24V connections typically 30mA + DALI current
Input voltage 24VDC (-15%/+ 20%)
Insulation voltage DALI bus/K-bus: permanently 1500VAC
DALI bus/power contacts: permanently 1500VAC
K-bus/power contacts: permanently 500VAC
Transmission DALI-2 (certified)
DALI power supply unit max. 250mA, can be switched off
Guaranteed DALI supply current 220mA
DALI current with DALI power supply unit switched
off
2 mA
Weight approx.80g
Dimensions (W x H x D) approx. 12mm x 100mm x 68mm
Installation [}22] on 35mm mounting rail, conforming to EN60715
Power loss approx. 0.5W + max. 0.5W depending on DALI output
current
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
EMC immunity/emission conforms to EN61000-6-2/ EN61000-6-4
Protection rating IP20
Installation position variable
Approvals/markings* CE, UKCA, EAC
*) Real applicable approvals/markings see type plate on the side (product marking).

Product overview
KL682110 Version: 1.0.0
2.3 DALI
DALI (Digital Addressable Lighting Interface) is a definition for the standardization of digital interfaces
between control gears (lamps) and control devices (sensors and application controllers). The standard
(IEC62386) allows the manufacturers of lighting components to implement complex lighting tasks easily and
conveniently.
The KL6811 (DALI version-1/DSI) and KL6821/EL6821 (DALI-2) Bus Terminals are integrated into the bus
terminal system and are therefore fieldbus-independent. The DALI data is forwarded to the DALI devices via
the respective bus coupler. Bus controllers also offer the option of running PLC programs locally in IEC
61131-3.
To ensure the interoperability of DALI-2 devices with each other, the DALI Alliance (DiiA) provides a
certification program. Products that have successfully completed the DALI-2 certification process may use
the DALI-2 logo.
All certified DALI-2 devices are entered in the DiiA product database. The product database can be
accessed via the DiiA homepage:
https://www.dali-alliance.org/products/4844/kl6821-dali-dali-2-multi-master-and-power-supply
2.3.1 IEC 62386
DALI is specified in the IEC 62386 standard and offers advantages such as flexibility, simplicity, user
friendliness and robustness. IEC 62386 has been revised several times and was extended considerably in
November 2014 with the publication of the second revision. While in the first revision only DALI control gears
(lamps) were considered, from the second revision onwards DALI control devices (sensors and application
controllers) are also included. These are described in the respective section of IEC 62386:
IEC 62386-101 General system properties such as cabling, feed-in and telegram structure
IEC 62386-102 General properties of the DALI control gears.
IEC 62386-201: Fluorescent lamps (device type 0)
IEC 62386-202: Emergency lighting (device type 1)
IEC 62386-203: Discharge lamps (device type 2)
IEC 62386-207: LED modules (device type 6)
...
IEC 62386-103 General properties of the DALI control devices
IEC 62386-301: Push buttons
IEC 62386-302: Absolute input devices
IEC 62386-303: Occupancy sensor
IEC 62386-304: Light sensor
...
The IEC 62386-101, IEC 62386-102 and IEC 62386-103 standards describe general properties, while the
IEC 62386-2xx and IEC 62386-3xx standards specify the individual device types. IEC 62386-103 and IEC
62386-3xx were included in Revision 2 of the DALI standard.

Product overview
KL6821 11Version: 1.0.0
Up to 64 DALI control gears and up to 64 DALI control devices can be connected to the KL6821 per DALI
line. The KL6821 represents the DALI controller. One such device exists for each DALI line. Up to 64 control
gears, which have to be DALI/DSI devices, can be connected to the KL6811. Any number of DALI lines
(KL6821 and KL6811) can be operated with a single TwinCAT controller.
2.3.2 Communication
With regard to the communication, a distinction is made between three telegram types:
• 16-bit query, configuration and control telegram.
• 24-bit query, configuration and control telegram.
• 24-bit event telegram.
BF: backward frame
FF: forward frame
16-bit telegrams
16-bit telegrams are always sent from a DALI controller to a DALI control gear. They are used for configuring
the devices, querying parameters or sending control commands. For certain DALI commands the DALI
control gear sends an 8-bit response. DALI control gears only send an 8-bit telegram when requested.
In the Tc3_DALI library these commands are identified by the PLC function blocks with the prefix
FB_DALI102 or FB_DALI2xx, e.g. FB_DALI102QueryActualLevel or FB_DALI207QueryFeatures.

