This document is a translation of the original document.
All rights to this documentation are reserved by Pilz GmbH & Co. KG. Copies may be made
for internal purposes.
Suggestions and comments for improving this documentation will be gratefully received.
Pilz®, PIT®, PMI®, PNOZ®, Primo®, PSEN®, PSS®, PVIS®, SafetyBUS p®, SafetyEYE®,
SafetyNET p®, the spirit of safety® are registered and protected trademarks of
Pilz GmbH & Co. KG in some countries.
SD means Secure Digital.
Preface
Contents
Contents
ContentsPage
Chapter 1 Introduction
1.1Validity of documentation1-1
1.1.1Retaining the documentation1-1
1.2Overview of documentation1-2
1.3Definition of symbols1-3
Chapter 2 Overview
2.1Unit structure2-1
2.1.1Range2-1
2.1.2Unit features2-1
2.2Front view2-2
Chapter 3 Safety
3.1Intended use3-1
3.1.1System requirements3-2
3.2Safety regulations3-3
3.2.1Use of qualified personnel3-3
3.2.2Warranty and liability3-3
3.2.3Disposal3-3
3.2.4For your safety3-4
Chapter 4 Function description
4.1Device properties4-1
4.1.1Integrated protection mechanisms4-1
4.1.2Function description4-1
4.1.2.1Operation4-1
4.1.2.2Block diagram4-1
4.2Input device types4-2
4.2.1Proximity switch4-2
4.2.1.1Requirements of the proximity switches4-2
4.2.2Incremental encoders4-3
4.2.2.1Requirements of the incremental encoders 4-3
4.2.2.2Adapter for incremental encoders4-3
4.2.3Incremental encoder and proximity switch
on one axis
11000IntroductionIntroduction1-1.1Validity of docume ntation1100Validity of documenta tion1-Einf Gltigkeit der Dokumentation
This documentation is valid for the product PNOZ ms2p HTL. It is valid
Einf Einleitung_alt
until new documentation is published.
This operating manual explains the function and operation, describes
the installation and provides guidelines on how to connect the product
PNOZ ms2p HTL.
Verwendung/Bildunterschrift_multi_Drehzahlwchter
Speed monitor for connection to a base unit from the PNOZmulti modular safety system
Application of the product PNOZ ms2p HTL:
1.1.1Retaining the documentation
Retaining the documentation1-Einf Aufbewahren
This documentation is intended for instruction and should be retained
for future reference.
1.3Definition of symbols1300Definition of symbols1-Einfhrung Zeichen
Information that is particularly important is identified as follows:
DANGER!
This warning must be heeded! It warns of a hazardous situation
that poses an immediate threat of serious injury and death and
indicates preventive measures that can be taken.
WARNING!
This warning must be heeded! It warns of a hazardous situation
that could lead to serious injury and death and indicates preventive measures that can be taken.
CAUTION!
This refers to a hazard that can lead to a less serious or minor
injury plus material damage, and also provides information on
preventive measures that can be taken.
NOTICE
This describes a situation in which the unit(s) could be damaged
and also provides information on preventive measures that can
be taken. It also highlights areas within the text that are of particular importance.
INFORMATION
This gives advice on applications and provides information on
special features.
The expansion module monitors standstill, speed and direction of rotation in accordance with EN ISO 13849-1 up to PL e and EN IEC 62061
up to SIL CL 3.
The expansion module may only be connected to a base unit from the
PNOZmulti modular safety system.
The modular safety system PNOZmulti is used for the safety-related interruption of safety circuits and is designed for use on:
E-STOP equipment
Safety circuits in accordance with VDE 0113 Part 1 and EN 60204-1
WARNING!
Users must take appropriate measures to detect or exclude
errors (e.g. slippage or broken shearpin) which cause the frequency of the encoder signal to no longer be proportional to the
monitored speed.
Appropriate measures are:
Using the monitored encoder to also control the drive
Mechanical solutions
Monitoring for broken shearpin by means of the speed monitor
WARNING!
