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KM3701
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Beckhoff KM3701, KM3702, KM3712 Documentation

Documentation
KM3701, KM3702 and KM3712
Pressure Measuring Module
Version: Date:
2.0.0 2017-11-20

Table of contents

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 KM3701 - Introduction .................................................................................................................... 8
2.2 KM3702 - Introduction .................................................................................................................... 9
2.3 KM3712 - Introduction .................................................................................................................. 10
2.4 Technical data .............................................................................................................................. 11
2.5 Basic function principles ............................................................................................................... 12
2.6 LED displays................................................................................................................................. 15
3 Mounting and wiring ...............................................................................................................................16
3.1 Recommended mounting rails ...................................................................................................... 16
3.2 Mounting and demounting - terminals with front unlocking........................................................... 16
3.3 Connection.................................................................................................................................... 18
4 Application examples..............................................................................................................................19
4.1 KM3701 - Application examples ................................................................................................... 19
4.2 KM3702 - Application example ..................................................................................................... 20
4.3 KM3712 - Application example ..................................................................................................... 21
5 KS2000 Configuration software .............................................................................................................22
5.1 KS2000 - Introduction ................................................................................................................... 22
5.2 Parameterization with KS2000 ..................................................................................................... 23
5.3 Register ........................................................................................................................................ 25
5.4 Process Data ................................................................................................................................ 26
6 Access from the user programm ...........................................................................................................27
6.1 KM3701 - Process image ............................................................................................................. 27
6.2 KM3702, KM3712 - Process image .............................................................................................. 27
6.3 Control and Status Byte................................................................................................................ 28
6.4 Register overview ......................................................................................................................... 30
6.5 Register description ...................................................................................................................... 32
6.6 Examples of Register Communication.......................................................................................... 35
6.6.1 Example 1: reading the firmware version from Register 9 ...............................................35
6.6.2 Example 2: Writing to an user register.............................................................................35
7 Appendix ..................................................................................................................................................38
7.1 Support and Service ..................................................................................................................... 38
Table of contents
KM3701, KM3702 and KM37124 Version: 2.0.0
Foreword

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

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
WARNING
CAUTION
Attention
Note
Serious risk of injury!
Failure to follow the safety instructions associated with this symbol directly endangers the life and health of persons.
Risk of injury!
Failure to follow the safety instructions associated with this symbol endangers the life and health of persons.
Personal injuries!
Failure to follow the safety instructions associated with this symbol can lead to injuries to persons.
Damage to the environment or devices
Failure to follow the instructions associated with this symbol can lead to damage to the en­vironment or equipment.
Tip or pointer
This symbol indicates information that contributes to better understanding.
KM3701, KM3702 and KM37126 Version: 2.0.0

1.3 Documentation issue status

Version Comment
2.0.0 • Corrections
• First public issue as PDF
1.2.0 • Technical data updated
• Installation and wiring extended
• Process data corrected
• KM3701-0340 added
1.1.1 Application examples update
1.1.0 Technical data updated
1.0.0 First release
Firmware and hardware versions
Foreword
Documentation Version
2.0.0 1G 09 1D 07 1E 09
1.2.0 1C 01 1B 01 1B 01
1.1.1 1C 00 1B 00 1B 00
1.1.0 1B 00 1A 00 1A 00
1.0.0 1B 00 1A 00 1A 00
The firmware and hardware versions (delivery state) can be taken from the serial number printed on the side of the terminal module.
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.: 35 05 00 01:
35 - week of production 35 05 - year of production 2005 00 - firmware version 00 01 - hardware version 01
KM3701-0000, KM3701-0340 KM3702-0000 KM3712-0000
Firmware Hardware Firmware Hardware Firmware Hardware
Product overview