Product overview
KL682112 Version: 1.0.0
24-bit telegrams
24-bit telegrams are always sent from a DALI controller to a DALI control device. They are used for
configuring the devices, querying parameters or sending control commands. For certain DALI commands the
DALI control device sends an 8-bit response.
In the Tc3_DALI library these commands are identified by the PLC function blocks with the prefix
FB_DALI103 or FB_DALI3xx, e.g. FB_DALI103QueryOperatingMode or FB_DALI303SetHoldTimer.
24-bit events
DALI control devices are able to send events. They are always evaluated by the DALI controller and have a
length of 24 bits.
Individual events can be filtered out and further processed with the function blocks
FB_DALIGetInputNotification and FB_DALIGetPowerCycleNotification.
Further information on DALI can be found on the homepage of the DALI Alliance (https://www.dali-
alliance.org) and in the IEC 62386 standard.
The KL6811 only supports the first revision of the DALI standard. It is not possible to operate control
devices with the KL6811.
2.3.3 Priorities
Since DALI-2 is a multi-master bus system, simultaneous bus access of several DALI masters is controlled
based on priorities. According to IEC 62386, all DALI-2 devices that can initiate sending of a DALI command
(controllers) or sending of an event (input devices) on the DALI bus are referred to as masters. Under
DALI-2, these are also referred to as control devices and are described in more detail in IEC 62386-103.
All DALI-2 devices of a DALI line must share the same data line. To avoid collisions during sending, the
sending device checks whether the DALI bus has already been assigned. Sending takes place after a certain
settling time, once the DALI bus is free. For high-priority DALI commands the bus access takes place after a
short settling time, for low-priority commands the settling time is longer. In other words, high-priority DALI
commands are given preference over low-priority DALI commands.
DALI control gears are defined in IEC 62386-102. They are not capable of sending DALI commands or
events independently. DALI control gears may only return the 8-bit backward frame to forward frames sent
by a DALI controller (see also Communication [}11]). Since a DALI controller waits for the backward frame,
the 8-bit backward frame has the shortest settling time. This settling time is shorter than for DALI commands
with the highest priority. This means that DALI forward frames can be processed without interference from
other DALI commands.
The priorities used by a DALI controller for sending the DALI commands are referred to as command
priorities and are mapped by the data type E_DALICommandPriority. Command priorities can have 5
different values:
•Low:DALI priority 5
•Middle low:DALI priority 4
•Middle:DALI priority 3
•Middle high:DALI priority 2
•High:DALI priority 1
Most function blocks referred to in chapter Part 102 (control gears) have the input eCommandPriority. This
input is used to specify the priority with which the DALI commands are to be sent via the KL6821.
Events also have a priority (event priority), which is represented by the data type E_DALIEventPriority. Event
priorities can have 4 values in the range Low (DALI priority 5) to Middle high (DALI priority 2). The event
priority is written as a parameter (see instance variable eventPriority) into the respective instances of the
DALI devices.