A single-channel open circuit/input device error is recognised
and leads to a safe condition of the outputs at the relevant axis.
For applications in accordance with PL e and SIL CL 3, the
"Overspeed" output must be integrated into the safety function
in every operating mode and evaluated so that a shutdown
occurs if the output switches to a safe condition ("Overspeed"
output = "0").
If there are frequency differences between tracks A and B of the
incremental encoder and/or between the proximity switches on
inputs I10 (I20) and I11 (I21), the PNOZmulti switches to a safe
condition if a frequency exceeds the configured standstill frequency. If the speed monitor detects different rotation directions, note the following:
With version 1.X devices the PNOZmulti changes to STOP.
With devices from version 2.0, the axis in question switches to
a safe condition. The safe condition is cleared again as soon
as the error is remedied. Hazards that can arise through an automatic restart must be excluded within the user program.
3.1.1System requirements
System requirements3-Systemvoraussetzungen - Verweis auf Produktänderungen
Please refer to the "Product Modifications" document in the "Version
overview" section for details of which versions of the base unit and
PNOZmulti Configurator can be used for this product.
The products may only be assembled, installed, programmed, commissioned, operated, maintained and decommissioned by competent persons.
A competent person is someone who, because of their training, experience and current professional activity, has the specialist knowledge required to test, assess and operate the work equipment, devices,
systems, plant and machinery in accordance with the general standards
and guidelines for safety technology.
It is the company's responsibility only to employ personnel who:
Are familiar with the basic regulations concerning health and safety /
accident prevention
Have read and understood the safety guidelines given in this descrip-
tion
Have a good knowledge of the generic and specialist standards ap-
plicable to the specific application.
3.2.2Warranty and liability
Warranty and liability3-Sich Gewhrleistung
3.2.3Disposal
Disposal3-Si ch Entsorgung
All claims to warranty and liability will be rendered invalid if:
The product was used contrary to the purpose for which it is intended
Damage can be attributed to not having followed the guidelines in the
manual
Operating personnel are not suitably qualified
Any type of modification has been made (e.g. exchanging compo-
nents on the PCB boards, soldering work etc.).
In safety-related applications, please comply with the mission time t
M
in the safety-related characteristic data.
When decommissioning, please comply with local regulations regard-
ing the disposal of electronic devices (e.g. Electrical and Electronic
Equipment Act).
The unit meets all necessary conditions for safe operation. However,
you should always ensure that the following safety requirements are
met:
This operating manual only describes the basic functions of the unit.
Information on the advanced functions can be found in the online help
for the PNOZmulti Configurator and in the PNOZmulti technical catalogue. Only use these functions after you have read and understood
the documentation. All necessary documentation can be found on the
PNOZmulti Configurator CD.
Do not open the housing or make any unauthorised modifications.
Please make sure you shut down the supply voltage when performing
The speed monitor can independently monitor two axes for standstill,
speed and direction of rotation. The speed monitor signals the status of
the monitored values to the base unit. Depending on the safety circuit
loaded, the values can be transferred from the base unit, e.g. to a relay
output on the safety system. Incremental encoders and/or proximity detectors can be used to record the values.
4.1.2.2Block diagram
Block diagram4-Blockschaltbild
The configuration of the speed monitor is described in detail in the
PNOZmulti Configurator's online help.
Requirements of the proximity swi tches4-Drehzahlwaechter_Naeherungsschalter_Anford
Only "pnp" type proximity switches may be used (N/O contact,
switching to positive).
The proximity switches require a 24 VDC supply.
The proximity switches must be fitted so that at least one is always
activated (carries a high signal).
The proximity switches must be fitted so that the recorded signals
overlap.
Fig. 4-1:Example proximity switch signal behaviour
CAUTION!
Appropriate installation measures should be taken to prevent a
foreign body coming between the signal input device and the
proximity switch. The foreign body could cause one of the proximity switches to be constantly energised (constant high signal).