2 Product overview

2.1 KM3701 - Introduction

Fig.1: KM3701
Single-channel differential pressure measuring module
The KM3701 differential pressure measuring module enables direct measurement of pressure differences between two hose connections. The pressure difference is available in the fieldbus with 16-bit resolution. The measuring range is between -100hPa and +100hPa (-100mbar to +100mbar). The status LEDs indicate proper function or errors such as range exceedance.
Two variants are available:
• KM3701-0000: Measuring range -100 to +100hPa (-100 to +100mbar)
• KM3701-0340: Measuring range -340 to +340hPa (-340 to +340mbar)
Quick links
• Mounting and wiring [}16]
• Access from the user program [}27]
• Application examples [}19]
KM3701, KM3702 and KM37128 Version: 2.0.0

2.2 KM3702 - Introduction

Product overview
Fig.2: KM3702
Two-channel relative pressure measuring module for 0 to 7500hPa (0 to 7.5bar)
The relative pressure measuring module KM3702 enables direct measurement of two pressure values at the hose connections. The pressure is determined as the difference to the environment of the KM3702 and is available in the fieldbus with 16bit resolution. The status LEDs indicate proper function or errors such as range exceedance.
Product overview

2.3 KM3712 - Introduction

Fig.3: KM3712
Dual channel relative pressure measuring module for -1,000hPa to +1,000hPa (-1bar to +1bar)
The relative pressure measuring module KM3712 allows the direct measurement of two negative pressure values on the hose connections. The pressure is determined as the difference to the environment of the KM3712 and is available in the fieldbus with 16bit resolution. The status LEDs indicate proper function or errors such as range exceedance.
KM3701, KM3702 and KM371210 Version: 2.0.0
Product overview

2.4 Technical data

Technical Data KM3701-0000 KM3701-0340 KM3702-0000 KM3712-0000
Number of inputs 1 (differential pressure) 2 2
Measuring range -100 to +100hPa
(-100 to +100mbar)
Permissible overpressure max. ±500hPa differential
max. +5000hPa relative to ambient
permissible media non-aggressive gases
Resolution 0.1hPa (0.1mbar) per digit 1hPa (1mbar)
Measuring accuracy 3% (of the full scale value)
Measuring speed typically 5ms
Pressure connectors
Power supply for the electronics
Current consumption from the K-bus
Width of a bus terminal block
Electrical isolation 500V (K-bus/signal voltage)
Bit width in the input process image
Bit width in the output process image
Dimensions without tubes (wxhxd)
Weight approx. 100g
Permissible ambient temperature range during operation
Permissible ambient temperature range during storage
Permissible relative air humidity
Mounting [}16] on a 35mm mounting rail [}16] (e.g.DIN rail TH 35-7.5 conforming to EN
Vibration / shock resistance
EMC immunity/emission conforms to EN 61000-6-2 / EN 61000-6-4
Protection class IP20
Installation position variable
Approval CE, cULus
screwing plug [}18], M12 x 1
via the K-bus
typically 15mA
Maximum 64 standard Bus Terminals or 80cm (a KM37xx is equivalent to 2 standard Bus Terminals)
3byte 3byte 6byte 6byte
3byte 3byte 6byte 6byte
approx. 26.5mmx100mmx69mm (width aligned: 24mm)
0°C ... + 55°C
-25°C ... + 85°C
95%, no condensation
60715)
conforms to EN 60068-2-6 / EN 60068-2-27
-340 to +340hPa (-340 to +340mbar)
0 to 7500hPa (0 to 7.5bar)
+10000hPa +5000hPa
per digit
-1000 to +1000hPa (-1 to +1bar)
1hPa (1mbar) per digit
Product overview

2.5 Basic function principles

Fig.4: Bus Terminal block with pressure measuring modules
The pressure measuring modules KM3701 and KM3712 directly record differential and relative pressures in non-aggressive gases. As in electronic signal acquisition the pressure measurement takes place via a terminal module. The pressure measuring modules convert the measured pressure into an electrical signal and make it available to the higher-level controller with a resolution of 16bits. The measuring principle is based on the most up-to-date on-chip sensor technology. In addition to just measuring, the semiconductor also executes other functions, such as temperature compensation and avoidance of long-term drift. The status LEDs indicate proper function or errors such as range exceedance.
KM3701, KM3702 and KM371212 Version: 2.0.0
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