Product overview
KL6821 13Version: 1.0.0
Priority High (DALI priority 1) is only allowed for DALI-2 commands and cannot be used for events.
Tc3_DALI uses the following default values for the priorities:
E_DALICommandPriority/
E_DALIEventPriority
Application
Low -
MiddleLow Light sensor events (Part 304).
All other DALI commands.
Middle Events of push buttons (Part 301), absolute input devices (Part 302) and
occupancy sensors (Part 303).
MiddleHigh DALI commands for writing parameters and for addressing DALI devices.
High DALI commands for transactions (from the second DALI command).
When selecting priorities, care should always be taken to ensure that time-critical events that are important
for switching the lighting have a higher priority than the DALI commands themselves. Non-system-critical
DALI commands, such as the cyclic querying of states for the display in a visualization, should be sent with a
lower priority.
Priorities for DALI commands (E_DALICommandPriority) are supported from Tc3_DALI V3.11.0.0. The
KL6821 must contain firmware BD or later. Older firmware versions always send DALI commands with the
priority High.
Neither the KL6811 nor the Tc2_DALI library support priorities for DALI commands.
Priorities are always important in situations where DALI sensors (input devices) send events and DALI
commands are sent in parallel via the KL6821. If no DALI sensors (input devices) are used, the priority of the
DALI commands is of secondary importance, since in this case there is only one DALI master (the KL6821).
Further details about the DALI priorities can also be found in the following chapter Bus Timing [}13].
2.3.4 Bus Timing
The following describes the structure and operation of the DALI protocol. This description focuses on the
most important basic principles. For a full explanation, the IEC 62386 standard, in particular Part 101, should
be consulted.
2.3.4.1 Structure data frame
Each Forward Frame (FF) and Backward Frame (BF) basically consists of:
• 1 start bit
• n data bits
• 1 stop condition
The most significant bit (MSB) is transmitted at the beginning.
Transmission is via Manchester coding with a data transfer rate of 1200 bits per second. Thus, each bit has
a length of 0.833ms (1 / 1200 = 0.000833).

Product overview
KL682114 Version: 1.0.0
The Stop condition has a length of at least 2.45 ms.
A fixed time (settling time) must be waited between the sending of two data frames before the sending of the
next data frame can be started.
The length of the settling time depends on the DALI priority with which a data frame is sent. The higher the
DALI priority, the smaller the settling time.
Settling time Minimum Mean value Maximum
between FF and BF 5.5ms 8.0ms 10.5ms
before each FF (DALI
priority High)
13.5ms 14.1ms 14.7ms
before each FF (DALI
priority Middle high)
14.9ms 15.5ms 16.1ms
before each FF (DALI
priority Middle)
16.3ms 17.0ms 17.7ms
before each FF (DALI
priority Middle low)
17.9ms 18.6ms 19.3ms
before each FF (DALI
priority Low)
19.5ms 20.3ms 21.2ms
More information about DALI priorities is also available in the chapter Priorities [}12].
Thus, data frames with a higher DALI priority (low settling time) occupy the DALI bus earlier, compared to
data frames with a lower DALI priority (high settling time).
Certain DALI commands must be sent twice within 100 ms (send-twice) without the receiver being allowed to
receive another DALI command in the meantime. Only then will the DALI command be recognized as valid
by the receiver. This is primarily used with DALI commands that are used to configure DALI devices. So that
the two DALI commands are not interrupted by another DALI command, the 2nd DALI command is always
sent with DALI priority High. The DALI priority High is reserved for these DALI commands and must not be
used in any other context.
2.3.4.2 Transmission length
The approximate transmission length can be determined from the bit length and the structure of the data
frame. For further (simplified) consideration, a mean settling time of 17.0 ms is used for the forward frames
(FF), and a mean settling time of 8 ms for the backward frames (BF). Between the two DALI commands sent
within 100 ms (send-twice), a settling time of 14.1 ms is used.
The number of bits results from the number of data bits (8, 16 or 24) plus the start bit. Thus 9, 17 or 25 bits
are transmitted with the respective telegrams.
16-bit telegram without backward frame:
17.0 ms + (17 x 0.833 ms) = 31.2 ms.
16-bit telegram with backward frame:
17.0 ms + (17 x 0.833 ms) + 8.0 ms + (9 x 0.833 ms) = 46.7 ms.
16-bit telegram send-twice:
17.0 ms + (17 x 0.833 ms) + 14.1 ms + (17 x 0.833 ms) = 59.4 ms.

