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Manual

MOVITRAC® LTP-BFunctional Safety

Edition 05/2013 20123744 / EN

SEW-EURODRIVE—Driving the world

Manual – Functional Safety for MOVITRAC® LTP-B 3

Contents

1 General Information ............................................................................................... 41.1 How to Use This Documentation.................................................................... 41.2 Applicable standards...................................................................................... 41.3 Structure of the safety notes .......................................................................... 51.4 Rights to claim under limited warranty ........................................................... 61.5 Exclusion of liability ........................................................................................ 61.6 Copyright........................................................................................................ 61.7 Document content .......................................................................................... 61.8 Other applicable documents .......................................................................... 6

2 Integrated safety technology ................................................................................ 72.1 Safe status ..................................................................................................... 72.2 Safety concept ............................................................................................... 72.3 Safety functions ............................................................................................. 82.4 Limitations...................................................................................................... 9

3 Safety requirements............................................................................................. 103.1 Approved devices ........................................................................................ 113.2 Storage requirements .................................................................................. 133.3 Installation requirements .............................................................................. 133.4 Requirements for the external safety controller ........................................... 153.5 Startup requirements ................................................................................... 163.6 Operation requirements ............................................................................... 17

4 Connection variants............................................................................................. 184.1 General Information ..................................................................................... 184.2 Requirements............................................................................................... 194.3 Disconnection of single unit ......................................................................... 194.4 Group disconnection .................................................................................... 22

5 Technical data ...................................................................................................... 255.1 Safety features............................................................................................. 255.2 Safety contact signal terminal strip for STO................................................. 25

Index...................................................................................................................... 26

1 eneral Informationow to Use This Documentation

4

1 General Information1.1 How to Use This Documentation

This documentation is an integral part of the product and contains important informationon operation and service. The documentation is intended for all employees who performassembly, installation, startup and service work on the product.The documentation must be accessible and legible. Ensure that persons responsible forthe system and its operation, as well as persons who work independently on the unit,have read through the entire documentation and have understood it. If any of theinformation in this documentation is unclear or you require further information, pleasecontact SEW-EURODRIVE.Always use the current edition of the documentation and software. A large selection in various languages is available for download at the SEW-EURODRIVEhomepage (www.sew-eurodrive.com). If any of the information in this documentation isunclear or you require further information, please contact SEW-EURODRIVE directly. You can also order printed documentation from SEW-EURODRIVE.

1.2 Applicable standardsThe device’s safety is rated on the basis of the following standards and safety classes:

Applicable standards Safety category Independent testing by

EN 61800-5-2:2007 Type 2

German Technical Control Board

EN ISO 13849-1:2006 PL d

EN 61508:2010 Parts 1 – 7 SIL 2

EN 60204-1:2006 Stop category 0

EN 62061:2005 SIL CL 2

GH

Manual – Functional Safety for MOVITRAC® LTP-B

1General InformationStructure of the safety notes

1.3 Structure of the safety notes1.3.1 Meaning of signal words

The following table shows the graduation and meaning of the signal words for safetynotes, warnings regarding potential risks of damage to property, and other notes.

1.3.2 Structure of the section-related safety notesSection-related safety notes do not apply to a specific action, but to several actions per-taining to one subject. The symbols used indicate either a general or a specific danger.This is the formal structure of a section-related safety note:

1.3.3 Structure of the embedded safety notesEmbedded safety notes are directly integrated into the instructions just before thedescription of the dangerous action.This is the formal structure of an embedded safety note:• SIGNAL WORD Type and source of danger

Possible consequence(s) if disregarded– Measure(s) to prevent the danger

Signal word Meaning Consequences if disregardedDANGER Imminent danger Severe or fatal injuries

WARNING Possible dangerous situation Severe or fatal injuries

CAUTION Possible dangerous situation Minor injuries

NOTICE Possible damage to property Damage to the drive system or its environment

INFORMATION Useful information or tip: Simplifies handling of the drive system.

SIGNAL WORDType and source of dangerPossible consequence(s) if disregarded• Measure(s) to prevent the danger

5

1 eneral Informationights to claim under limited warranty

6

1.4 Rights to claim under limited warrantyAdhering to the MOVITRAC® LTP-B documentation is a requirement for fault-free oper-ation and the fulfillment of any rights to claim under limited warranty. For this reason,you must read the operating instructions before you start working with the unit.Make sure that the documentation is available to persons responsible for the system andits operation as well as to persons who work independently on the unit. You must alsoensure that the documentation is legible.

1.5 Exclusion of liabilityYou must comply with the information contained in these operating instructions toensure safe operation of the MOVITRAC® LTP-B and to achieve the specified productcharacteristics and performance features. SEW-EURODRIVE assumes no liability forinjury to persons or damage to equipment or property resulting from failure to observethe operating instructions. In such cases, any liability for defects is excluded.

1.6 Copyright© 2013 – SEW-EURODRIVE. All rights reserved.Any reproduction, modification, distribution or unintended use, in whole or in part, isprohibited.

1.7 Document contentThis document includes additional information for using MOVITRAC® LTP-B in safety-related applications. The system consists of a drive inverter with an AC motor and a safety-tested externaldisconnecting device.

1.8 Other applicable documentsThis document supplements the MOVITRAC® LTP-B operating instructions and limitsthe application notes according to the following information. It may only be used inconnection with the MOVITRAC® LTP-B operating instructions.

