HBM MP85A, MP85ADP, MP85A-S, MP85ADP-S Operating Manual
Operating Manual
Twin-channelAmplifiers
Modules
MP85A, MP85ADP
FASTpress
MP85A-S, MP85ADP-S
EASYswitch
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Contents Page
Contents
Safety information 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 Introduction 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Scope of supply and accessories 10. . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 General information 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 About this documentation 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 MP85A(DP)(-S) installation/removal (basic diagrams) 13. . . . . . . . . . .
2.1 Mechanical installation 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Connecting several devices 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Electrical connection 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 Overview of MP85A/MP85A-S functions 15. . . . . . . . . . . . . . . . . . . .
3.2 Overview of MP85ADP/MP85ADP-S functions 16. . . . . . . . . . . . . . .
3.3 Supply voltage and control inputs/outputs 17. . . . . . . . . . . . . . . . . . .
3.3.1 External supply voltage for control outputs 18. . . . . . . . . . . . .
3.3.2 Reference potential for control inputs / switch check inputs . .
18
3.4 Transducer 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.1 Synchronization of carrier frequencies 19. . . . . . . . . . . . . . . .
3.4.2 SGs, displacement transducers, potentiometric and LVDT
sensors 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.3 Incremental, SSI and DC sensors 22. . . . . . . . . . . . . . . . . . . .
3.4.4 Piezoelectric measurement chains 24. . . . . . . . . . . . . . . . . . .
3.5 TEDS-transducers (electronic data sheet) 27. . . . . . . . . . . . . . . . . . .
3.5.1 TEDS connection 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5.2 Parameterization with TEDS 27. . . . . . . . . . . . . . . . . . . . . . . . .
3.6 Interfaces 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.1 Ethernet interface 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.2 CAN interface 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.3 PROFIBUS interface (MP85ADP/MP85ADP-S only) 31. . . .
4 Switch settings / Replacing the battery 33. . . . . . . . . . . . . . . . . . . . . . . .
5 Starting up/Setting up mode 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1 Operation 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.1 Device settings, measured values, process status,
PROFIBUS, memory cards, error types, firmware update,
device backup 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.2 Overview of all groups and parameters 42. . . . . . . . . . . . . . . .
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5.1.3 Setting parameters on the device 44. . . . . . . . . . . . . . . . . . . . .
5.2 Hardware setup 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.1 Voltage supply / transducers 45. . . . . . . . . . . . . . . . . . . . . . . . .
5.2.2 Establishing the Ethernet connection 46. . . . . . . . . . . . . . . . .
5.2.3 Connecting the CAN adapter (USB) 47. . . . . . . . . . . . . . . . . .
5.3 Installing the PME Assistant software 47. . . . . . . . . . . . . . . . . . . . . . .
5.4 PME Assistant operation 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4.1 Using the Ethernet interface 48. . . . . . . . . . . . . . . . . . . . . . . . .
5.4.2 Using the USB interface 49. . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.5 Automatic version recognition 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.6 Firmware update 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.7 Offline operation 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 Methods of measurement 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1 Data reduction 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2 Classification 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.3 Monitoring limit values in real time 53. . . . . . . . . . . . . . . . . . . . . . . . .
6.4 Masking out external tolerances 54. . . . . . . . . . . . . . . . . . . . . . . . . . .
6.5 Evaluation criteria 54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.6 Measurement programs (parameter sets) 58. . . . . . . . . . . . . . . . . . .
7 Switch checker with MP85A(DP)-S EASYswitch 60. . . . . . . . . . . . . . . .
7.1 Switch check 60. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.2 Haptic check 62. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8 Communication with a control system 63. . . . . . . . . . . . . . . . . . . . . . . . .
8.1 MP85A process controller in machine control 63. . . . . . . . . . . . . . . .
8.2 Test process sequence over time 65. . . . . . . . . . . . . . . . . . . . . . . . . .
8.3 Transducer test 67. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.4 Zero balance 68. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.5 Simulation of digital outputs 68. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.6 Parameter sets (measurement programs) 69. . . . . . . . . . . . . . . . . . .