Please note the values stated in the technical details
Requirements of the incremental encoders4-Drehzahlwaechter_Inkrementalgebertypen_HTL
Only incremental encoders with a differential output of the following
type are permitted
– HTL (12 V – 30 V)
Please note the values stated in the technical details
4.2.2.2Adapter for incremental encoders
Adapter for incremental encoders4-Drehzahlwaechter_Inkrementalgeber_Adapter
The adapter records the data between the incremental encoder and the
drive and makes it available to the speed monitor via the RJ45 socket.
Pilz supplies complete adapters as well as ready-made cable with RJ45
connector, which can be used when making your own adapter. The
range of products in this area is constantly being expanded. Please contact us about the range of adapters that is currently available.
4.2.3Incremental encoder and proximity switch on one axis
Incremental encoder and proximity switch on one axis4-Drehzahlwaechterr_Naeherungssch_Inkrement_auf_einer_Achse
In order to increase the availability, a proximity switch and an incremental encoder can be configured on one axis for the speed monitor. That
way the speed monitor can monitor 3 signals on one axis: Track A and
track B of the incremental encoder and the proximity switch:
Standstill monitoring
Standstill is detected when at least two of these signals fall below the
standstill frequency.
If the Broken shearpin monitoring option is activated, a shearpin break
is recognised if
both signals of the incremental encoder fall below the set standstill
frequency (standstill)
and
the proximity switch exceeds the set standstill frequency (rotating
shaft).
The recognised broken shearpin leads to safe condition (see status B2
in "Signal statuses" table in Chapter 8 of the operating manual). If individual or multiple signals change, the safe condition is cleared again as
required (see "Signal statuses" table).
Hazards that can arise through an automatic restart must be excluded
within the user program.
The safety system should be installed in a control cabinet with a pro-
tection type of at least IP54. Fit the safety system to a horizontal
mounting rail. The venting slots must face upward and downward.
Other mounting positions could destroy the safety system.
Use the notches on the rear of the unit to attach it to a mounting rail.
Connect the safety system to the mounting rail in an upright position,
so that the earthing springs on the safety system are pressed on to
the mounting rail.
The ambient temperature of the PNOZmulti units in the control cabi-
net must not exceed the figure stated in the technical details, otherwise air conditioning will be required.
To comply with EMC requirements, the mounting rail must have a low
impedance connection to the control cabinet housing.
Montage_EMV ESD
CAUTION!
Damage due to electrostatic discharge!
Electrostatic discharge can damage components. Ensure
against discharge before touching the product, e.g. by touching
an earthed, conductive surface or by wearing an earthed armband.
66000CommissioningCommissioning6-6.1Gene ral wiring guideline s6100General wi ring guidelines6-Verdrahtung_multi_Drehzahlwaechter
The wiring is defined in the circuit diagram of the PNOZmulti Configurator.
Details of the input type, axis type and reset mode, plus the values for
standstill, speed monitoring and direction of rotation are also defined in
the PNOZmulti Configurator.
Please note:
Information given in the "Technical details" must be followed.
Verdrahtung_multi_Drehzahlwaechter_Zusatz_BA
Use copper wire that can withstand 75 °C.
CAUTION!
The configurable switch-off delay when reaching the overspeed
increases the reaction time of the system of base unit and speed
monitor by the entered value (see technical details). This must
not impermissibly delay the occurrence of a safe condition. The
configuration of the switch-off delay must be considered in the
risk assessment as regards hazards, reaction time and safety
distance.
On each of the 2 axes you can connect as required:
6.2Preparing for operation6200Preparing for operation6-
6.2.1Connection of proximity switches
Connection of proximity switches6-Drehzahlwaechter_Betriebsb_Naeherungssch_BA
Proceed as follows when connecting proximity switches:
Terminals I10 and I11: connect the proximity switch for axis 1
Terminals I20 and I21: connect the proximity switch for axis 2.
If only one axis is to be monitored, either terminals I10 and I11 or ter-
minals I20 and I21 will remain free.
When connecting incremental encoders and proximity switches on an
axis:
– Terminals I10: connect proximity switch for axis 1 (I11 is not used)
– Terminals I20: connect proximity switch for axis 2 (I21 is not used)
The proximity switch must always be connected to a 0 V terminal of
the speed monitor. The 0 V terminals are connected internally.