Product overview
KL6821 15Version: 1.0.0
24-bit telegram without backward frame:
17.0 ms + (25 x 0.833 ms) = 37.8 ms.
24-bit telegram with backward frame:
17.0 ms + (25 x 0.833 ms) + 8.0 ms + (9 x 0.833 ms) = 53.3 ms.
24-bit telegram send-twice:
17.0 ms + (25 x 0.833 ms) + 14.1 ms + (25 x 0.833 ms) = 72.8 ms.
The following table lists the average transmission lengths of the individual telegrams. This results in a
maximum possible number of telegrams per second. The PLC program should be designed in such a way
that the number of telegrams always falls below the maximum.
Telegram Transmission length Telegrams per second
16-bit telegram without backward
frame
31.2ms approx. 32
16-bit telegram with backward
frame
46.7ms approx. 21
16-bit telegram send-twice 59.4ms approx. 16
24-bit telegram without backward
frame
37.8ms approx. 26
24-bit telegram with backward
frame
53.3ms approx. 18
24-bit telegram send-twice 72.8ms approx. 13
2.3.4.3 Collision detection
The generation of the DALI telegrams is achieved in a DALI device by changing between high and low level
within defined times. At a low level, the DALI bus is pulled towards 0V against a current limitation. With a
high level, the DALI connection from the DALI device is high-resistance.
Since DALI is a multi-master system, it may happen that several DALI devices try to send DALI telegrams
independently of each other. For this reason, DALI includes collision avoidance, collision detection and
collision resolution.
Collision avoidance is achieved by using the DALI priorities. Before a DALI device sends a DALI telegram, it
is checked whether the DALI bus is free. Only if the DALI bus is free (high level), a bus access may take
place. Correct use of DALI priorities reduces the probability of simultaneous bus access and thus minimizes
the number of collisions.
Nevertheless, the DALI priorities cannot completely avoid collisions on the DALI bus, since DALI telegrams
from different DALI devices may have the same DALI priority. For this reason, DALI has collision detection
and collision resolution.
The following diagram explains the collision resolution.
If several DALI devices send a high level, this cannot be detected by the DALI devices. The resulting voltage
on the DALI bus is also a high level in this case.
At point A DALI device 1 detects a collision, because an attempt is made to generate a high signal at this
point, but the DALI bus is pulled to low level by DALI device 2. DALI device 1 starts the break sequence for
this reason. During this time the DALI device pulls the DALI bus to low level.
At point B DALI device 2 tries to generate a high level. However, since the DALI bus is pulled to low level by
DALI device 1, DALI device 2 also detects a collision and also starts the break sequence.
At point C the break sequence of DALI device 1 has expired. Subsequently, it is checked whether the DALI
bus is still at low level. Since this is the case, the system waits until the DALI bus is free again. DALI device 1
then starts sending the DALI telegram again, including the settling time.
If the break sequence is finished at DALI device 2, the DALI bus is not occupied by any other DALI device
(point D). Therefore the recover sequence is started at DALI device 2 and then the DALI telegram is sent
again directly (without settling time).

Product overview
KL682116 Version: 1.0.0
The break sequence has a length of 1.2 ms to 1.4 ms, while the recover sequence can be between 4.0 ms
and 4.6 ms.
Collisions on the DALI bus interrupt the transmission on the DALI bus for several milliseconds. This further
reduces the data throughput. For this reason, a DALI system should be put together and configured in such
a way that as few collisions as possible occur.
2.3.4.4 Cycle times PLC tasks
For practical application, the cycle times of the PLC tasks should, if possible, always be set so that the
maximum data transfer rate from the DALI bus is achieved.
Tests were performed to determine the number of telegrams at different cycle times of the PLC tasks. For
this purpose, a PLC program was used, which cyclically sends 6 telegrams independently of each other.
Three 16-bit telegrams (2 x without backward frame, 1 x with backward frame) and three 24-bit telegrams (2
x without backward frame, 1 x with backward frame) were sent. Since the send-twice telegrams are only of
importance for the configuration of DALI devices, they were not considered further. The total transmission
length of the 6 telegrams was thus 238 ms (2 x 21.2 ms + 46.7 ms + 2 x 37.8 ms + 53.3 ms). This means
that the sample program could send a maximum of 25 telegrams per second (1000 ms / 238 ms x 6). Events
that are additionally sent by possible DALI sensors (input devices) are not taken into account.
80ms 60ms 40ms 30ms 20ms 10ms 8ms 6ms 4ms
30ms 677888888
15ms 11 11 12 12 13 13 13 13 13
10ms 15 15 16 17 17 17 17 17 17
8ms 18 18 19 19 20 20 20 20 20
6ms 20 21 21 22 22 22 22 22 22
4ms 23 23 24 25 25 25 25 25 25
2ms 23 24 25 25 25 25 25 25 25
The times in the top line (4 ms ... 80 ms) specify the cycle time of the PLC task from which the DALI
commands are started. The times (2 ms ... 30 ms) in the first column specify the cycle time of the PLC task
for background communication.