8.7 Evaluation/storage process times 71. . . . . . . . . . . . . . . . . . . . . . . . . .
8.8 Process data storage/production data management 73. . . . . . . . . .
9 Display-and control options 76. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9.1 DT85 control and display terminal 76. . . . . . . . . . . . . . . . . . . . . . . . . .
9.2 FASTpress Suite software 77. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 Error messages/operating state (LED display) 79. . . . . . . . . . . . . . . . . .
11 Technical support 83. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Safety information
This operating manual applies to the devices
• MP85A
• MP85ADP
• MP85A-S
• MP85ADP-S
The designation MP85A process controller will be used for all devices in this
manual. If text/data refers only to specific devices, this will be clearly indicated
in the text and one of the above designations used.
• Use shielded, low-capacitance HBM cables only.
Intended use
The MP85A process controller is to be used exclusively for measurement
tasks and directly related control tasks. Use for any purpose other than the
above is deemed to be non-designated use. In the interests of safety, the
device should only be operated as described in the Operating Manuals. It is
also essential to comply with the legal and safety requirements for the application concerned during use. The same applies to the use of accessories.
Each time, before commissioning the device, you must first run a project planning and risk analysis that takes into account all the safety aspects of automation technology. This particularly concerns personal and machine protection.
Additional safety precautions must be taken in plants where malfunctions
could cause major damage, loss of data or even personal injury. In the event
of a fault, these precautions must establish safe operating conditions.
This can be done, for example, by mechanical interlocking, error signaling,
limit value switches, etc.
The MP85A process controller must not be connected directly to the
mains. The supply voltage must be 18 − 30 V.
General dangers of failing to follow the safety instructions
The MP85A process controller corresponds to the state of the art and is
failsafe. The device may give rise to residual dangers if it is inappropriately
installed and operated by untrained personnel.
Any person instructed to carry out installation, commissioning, maintenance or
repair of the device must have read and understood the Operating Manual
and in particular the technical safety instructions.
Conditions at the place of installation
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Protect the device from direct contact with water (IP20).
Maintenance and cleaning
The MP85A process controller is maintenance-free. Please note the following
points when cleaning the housing:
− Before cleaning, disconnect the device from the power supply.
− Clean the housing with a soft, slightly damp (not wet!) cloth. You should
never use solvent, since this could damage the labeling on the front panel
and the display.
− When cleaning, ensure that no liquid gets into the device or connections.
Residual risks
The scope of supply and performance of the MP85A process controller covers
only a small area of measurement technology. In addition, equipment planners, installers and operators should plan, implement and respond to the
safety engineering considerations of measurement technology in such a way
as to minimize remaining dangers.
Prevailing regulations must be complied with at all times. There must be reference to the remaining dangers connected with measurement technology. After
making settings and carrying out activities that are password-protected, you
must make sure that any controls that may be connected remain in safe
condition until the switching performance of the measurement system has
been tested.
Any risk of remaining dangers when working with the MP85A.process
controller is pointed out in these instructions by means of the following
symbols:
MP85A process controller
Symbol:
Meaning: Dangerous situation
Warns of a potentially dangerous situation in which failure to comply with
safety requirements can lead to death or serious physical injury.
Symbol:
Meaning: Possibly dangerous situation
Warns of a potentially dangerous situation in which failure to comply with
safety requirements could lead to damage to property and slight or moderate
physical injury.
WARNING
CAUTION
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Symbols for application instructions and useful information:
7
Symbol:
Means that important information about the product or its handling is being
given.
Symbol:
Meaning: Statutory waste disposal mark
In accordance with national and local environmental protection and material
recovery and recycling regulations, old devices that can no longer be used
must be disposed of separately and not with normal household garbage. If
you need more information about waste disposal, please contact your local
authorities or the dealer from whom you purchased the product.