Connect proximity switch to 24 VDC of the power supply or the speed
monitor (the 24 V terminals of the speed monitor are connected internally)
Connection of the incremental encoder6-Drehzahlwaechter_Betriebsb_Inkremen
Follow the instructions below when connecting the incremental encoder:
The incremental encoder can be connected via an adapter (e.g.
PNOZ msi4p) or can be connected directly to the speed monitor.
The incremental encoder on connector X12 monitors axis 1; the incre-
mental encoder on connector X22 monitors axis 2.
Only use shielded cables for all connections
Always connect 0 V on the incremental encoder and speed monitor.
Position the terminating resistors on the signal lines as close as pos-
sible to the input on the speed monitor.
6.2.2.1Connect signals of the incremental encoder to the speed monitor
Connect signals of the incremental encoder to the speed monitor6-Drehzahlwaechter_Betriebsb_Inkremen_24V-HTL_BA
Encoder types: 24 V-HTL
Apply 24 VDC supply voltage to incremental encoder only
Do not terminate incremental encoder with Z0 = 120 Ohm
Fig. 6-3:Connection to incremental encoder type 24 V-HTL
6.2.3.2Proximity switch and incremental encoder on one axis
Proximity switch and incremental encoder on one axis6-Drehzahlwaechter_Betrie bs_Naeherungssch_ u_Inkremen_1Achse _BA
Axis 1:
Proximity switch at I10 (I11 is unused)
and
Incremental encoder at X12
Axis 2:
Proximity switch at I20 (I21 is unused)
and
Incremental encoder at X22
Fig. 6-7:Proximity switch and incremental encoder on one axis
When the supply voltage is switched on, the PNOZmulti safety system
copies the configuration from the chip card.
The LEDs "POWER","DIAG", "FAULT", "IFAULT" and "OFAULT" light up
on the base unit.
The PNOZmulti safety system is ready for operation when the "POWER"
and "RUN" LEDs on the base unit and the "READY" LED on the
PNOZ ms2p HTL are lit continuously.
Key
AStandstill, no fault000110000
B1 *)Standstill, fault on proximity switch001110100
B2 *)Broken shearpin001000101
CStandstill, unwanted signal change, track A010110000
DRotating shaft, fault, track A01100/1 **)0011
EStandstill, unwanted signal change, track B100110000
FRotating shaft, fault, track B10100/1 **)0011
GRotating shaft, fault at proximity switch11000/1 **)1001
HRotating shaft, no fault11100/1 **)0000
Incremental encoder track A
Incremental encoder track B
OutputsDiagnostic word
****)
Proximity switch
Standstill
Overspeed, no fault on the speed monitor
Bit 9: Proximity switch fault
Bit 9: Incremental encoder fault
Bit 10: Frequency difference, track A and B
Entry in the error stack
*) Status B only leads to a safe shutdown when the "broken shearpin
monitoring" option is activated (B2). If the option is not activated (B1),
only bit 9 of the diagnostic word will be set.
**) The speed output is "1" if the configured overspeed is not exceeded.
***) Input = 1: Speed monitor detects impulses
Input = 0: Speed monitor detects no impulses
****) For explanations of the speed monitor's diagnostic word, see the
PNOZmulti Configurator's online help
Monitoring the direction of rotation: If an internal error occurs or there is
an error due to a defective incremental encoder ("FAULT" LED illuminates or flashes), an incorrect direction of rotation can be signalled for
approx. 500 ms.