Product overview
KL6821 17Version: 1.0.0
2.3.4.5 Summary
Even though the test program is only representative, it can be clearly seen that the cycle time of the
background communication has a decisive influence on the data throughput. If a maximum data transfer rate
is required on the DALI bus, the following points must be observed:
• K-bus and fieldbus should be arranged so that the cycle time for the PLC task accessing the DALI
terminal (background communication) does not exceed 6 ms.
• The number of events of the DALI sensors (input devices) should be as low as possible. The more
events are sent, the higher the probability of collisions on the DALI bus. The DALI sensors should be
configured so that the number of events is minimal.
• To reduce the number of collisions on the DALI bus, the DALI priorities should be used.
Recommendations for this can be found in the chapter DALI priorities [}12].
• A large number of DALI control devices also increases the probability of collisions on the DALI bus. If
necessary, the DALI control devices must be divided among different DALI lines. DALI control devices
are DALI controllers and DALI sensors (see chapter Communication [}11]).
2.3.5 Memory banks
Memory banks are freely accessible memory areas in which device-specific information and properties can
be stored. The contents of the memory banks can be read with FB_DALI10xReadMemoryLocation (see
FB_DALI102ReadMemoryLocation and FB_DALI103ReadMemoryLocation) and, if enabled, written with
FB_DALI10xWriteMemoryLocationNoReply (see FB_DALI102WriteMemoryLocationNoReply and
FB_DALI103WriteMemoryLocationNoReply).
Part of the memory banks can be provided with write protection.
A DALI device can support a maximum of 256 memory banks, each with up to 255 bytes, with memory
banks 200 to 255 being reserved. Memory bank 0 and memory bank 1 are predefined by IEC 62386.
Structure of memory bank 0:
Memory bank 0 is read only and contains general, vendor-specific information about the DALI control gear or
DALI control device. Every certified DALI device must implement memory bank 0. Up to offset 16#1A the
fields are defined by IEC 62386 as follows.

Product overview
KL682118 Version: 1.0.0
Offset Description Default values
16#00 Offset of the last memory area inside the memory bank that can
be accessed.
Vendor-specific
16#01 Reserved, not implemented
16#02 Number of the last memory bank that can be accessed. Vendor-specific
16#03 GTIN byte 0 (MSB) Vendor-specific
16#04 GTIN byte 1 Vendor-specific
16#05 GTIN byte 2 Vendor-specific
16#06 GTIN byte 3 Vendor-specific
16#07 GTIN byte 4 Vendor-specific
16#08 GTIN byte 5 (LSB) Vendor-specific
16#09 Firmware Version (major) Vendor-specific
16#0A Firmware Version (minor) Vendor-specific
16#0B Identification number byte 0 (MSB) Vendor-specific
16#0C Identification number byte 1 Vendor-specific
16#0D Identification number byte 2 Vendor-specific
16#0E Identification number byte 3 Vendor-specific
16#0F Identification number byte 4 Vendor-specific
16#10 Identification number byte 5 Vendor-specific
16#11 Identification number byte 6 Vendor-specific
16#12 Identification number byte 7 (LSB) Vendor-specific
16#13 Hardware version (major) Vendor-specific
16#14 Hardware version (minor) Vendor-specific
16#15 101 Version number of the current DALI standard Vendor-specific
16#16 102 Version numbers of all integrated DALI control gears Vendor-specific
16#17 103 Version numbers of all integrated DALI control devices Vendor-specific
16#18 Number of logical control units in the device Vendor-specific
16#19 Number of logical control gears in the device Vendor-specific
16#1A Index number of this logical DALI control gear or DALI control
device
Vendor-specific
16#1B…
16#7F
Reserved, not implemented
16#80…
16#FE
Additional device information Vendor-specific
16#FF Reserved, not implemented
Structure of memory bank 1:
Memory bank 1 can be used by the device vendor to store further information in the DALI device. Up to
offset 16#10 the fields are defined by IEC 62386 as follows.