Symbol:
Meaning: CE mark
NOTE
The CE mark enables the manufacturer to guarantee that the product
complies with the requirements of the relevant EC directives (the Declaration
of Conformity can be found at http://www.hbm.com/HBMdoc).
Working safely
Error messages should only be acknowledged once the cause of the error is
removed and no further danger exists.
The device complies with the safety requirements of DIN EN 61010 Part 1
(VDE 0411 Part 1).
The device must be mounted on a DIN support rail connected to grounded
conductor potential. Both the support rail and the MP85A process controller
must be free of paint, varnish and dirt at the point of installation.
To ensure adequate immunity from interference, the bus cables (CAN and for
MP85ADP, PROFIBUS DP) must be shielded, twisted-pair lines. The transducer cables must also be shielded. The shield of each transducer cable must
be connected at the MP85A process controller via as short a line as possible
(t5 cm) and a flat connector (4.8 mm; “Faston”).
The power supply and digital control input and output connection cables only
need to be shielded if the cables are longer than 30 m or are routed outside
closed buildings.
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MP85A process controller
When connecting cables (fitting and extracting terminals) and when changing
the MMC/SD Card, measures must be taken to prevent electrostatic
discharge which could damage the electronics.
The MP85A process controller must be operated with a separated extra-low
voltage (18 … 30 V DC supply voltage), which usually supplies one or more
consumers within a control cabinet.
1)
Should the device be operated on a DC voltage network
, additional precau-
tions must be taken to discharge excess voltages.
Conversions and modifications
The MP85A process controller must not be modified from the design or safety
engineering point of view except with our express agreement. Any modification shall exclude all liability on our part for any damage resulting therefrom.
In particular, any repair or soldering work on motherboards is prohibited.
When exchanging complete modules, use only original parts from HBM.
The device is delivered from the factory with a fixed hardware and software
configuration. Changes can only be made within the possibilities documented
in the manuals.
Qualified personnel
Qualified personnel means persons entrusted with siting, mounting, starting
up and operating the product, who possess the appropriate qualifications for
their function.
This device is only to be installed and used by qualified personnel strictly in
accordance with the specifications and with the safety rules and regulations
which follow.
This includes people who meet at least one of the three following requirements:
• Knowledge of the safety concepts of automation technology is a require-
ment and as project personnel, you must be familiar with these concepts.
• As automation plant operating personnel, you have been instructed how to
handle the machinery and are familiar with the operation of the equipment
and technologies described in this documentation.
• As commissioning engineers or service engineers, you have successfully
completed the training to qualify you to repair the automation systems. You
are also authorized to activate, ground and label circuits and equipment in
accordance with safety engineering standards.
1)
Distribution system for electrical energy with greater physical dilatation (over several control cabinets, for
example) that may possibly also supply consumers with high nominal (rated) currents.
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It is also essential to comply with the legal and safety requirements for the
application concerned during use. The same applies to the use of
accessories.
Maintenance and repair work on an open device with the power on must only
be carried out by trained personnel who are aware of the dangers involved.