Supply voltage UB DC
via base unit5 V, 24 V
Voltage tolerance-15 %/+20 %
Power consumption at U
via base unit1.0 W
Residual ripple DC5 %
Status displayLED
Times
Configurable switch-off delay0 - 2,500 ms
Reaction time
f>100 Hz: configurable switch-off delay + switch-off delay
on base unit *
f<100 Hz: configurable switch-off delay + switch-off delay
on base unit *
Supply interruption before de-energisation 20 ms
Proximity switch input
Number of inputs4
Input signal level
Signal level at "1"11 - 30 V
Signal level at "0"-3 - 5 V
Input resistance3 kOhm
Input's frequency range0 - 3 kHz
Configurable monitoring frequency
without hysteresis0,1 Hz - 3 kHz
with hysteresis0,2 Hz - 3 kHz
Connection typespring-loaded terminal, screw terminal
Cross section of external conductors with screw terminals
1 core flexible0.50 - 1.50 mm² , 22 - 14 AWG
2 core, same cross section, flexible:
with crimp connectors, without insulating sleeve0.50 - 0.75 mm² , 22 - 20 AWG
without crimp connectors or with TWIN crimp connectors0.50 - 0.75 mm² , 22 - 20 AWG
Incremental encoder input
Number of inputs2
Input signal level12.0 - 30.0 Vss
Phase position for the differential signals A,/A and B,/B90° ±30°
Overload protection-30 - 30 V
Input resistance10.0 kOhm
Input's frequency range0 - 200 kHz
Configurable monitoring frequency
without hysteresis0,1 Hz - 200 kHz
with hysteresis0,2 Hz - 200 kHz
Connection type (incremental encoder)RJ45 socket, 8-pin
Environmental data
EMCEN 60947-5-1
Vibration to EN 60068-2-6
Frequency10 - 55 Hz
Amplitude0.35 mm
Climatic suitabilityEN 60068-2-78
Airgap creepage in accordance with EN 60664-1
Ambient temperature0 - 60 °C
Storage temperature-25 - 70 °C
Mechanical data
Protection type
Mounting (e.g. cabinet)IP54
HousingIP20
TerminalsIP20
DIN rail
Top hat rail35 x 7.5 EN 50022
Recess width27 mm
Housing material
HousingPPO UL 94 V0
FrontABS UL 94 V0
Torque setting with screw terminals0.25 Nm
Dimensions
Height94.0 mm
Width45.0 mm
Depth121.0 mm
Weight220 g
Si-Kennzahlen_alle
Safety characteristic data
UnitOperating modeEN ISO 13849-
1: 2006
EN 954-1
Category
EN IEC 62061
SIL CL
PFH [1/h]EN ISO
PL
initiatorPL e (Cat. 3)Cat. 3SIL CL 33.68E-0920
incremental encod-erPL e (Cat. 3)Cat. 3SIL CL 36.73E-0920
Si_Kennzahlen_Erläuterung_1
All the units used within a safety function must be considered when cal-
Standstill: depending on requirement
Speed n1: greater than the maximum permitted speed.
If the "Overspeed" output (see red marking) = "0", either the maximum
permitted speed has been exceeded or the speed monitor has recognised a fault.
"Overdrive" output = "0" must lead to the shutdown of the relevant axis.
Safe monitoring with "reduced speed" operating mode
9-2
Configuration in the PNOZmulti Configurator
Standstill: depending on requirement
Speed n1: reduced speed, depending on requirement
speed n2: greater than the maximum permitted speed.
If the "Overspeed" output (see red marking) = "0", either the maximum
permitted speed has been exceeded or the speed monitor has recognised a fault.
"Overspeed" output = "0" must lead to the shutdown of the relevant axis, irrespective of whether the "reduced speed" operating mode is active.
In many countries we are
represented by our subsidiaries
and sales partners.
Please refer to our homepage
for further details or contact our
headquarters.
InduraNET p
®
, Pilz
®
, PIT
®
, PMCprotego
®
, PMI
®
, PNOZ
®
, Primo
®
, PSEN
®
, PSS
®
, PVIS
®
, SafetyBUS p
®
, SafetyEYE
®
, SafetyNET p
®
, the spirit of safety
®
are registered and protected trademarks
of Pilz GmbH & Co. KG in some countries. We would point out that product features may vary from the details stated in this document, depending on the status at the time of publication and the scope
of the equipment. We accept no responsibility for the validity, accuracy and entirety of the text and graphics presented in this information. Please contact our Technical Support if you have any questions.
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