BECKHOFF KL4112 User Manual
KL4112
2-Channel Analog Output Terminal 0...20 mA
Configuration Instructions
Version 2.1
2006-10-23
Contents
Contents
1. Foreword 3
Notes on the documentation 3
Safety Instructions 4
2. Technical data 5
3. Description of functions 6
4. Terminal configuration 7
5. Register description 8
General register description 8
Terminal-specific register description 11
Control/Status byte 12
Register communication KL4112 12
6. Annex 15
Mapping in the bus coupler 15
Table of the register 17
7. Support and Service 18
Beckhoff Headquarters 18
2 KL4112
Foreword
Foreword
Notes on the documentation
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 following notes and explanations are followed when installing and commissioning these components.
Liability Conditions
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.
The documentation has been prepared with care. The products described are, however, constantly under
development. For that reason the documentation is not in every case checked for consistency with performance data, standards or other characteristics. None of the statements of this manual represents a
guarantee (Garantie) in the meaning of § 443 BGB of the German Civil Code or a statement about the
contractually expected fitness for a particular purpose in the meaning of § 434 par. 1 sentence 1 BGB. In
the event that it contains technical or editorial errors, we retain the right to make alterations at any time
and without warning. 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.
Delivery conditions
In addition, the general delivery conditions of the company Beckhoff Automation GmbH apply.
Copyright
©
This documentation is copyrighted. Any reproduction or third party use of this publication, whether in
whole or in part, without the written permission of Beckhoff Automation GmbH, is forbidden.
KL4112
3
Foreword
i
Safety Instructions
State at Delivery
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.
Description of safety symbols
The following safety symbols are used in this documentation. They are intended to alert the reader to the
associated safety instructions..
This symbol is intended to highlight risks for the life or health of personnel.
Danger
This symbol is intended to highlight risks for equipment, materials or the environ-
Attention
ment.
This symbol indicates information that contributes to better understanding.
Note
4 KL4112
Technical data
13
14
RUN - LED1
A
B
C
D
O1
O2
RUN - LED2
Technical data
+O1
Power
Contacts
1
2
3
4
+ +
S
5
6
7
S
8
Shield
Top View Contact Assembly
Technical data KL4112
Number of outputs
Power supply
Signal voltage
Accuracy
Resolution
Conversion time
Electrical isolation
Current consumption from K-Bus
Bit width in the process image
Configuration
Weight approx.
Operating temperature
Storage temperature
Relative humidity
Vibration/shock resistance
EMC resistance Burst / ESD
Installation position
Type of protection
Load
+O2
+24 V
0 V
Shield
2
24 V DC via the Power contacts
0 ... 20 mA
< 500 Ω
< ± 0.1% (of the upper range value)
15 bits, configurable 16 bits
app. 3.5 ms
500 Vrms (K-Bus / signal voltage)
60 mA typ.
O: 2 x 16 bits data (2 x 8 bits control/status optional)
no address or configuration setting
80 g
0°C ... +55°C
-25°C ... +85°C
95%, no condensation
conforms to IEC 68-2-6 / IEC 68-2-27
conforms to EN 50082 (ESD, Burst) / EN 50081
any
IP20
+ O1 +O2
+24V
0V
Shield
Connection
KL4112
5
Description of functions
The process data arriving from the bus coupler is output to the process as
Input format of
process data
LED Display
Process data
Description of functions
The analog output terminal KL4112 generates output signals within the
range from 0 – 20 mA. The output current is output by the terminal with up
to 16-bit resolution. The output current is electrically isolated from the terminal bus level.
In the default setting, process data is entered in twos complement (integer
-1 corresponds to 0xFFFF).
Process data item (Hex/decimal) Output value
The two RUN LEDs indicate the operating state of the affiliated terminal
channel.
RUN LED:
On – normal operation
Off – watchdog-timer overflow has occurred. The green LEDs go off if no
process data is transferred by the bus coupler for 100 ms. The output outputs a current that is configurable by the user (see feature register).
follows.
X = Process data of the PLC
B_a,A_a = Manufacturer scaling (R17,R28)
B_h,A_h = Manufacturer scaling (R19,R20)
B_w,A_w = User scaling (R33,R34)
Y_dac = Output value to the DA converter
Neither user nor manufacturer scaling active:
Y_0 = B_a + A_a*X (1.0)
Y_dac = X
Manufacturer scaling active:
Y_1 = B_h + A_h * Y_0 (1.1)
Y_dac=Y_1
User scaling active:
Y_2 = B_w + A_w * Y_0 (1.2)
Y_dac=Y_2
Manufacturer and user scaling active:
Y_1 = B_h + A_h * Y_0 (1.3)
Y_dac = B_w + A_w * Y_1 (1.4)
The straight-line equations are activated via R32.
0x0000 (0)
0x3FFF (16383)
0x7FFF (32767)
0 mA
10 mA
20 mA
6 KL4112
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