9
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1 Introduction
1.1 Scope of supply and accessories
Scope of supply:
• 1 MP85A or MP85ADP, MP85A-S or MP85ADP-S
• 4 plug-in screw terminals, coded
Phoenix order number HBM order number
MP85A process controller
1x voltage supply and CAN,
6-pin
2x transducers, 8-pin MCVW 1.5/8-ST-3.81 GY 3-3312.0422
1x I/O 1, 8-pin MC 1.5/8-ST-3.5 GY 3-3312.0421
MV STBW 2.5/6-ST-5.08 GY 3-3312.0426
Additionally for MP85A or MP85A-S:
Phoenix order number HBM order number
1x I/O 2, 8-pin MC 1.5/8-ST-3.5GY 3-3312.0421
• Extra spring for enclosure assembly (included in the pack)
• Flat ribbon cable female connector, 10-pin
• 1 FASTpress Suite system CD with:
free PME Assistant setup software
Online Help with Tricks & Tips
Quick Reference Guide for beginners
• PME-Assistant PLUS (demo-version software-add-on modules) with:
EASYsetup (user administration) and EASYteach (statistical process
analysis)
• MP85A Toolkit (demo version):
Function module kit for creating separate interfaces on operator panels via
Ethernet under Windows XP, Windows CE and WindowsMobile
• EASYmonitor CE:
Production software (demo-version, for operation on Touch-Panels under
Windows CE)
• INDUSTRYmonitor (demo version):
Production software for operation on Touch-Panels with max. 12 MP85A
process controllers
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Accessories:
• DT85: 1/4” VGA b/w display for visualization and parameterization of
several MP85A.process controllers via the CAN interface
• Memory card: MMC or SD Card, e.g. Transcend (www.transcend.de), no
SDHC (High Capacity), SDXC (eXtended Capacity), SecureMMC or
equivalent cards
• Standard flat ribbon cable, 10-pin, 1.27 mm pitch
• Ethernet crossover cable, 2 m, (1-KAB239-2)
1.2 General information
The MP85A process controller from the PME product line is a twin-channel
amplifier, suitable for connecting transducers of different technologies. The
MP85ADP and MP85ADP-S also have a PROFIBUS interface in addition to
the ETHERNET and CAN interfaces.
11
"10V
SSI
Carrier-frequency bridge
excitation voltage 4.8 kHz
Power supply for active
transducers 5 V or 24 V
A
D
Intelligent signal conditioning
and powerful algorithms for
A
D
Keyboard and
display
monitoring fitting
memory card
MP85A(DP)/MP85A(DP)-S
Voltage supply,
electrically isolated
EEPROM
MMC/SD
μP
24 V
Control inputs and
outputs, or switch test
inputs
CANopen interface
Ethernet interface
PROFIBUS DP interface
(for MP85ADP and
MP85ADP-S)
Fig. 1.1: Block diagram of the MP85A process controller
The PME Assistant provides a simple and free user interface for device parameterization under MS Windows.
This needs an Ethernet (crossover) cable (order no. 1-KAB2392) for direction
connection to a PC or a USB → CAN interface converter (when using a CAN
interface), which must be ordered separately (order number: 1-PMESETUPUSB).
All device parameters can be set with this software. The Ethernet or CAN bus
interface is set directly at the device.
Other devices in the PME product family can also be set up with this software
(MP01 ... MP70).
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MP85A process controller
1.3 About this documentation
MP85A process controller documentation comprises
− this operating manual, which mainly describes setting up the hardware
(transducer, device and PC with software).
− PME Assistant online Help and add-on software modules
describing device setup and function via software
− a separate operating manual with an object dictionary and an interface
description for Ethernet, CAN and PROFIBUS communication
− a quick start guide for fast commissioning of the MP85A process controller
and all software modules
− a quick start guide for the whole FASTpress suite, i.e. for all software
modules and the MP85A process controller
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2 MP85A(DP)(-S) installation/removal (basic diagrams)
2.1 Mechanical installation
13
Fig. 2.1: Mounting on a DIN rail
Fig. 2.2: Removal
CAUTION
The DIN rail must be connected to grounded conductor potential .
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MP85A process controller
Fig. 2.3: Fitting a second spring for a more stable MP85A process controller
mounting on the DIN rail
2.2 Connecting several devices
Flat ribbon cable female connector
Subsequent devices are
interconnected via this
connector.
1.
3.
Color-coding on
Pin 1
2.
58 mm
Recommended gap for
flat ribbon cable female
connectors
Fig. 2.4: Connecting the flat ribbon cable
Up to four MP85A process controllers can be connected via one flat ribbon
cable. This cable takes care of local supply voltage, CAN bus connection and
carrier frequency synchronization between the devices.
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3 Electrical connection
WARNING
Comply with the safety instructions before starting up the device.
