HBM MP85A User manual

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Twin-channel-
Amplifiers
Modules
MP85A, MP85ADP
FASTpress
MP85A-S, MP85ADP-S
EASYswitch
Operating Manual

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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 applic-
ation concerned during use. The same applies to the use of accessories.
Each time, before commissioning the device, you must first run a project plan-
ning and risk analysis that takes into account all the safety aspects of automa-
tion 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 plan-
ners, 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 refer-
ence 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:
Symbol: WARNING
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: CAUTION
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.

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Symbols for application instructions and useful information:
Symbol: NOTE
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
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 trans-
ducer 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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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.
Should the device be operated on a DC voltage network1), 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 modifica-
tion 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 require-
ments:
•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.

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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
1x voltage supply and CAN,
6-pin
MV STBW 2.5/6-ST-5.08 GY 3-3312.0426
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
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.
μP
ADIntelligent signal conditioning
and powerful algorithms for
monitoring fitting
Keyboard and
display
Carrier-frequency bridge
excitation voltage 4.8 kHz
Voltage supply,
electrically isolated
PROFIBUS DP interface
(for MP85ADP and
MP85ADP-S)
AD
MMC/SD
memory card
Power supply for active
transducers 5 V or 24 V
SSI
"10V
CANopen interface
MP85A(DP)/MP85A(DP)-S
Control inputs and
outputs, or switch test
inputs
24 V
Ethernet interface
EEPROM
Fig. 1.1: Block diagram of the MP85A process controller
The PME Assistant provides a simple and free user interface for device para-
meterization 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-PMESETUP-
USB).
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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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
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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Fig. 2.3: Fitting a second spring for a more stable MP85A process controller
mounting on the DIN rail
2.2 Connecting several devices
1.
2.
3.
Color-coding on
Pin 1
Flat ribbon cable female connector
Recommended gap for
flat ribbon cable female
connectors
Subsequent devices are
interconnected via this
connector.
58 mm
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
Screw terminal 1:
Voltage supply and CAN bus,
synchronization
Screw terminal 5:
Transducer connection channel x
including transducer excitation
Control keys
2-line LC display
Screw terminal 2: (same assignment as
screw terminal 1)
CAN adapter for PC/laptop connection,
parameterization via CAN bus
Screw terminal 6:
Transducer connection channel y
including transducer excitation
LED 1
Local connection of CAN bus, supply voltage and synchronization between
modules
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 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
Cable shield connection for
transducers
Module for MultiMediaCard (MMC) /
SD Card
LED 2
Connection 7:
RJ45 socket for Ethernet
connection (see Page 46)

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3.2 Overview of MP85ADP/MP85ADP-S functions
Screw terminal 1:
Voltage supply and CAN bus,
synchronization
Screw terminal 5:
Transducer connection channel x
including transducer excitation
Control keys
2-line LC display
Screw terminal 2: (same assignment as
screw terminal 1)
CAN adapter for PC/laptop connection,
parameterization via CAN bus
Screw terminal 6:
Transducer connection channel y
including transducer excitation
LED 1
Local connection of CAN bus, supply voltage and synchronization between modules
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
Cable shield connection for
transducers
Module for MultiMediaCard
(MMC) / SD Card
LED 2
Connection 4:
9-pin sub-D socket for
PROFIBUS DP
connection
Connection 7:
RJ45 socket for Ethernet
connection (see Page 46)

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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).
0 V
SYNC
Screw terminal 3
(control inputs/outputs,
switch test inputs)
LH
Screw terminal 1
(CAN bus voltage supply,
synchronization)
Connecting the power
supply:
The MP85A process controller must be connected to an
external supply voltage of 18−30 V (24 Vnom).
WARNING
DAttach wire end sleeves to the voltage supply wire ends.
DScrew the wire ends to screw terminal 1.
DInsert the screw terminal into the top socket.
DSwitch on the voltage supply.
IN = digital input OUT = digital output
CAUTION Should the mains power fail in the MP85A process controller,
all control outputs will be set to 0 V.
24 V
Labeling
Screw terminal 2
CAN
(CAN adapter; assignment as for
screw terminal 1)
Screw terminal 4 (MP85A(-S))
(control inputs/outputs, switch test inputs)
Out 1
Out 2
Out 3
Out 4
0 V
24 V
IN 1
Out 5
Out 6
Out 7
Out 8
IN 2
IN 3
IN 4
IN 5
IN
1
2
OUT
3
4
0V
24V
IN
1
5
6
OUT
7
8
2
3
IN
5
4
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)
OUT3
24 V*
0 V*
max. 0.5 A
MP85A process controller PLC Relay
0 V*
max. 0.5 A
OUT1
Screw terminal 3
24 V
Fig. 3.2: Connection to a PLC
The control outputs are available at screw terminals 3 and 4 and are elec-
trically 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
IN 3
IN
MP85A process controller
Screw terminal 3
Switch event / test specimen
24 V (10 ... 30 V)
0 V
Fig. 3.3: Connection of control input / switch test input
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
Dthe transducer cables of several devices run side by side
Dthe 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).

MP85A process controller
20
A2392−5.0 enHBM
3.4.2 SGs, displacement transducers, potentiometric and LVDT sensors
In “carrier-frequency amplifier” mode, the following transducer types can be
connected:
ye
SG and inductive full bridges,
piezoresistive transducers
1
2
4
6
Hsg.
5
3
wh
bk
rd
bu
gn
gy
ye
Cable color code:
wh= white; bk= black; bu= blue; rd= red; ye = yellow; gn= green; gy= gray
1
2
4
5
3
1
2
3
Potentiometric transducers*)
1
2
4
6
Sense lead (−)
Cable shield
1
2
4
5
3
wh
bk
bu
gn
gy
Sense lead (−)
Sense lead (+)
Cable shield
SG and inductive half bridges
LVDT transducer
Measurement signal (+) Measurement
signal (+)
Bridge excitation
voltage (−)Bridge excitation
voltage (−)
Bridge excitation
voltage (+)
Measurement signal (−)
Sense lead (+)
Hsg.
5
3
Hsg.
Hsg.
Bridge excitation
voltage (+)
Sense lead (−)
Cable shield
Measurement
signal (+)
Bridge excitation
voltage (−)
Bridge excitation
voltage (+)
Sense lead (+)
Sense lead (−)
Cable shield
Measurement
signal (+)
Bridge excitation
voltage (−)
Bridge excitation
voltage (+)
Sense lead (+)
Measurement
signal (−)
MP85A(-S)
Screw terminals 5 and 6
for transducer connection
MP85ADP(-S)
SENSOR X
18
SENSOR Y
18
*) 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.