Product overview
KL6821 19Version: 1.0.0
Offset Description Default values Memory
16#00 Offset of the last memory area inside the memory
bank that can be accessed.
Vendor-specific
(16#10…
16#FE)
16#01 Indicator byte Vendor-specific
16#02 Lock byte for memory bank 1. Writeable bytes
become changeable through the value 16#55. No
other values make writing possible.
16#FF
16#03 OEM GTIN byte 0 (MSB) 16#FF Lockable by byte 16#02
16#04 OEM GTIN byte 1 16#FF Lockable by byte 16#02
16#05 OEM GTIN byte 2 16#FF Lockable by byte 16#02
16#06 OEM GTIN byte 3 16#FF Lockable by byte 16#02
16#07 OEM GTIN byte 4 16#FF Lockable by byte 16#02
16#08 OEM GTIN byte 5 (LSB) 16#FF Lockable by byte 16#02
16#09 OEM Identification number byte 0 (MSB) 16#FF Lockable by byte 16#02
16#0A OEM Identification number byte 1 16#FF Lockable by byte 16#02
16#0B OEM Identification number byte 2 16#FF Lockable by byte 16#02
16#0C OEM Identification number byte 3 16#FF Lockable by byte 16#02
16#0D OEM Identification number byte 4 16#FF Lockable by byte 16#02
16#0E OEM Identification number byte 5 16#FF Lockable by byte 16#02
16#0F OEM Identification number byte 6 16#FF Lockable by byte 16#02
16#10 OEM Identification number byte 7 (LSB) 16#FF Lockable by byte 16#02
16#11…
16#FE
Additional device information Vendor-specific
16#FF Reserved, not implemented
Structure of memory banks 2 to 199:
The device vendor can use memory banks 2 to 199 to supply further parameters. The structure of the
memory banks is always as shown below. The vendor of the DALI device must be consulted regarding the
contents and the possibility to write individual bytes.
Offset Description Default values Memory
16#00 Offset of the last memory area inside the memory
bank that can be accessed.
Vendor-specific
(16#03…
16#FE)
16#01 Indicator byte Vendor-specific
16#02 Lock byte for the memory bank. Writeable bytes
become changeable through the value 16#55. No
other values make writing possible.
16#FF
16#03…
16#FE
Additional device information Vendor-specific Vendor-specific; lockable by
byte 16#02 if enabled by the
vendor
16#FF Reserved, not implemented
2.3.6 DALI-2 current
The DALI power supply of the KL6821 has a maximum output current of 250mA and a guaranteed DALI
current of 220mA.
To ensure safe operation of the DALI bus, the connected DALI devices must never consume more than the
guaranteed DALI-2 current in total.
The current consumption of the DALI devices (control gears, sensors, etc.) can be found in the
manufacturers' data sheets or on the DiiA product list (www.dali-alliance.org/products).

Product overview
KL682120 Version: 1.0.0
Furthermore, a reserve specified in IEC 62386 (guaranteed DALI current/1.2) should be maintained. This
reserve is intended for the subsequent installation of additional devices that may be added in the course of a
project.
Fig.2: DALI-2 current