3.1 Overview of MP85A/MP85A-S functions
Local connection of CAN bus, supply voltage and synchronization between
modules
LED 1
LED 2
Screw terminal 1:
Voltage supply and CAN bus,
synchronization
Screw terminal 2: (same assignment as
screw terminal 1)
CAN adapter for PC/laptop connection,
parameterization via CAN bus
2-line LC display
Control keys
Module for MultiMediaCard (MMC) /
SD Card
15
Screw terminal 4:
4 electrically isolated control input or
switch-check inputs (24 V level,
relative to input ground screw terminal
3)
4 electrically isolated control outputs
(24 V level, power supply via screw
terminal 3)
Screw terminal 5:
Transducer connection channel x
Connection 7:
RJ45 socket for Ethernet
connection (see Page 46)
Screw terminal 3:
1 electrically isolated control input or switch test input (24 V level) incl. input
ground,
4 electrically isolated control outputs (24 V level), external supply feed for
control outputs and incremental or SSI transducers
including transducer excitation
Cable shield connection for
transducers
Screw terminal 6:
Transducer connection channel y
including transducer excitation
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3.2 Overview of MP85ADP/MP85ADP-S functions
Local connection of CAN bus, supply voltage and synchronization between modules
Screw terminal 1:
Voltage supply and CAN bus,
synchronization
LED 1
LED 2
Screw terminal 2: (same assignment as
screw terminal 1)
CAN adapter for PC/laptop connection,
parameterization via CAN bus
2-line LC display
Control keys
Module for MultiMediaCard
(MMC) / SD Card
Connection 4:
9-pin sub-D socket for
PROFIBUS DP
connection
Screw terminal 5:
Transducer connection channel x
including transducer excitation
Cable shield connection for
Connection 7:
RJ45 socket for Ethernet
connection (see Page 46)
Screw terminal 3:
1 electrically isolated control input or switch test input (24 V level) incl. input
ground,
4 electrically isolated control outputs (24 V level), external supply feed for
control outputs and incremental or SSI transducers
transducers
Screw terminal 6:
Transducer connection channel y
including transducer excitation
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3.3 Supply voltage and control inputs/outputs
Four (MP85A/MP85A-S) or three (MP85ADP/MP85ADP-S) plug-in screw
terminals are available for connecting the power supply and the control inputs
and outputs. Control input/output functionality can be freely assigned with the
PME Assistant (menu: Digital inputs/outputs).
Connecting the power
supply:
The MP85A process controller must be connected to an
external supply voltage of 18−30 V (24 V
D Attach wire end sleeves to the voltage supply wire ends.
D Screw the wire ends to screw terminal 1.
D Insert the screw terminal into the top socket.
D Switch on the voltage supply.
Screw terminal 2
(CAN adapter; assignment as for
screw terminal 1)
WARNING
Labeling
nom
CAN
0 V
LH
).
24 V
SYNC
Screw terminal 3
(control inputs/outputs,
switch test inputs)
Out 1
Out 2
Out 3
Out 4
0 V
24 V
IN 1
IN
IN = digital input OUT = digital output
CAUTION
1
2
OUT
3
4
0V
24V
1
IN
Should the mains power fail in the MP85A process controller,
Screw terminal 4 (MP85A(-S))
(control inputs/outputs, switch test inputs)
Out 5
Out 6
Out 7
Out 8
Screw terminal 1
(CAN bus voltage supply,
synchronization)
5
6
OUT
7
8
IN 2
IN 3
IN 4
IN 5
2
3
IN
4
5
all control outputs will be set to 0 V.
Fig. 3.1: Screw terminal assignment
The screw terminals are coded to stop them being fitted into the wrong
socket. The sockets have coding tabs, screw terminals 1 and 2 have coding
pins.
The coding lugs are broken off for screw terminals 3 and 4. The contact
spacing is also different in each case for screw terminals 3 and 4, as well as 5
and 6.
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3.3.1 External supply voltage for control outputs
Example: PLC connection (p-switched)
MP85A process controller
MP85A process controller
Screw terminal 3
OUT3
OUT1
24 V*
0 V*
max. 0.5 A
PLC
Relay
max. 0.5 A
24 V
0 V*
Fig. 3.2: Connection to a PLC
The control outputs are available at screw terminals 3 and 4 and are electrically isolated from the internal supply voltage:
• at screw terminal 3: control outputs 1...4
• at screw terminal 4: control outputs 5...8 (MP85A(-S) only)
)
*
The control outputs must be supplied with an external voltage (ground and
24 V) via screw terminal 3. This external voltage is electrically isolated
from the measurement ground.
3.3.2 Reference potential for control inputs / switch test inputs
MP85A process controller
Screw terminal 3
IN 3
IN
Fig. 3.3: Connection of control input / switch test input
Switch event / test specimen
24 V (10 ... 30 V)
0 V
The control inputs are available at screw terminals 3 and 4 and are electric-
ally isolated from the internal supply voltage and from the control outputs.
• at screw terminal 3: control input 1
• at screw terminal 4: Control inputs 2...5 (MP85A/MP85A-S only)
An external reference potential (
IN ), to which the control input signals relate,
must be connected for the control inputs.
The MP85A process controller digital inputs are flank controlled by
transition from 0V to control voltage (e. g. 24V). The set digital input
function is only implemented once with the rising flank. The subsequent
permanent application of the control voltage does not cause a further
action.
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3.4 Transducer
Two transducers can be connected to screw terminals 5 and 6, independently
of one another. The two measurement channels are parameterized using the
PME Assistant (menu: Transducer).
3.4.1 Synchronization of carrier frequencies
Synchronization prevents interferences occurring due to small differences in
the carrier frequencies of the individual amplifiers, i.e that amplifiers disturb
each other.
Synchronization is advisable for transducers with carrier frequency excitation
when
D the transducer cables of several devices run side by side
D the measuring points are unshielded and are close together
Even if devices work without a CAN bus, the flat ribbon cable should always
be used for synchronization between them, see Section 2.2 on Page 14.
WARNING
To synchronize several devices, declare one device as master and set all
other devices as slaves. Setting is implemented via the PME Assistant
program (menu: Basic settings −> Hardware synchronization).
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MP85A process controller
3.4.2 SGs, displacement transducers, potentiometric and LVDT sensors
In “carrier-frequency amplifier” mode, the following transducer types can be
connected:
Screw terminals 5 and 6
for transducer connection
SENSOR X
18
SENSOR Y
18
SG and inductive full bridges,
piezoresistive transducers
wh
Measurement signal (+)
bk
Bridge excitation
voltage (−)
rd
Measurement signal (−)
bu
Bridge excitation
gn
voltage (+)
Sense lead (+)
gy
Sense lead (−)
ye
Cable shield
MP85A(-S)
1
2
6
4
5
3
Hsg.
MP85ADP(-S)
SG and inductive half bridges
wh
Measurement
signal (+)
bk
Bridge excitation
voltage (−)
bu
Bridge excitation
voltage (+)
gn
Sense lead (+)
gy
Sense lead (−)
ye
Cable shield
1
2
4
5
3
Hsg.
Potentiometric transducers
Measurement
signal (+)
Bridge excitation
2
1
3
voltage (−)
Bridge excitation
voltage (+)
Cable shield
Sense lead (+)
Sense lead (−)
*)
1
2
4
Hsg.
5
3
LVDT transducer
Measurement
signal (+)
Bridge excitation
voltage (−)
Bridge excitation
voltage (+)
Measurement
signal (−)
Cable shield
Sense lead (+)
Sense lead (−)
1
2
4
6
Hsg.
5
3
Cable color code:
wh= white; bk= black; bu= blue; rd= red; ye = yellow; gn= green; gy= gray
*)
half bridge function
Fig. 3.4: Connecting different transducers in “carrier-frequency amplifier” mode
When connecting a transducer in four-wire configuration, the sense lines must
be connected to the appropriate bridge excitation circuit (Pin 3 with Pin 2 and
Pin 5 with Pin 4). With cable lengths >50 m, a resistor with half the value of
the bridge resistance (RB/2) must be connected instead in each sense lead of
the transducer.
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MP85A process controller
If the transducers are calibrated in a six-wire circuit, resistors must be activated directly into the sense lead if cable lengths are >50 m.
21
Four-wire connection:
full bridge
wh
bk
rd
bu
ye
1
2
4
5
3
Hsg
6
.
Four-wire connection:
half bridge
wh
bk
bu
gn
gy
ye
1
2
6
4
5
3
Hsg
.
Feedback bridges for four-wire configuration
Cable color code: wh= white; bk= black; bu= blue; rd= red; ye = yellow; gn= green; gy=
gray
Fig. 3.5: Transducer connection in a four-wire-configuration
NOTE
Use standard HBM cables or other shielded, low-capacitance measurement cables for connecting the transducers. Connect the shield of each
transducer cable via as short a line as possible (t5 cm) and a flat
connector (4.8 mm; “Faston”) on the right next to screw terminal 6.
Otherwise EMC protection is not ensured.
CAUTION
Line break detection
MP85A process controllers have line break detection for the connected transducers.
The excitation voltage lines and the measurement signal leads are monitored.
With sense leads, a wire break is only reported as a fault if both lines are
broken; with measurement signal leads and excitation voltage leads, the
break of a single line is also reported as a fault. When a single wire breaks in
a sense lead, the measured value displayed is too high.
This also means that if the connection is faulty (for example, when full bridges
or half bridges are connected in four-wire configuration and the feedback
bridges are missing) an error message appears (display: Transducer error).
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MP85A process controller
3.4.3 Incremental, SSI and DC sensors
In “Incremental encoder, SSI transducer or DC voltage transducer” mode, the
following transducer types can be connected:
MP85A(-S)
MP85ADP(-S)
Pulse counters, incremental transducers (symmetrical signals, TTL level, 5V)
Ground
f1, 0
f1, 0
f2, 90
f2, 90
o
o
o
o
Measurement signal F1 (+), 0°
Measurement signal F1 (−), 0°
Cable shield
Measurement signal F2 (+), 90°
Measurement signal F2 (−), 90°
Zero index, Ix (+)
Zero index, Ix (−)
Supply voltage +5 V/+24 V
Hsg.
7
6
1
5
3
4
2
8
Transducers with an SSI interface (symmetrical signals, TTL level, 5V)
Ground
Clock, Cl (+)
Clock, Cl (−)
Cable shield
Data, D (+)
Data, D (−)
Supply voltage +5 V/+24 V
DC voltage sources ("10 V)
U
Measureme
nt signal (+)
Measureme
nt signal (−)
Cable shield
7
6
1
Hsg.
5
3
8
5
3
Hs
g.
Fig. 3.6: Active transducer connection
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MP85A process controller
23
A supply voltage is available at screw terminals 5 and 6, pins 7 and 8 for
feeding incremental encoders, transducers with an SSI interface and sensors
with voltage signal.
An internal or external power supply can be selected via switch S1. The
device must be open to do this (see Chapter 4).
• Transducer supplied from MP85A process controller:
Transducer supply voltage 5 V "10%, 150 mA max. (for both channels
together). The power supply is then not electrically isolated from the meas-
urement system.
• Transducer supplied from an external power pack:
At screw terminal 3, pins 5 and 6, a voltage of between 10 … 30V
DC
(nominally 24VDC), is supplied, including ground. A current of max. 300 mA
(for both channels together) can then be drawn at screw terminals 5 and 6,
pins 7 and 8.
This external supply voltage is electrically isolated from the measurement
ground and simultaneously feeds the digital control outputs.
Screw terminal 3
GND_int 5 V_int
external
power
supply
GND_ext
24 V_ext
5
6
S1
Internal MP85A
connection
78
Screw terminal 5
GND +5 V (int) / 24 V (ext.)
Screw terminal 6
78
Fig. 3.7: Active transducer power supply (basic diagram)
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24
MP85A process controller
CAUTION
The differential signal of the measurement signal and the zero index signal must each be minimum 1.2 V.
The voltage to measurement ground must not exceed 14 V in any line. If
necessary, the voltage must be reduced via a voltage divider.
3.4.4 Piezoelectric measurement chains
The inline charge amplifier model CMA or CMD is required for operating
piezoelectric sensors on the MP85A process controller. The charge amplifier
is supplied externally with 24 VDC and is available from Pin 7 and 8 of the
screw terminals 5 and 6 of the MP85A process controller (see Chapter 3.4.3,
Active sensors, Fig. 3.7).
Internal or external voltage in the MP85A process controller can be selected
via switch S1. The device must be opened to do this (see Chapter 4) and the
switch S1 set to “24V external”.
Supply voltage
Piezoelectric
force transducer
CMA charge amplifier
18 to 30 V
0 V
DC
RANGE 1 / RANGE 2
MEASURE / RESET
Output voltage
−10 ... +10 V
0 V
DC
TEDS
DC
DC
Fig. 3.8: Block diagram of the piezoelectric measurement chain
The MP85A process controller measurement channel must be set to 10 V
(PME Assistant menu: Transducer). A reset on the charge amplifier must be
carried out before starting a measurement (Pin 3) MEASURE / RESET. With
an input voltage of 0 V at PIN 3, the charge amplifier is in the measurement
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MP85A process controller
25
mode MEASURE. If a voltage of 24 V is present at PIN 3, the charge amplifier
switches to RESET.
TIP:
The reset signal can be generated externally or via the MP85A process
controller. To do this, the process signal “Reset piezo sensor” must be set to a
digital output of the MP85A process controller (PME Assistant, menu: Digital
outputs, circuit logic: positive).
TEDS:
The charge amplifiers have TEDS functionality for the voltage input which is
available in MP85A process controller from hardware version V1.07. When
operating without TEDS, the measurement ground (charge amplifier, Pin 6)
must be connected directly to Pin 3 of the MP85A process controller. The
yellow cable (TEDS) is therefore not required.
The charge amplifier has a measuring range selection RANGE1 / RANGE2.
Selection is via Pin 2 of the charge amplifier. The switching signal can be
supplied by an external control or the digital inputs of the MP85A process
controller. If a voltage of 0 V is present at Pin 2, measuring range 1 (100%
F
) is active at the charge amplifier.
nom
TIP:
The CMA charge amplifier gives you the option to zoom into a second measuring range (20% of the nominal (rated) force = 100% output span). A voltage
of 24 V
must be applied at PIN 2 for this.
DC
The changed measuring range must also be set in the MP85A process
controller, either automatically via the TEDS function or using the scaling
option of the input channel.
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26
MP85A process controller
Supply voltage 0 V (GND).....
RANGE 1 / RANGE 2 (CMA only).....
MEASURE / RESET.....
TEDS.....
Output signal −10 ... +10 V.....
Measurement ground.....
Do not assign !.....
Supply voltage 18 to 30 V DC
M12 x 1, 8-pin
1)
Operating on a SELV circuit (separated extra-low voltage)
1)
1
2
3
4
5
6
7
8
.....
CMA/CMD
MP85A process controller digital OUT (Reset piezo
sensor); screw terminal 3 or 4 (output)
white
yellow
gray
pink
red
MP85A process controller
Sensor x/y
(Screw terminals 5 and 6)
7
3
5
2
8
Fig. 3.9: Connection of the piezoelectric charge amplifier CMA/CMD
CAUTION
After RESET, the charge amplifier output is set to zero, but this does not
mean that the machine generating the force is force-free. Make sure that
the force transducer is not overloaded, even though the output signal is
still in the −10 − +10 V range.
Once all the force is removed, a negative voltage signal is present with
the value of the voltage output for a RESET, without having to RESET
again.
Detailed information can be found in the operating manual “PACEline
piezoelectric force measurement chain CMC”.
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