GR


2Integrated safety technologySafe status

2 Integrated safety technologyThe safety technology of the MOVITRAC® LTP-B described below has been developedand tested in accordance with the following safety requirements:

Certification by TÜV Rheinland (German Technical Control Board, Rhineland) was per-formed for this purpose. You can request copies of the German Technical Control Boardcertificate from SEW-EURODRIVE.

2.1 Safe statusSwitched-off torque is defined as the safe status for safety-oriented use of MOVITRAC®

LTP-B (see the STO – Safe Torque Off safety function). The basic safety conceptassumes this status.

2.2 Safety concept• In case of danger, any potential hazards for a machine must be eliminated as quickly

as possible. Dangerous movements can generally be prevented by bringing the unitto standstill and applying restart prevention.

• The STO – Safe Torque Off functionality is available regardless of the operatingmode or parameter settings.

• The MOVITRAC® LTP-B drive inverter features a connection option for an externalsafety relay. This activates the STO function when triggered by the connected com-mand unit (e.g. an emergency stop button with a catch function). The motor coastsdown and then has the "Safe Torque Off" status.

• When the STO is activated, the inverter is prevented from providing the motor with arotating field that would generate torque.

• In order to end STO mode, you must acknowledge the error messages and deacti-vate the STO inputs.

Applicable standards Safety category Independent testing by

EN 61800-5-2:2007 Type 2

German Technical Control Board

EN ISO 13849-1:2006 PL d

EN 61508:2010 Part 1 – 7 SIL 2

EN 60204-1:2006 Stop category 0

EN 62061:2005 SIL CL 2

7

2 ntegrated safety technologyafety functions

8

2.3 Safety functionsThe following drive-based safety functions can be used:• STO – (Safe Torque Off as defined in EN 61800-5-2) by switching off the STO input

If the STO function is activated, the frequency inverter no longer supplies power tothe motor for generating torque. This safety function corresponds to an uncontrolledstop according to EN 60204-1, stop category 0.The STO input must be switched off using a suitable external safety controller/safetyrelay.The following figure shows the STO function:

2463228171

v Velocityt Timet1 Time at which STO is triggered

Switch-off range

v

tt1

IS


2Integrated safety technologyLimitations

2.4 Limitations• Note that if the drive does not have a mechanical brake, or if the brake is defective,

the drive may coast to a halt (depending on the system’s friction and mass momentof inertia). With regenerative load ratios, the drive may even accelerate. This mustbe taken into account for a risk assessment of the system/machine. Additional safetymeasures (e.g. a safe braking system) may have to be implemented.MOVITRAC® LTP-B cannot be used without an additional braking system for appli-cation-specific safety functions that require active deceleration (braking) of the dan-gerous movement.

• When permanent-field motors are operated, multiple output stage errors for arotation of the rotor around 180°/p (p = number of pole pairs) can occur in extremelyrare cases.

WARNINGThe safety concept is only suitable for performing mechanical work on thesystem/machine components.Even when the STO signal is switched off, the line voltage is still applied to theMOVITRAC® LTP-B DC link.Severe or fatal injuries from electric shock• For work on the electrical section of the drive system, disconnect the supply voltage

using an appropriate disconnecting device and secure it against unintentionalreactivation.

• The STO function does not prevent an unexpected restart. As soon as the STOinputs receive an appropriate signal, an automatic restart can occur. The STO function may not be used for maintenance and repair work.

INFORMATIONIn case of a safety-related disconnection of the DC 24 V supply voltage at terminal 12(STO-activated), the brakes are always applied. The brake control in MOVITRAC®

LTP-B is not safety-oriented.

9

3 afety requirementsimitations

10

3 Safety requirementsTo ensure safe operation, the safety functions of MOVITRAC® LTP-B must be properlyintegrated into a higher-level, application-specific safety function. A system/machine-specific risk assessment must be carried out by the system/machine manufacturer andtaken into account for use of the drive system with MOVITRAC® LTP-B.The system/machine manufacturer and the operator are responsible for compliance ofthe system/machine with applicable safety regulations.The following aspects are mandatory when installing and operating MOVITRAC® LTP-Bin safety-related applications.

The requirements are divided into:• Approved devices• Installation requirements• Requirements for external safety controllers and safety relays• Startup requirements• Operation requirements

SL


3Safety requirementsApproved devices

3.1 Approved devicesThe following versions of MOVITRAC® LTP-B are authorized for safety-related applications:

3.1.1 MOVITRAC® LTP-B in IP20/NEMA 0; 1 × 220 – 240 V connection; with integrated EMC filter

3.1.2 MOVITRAC® LTP-B in IP20/NEMA 0; 3 × 220 – 240 V connections; with integrated EMC filter


3.1.4 MOVITRAC® LTP-B in IP55/NEMA 12; 1 × 220 – 240 V connection; with integrated EMC filter

PowerkW

Size Type

0.75 2 MCLTPB0008-2B1-4-001.5 2 MCLTPB0015-2B1-4-002.2 2 MCLTPB0022-2B1-4-00

PowerkW

Size Type

0.75 2 MCLTPB0008-2A3-4-001.5 2 MCLTPB0015-2A3-4-002.2 2 MCLTPB0022-2A3-4-003 3 MCLTPB0030-2A3-4-004 3 MCLTPB0040-2A3-4-005.5 3 MCLTPB0055-2A3-4-00

PowerkW

Size Type

0.75 2 MCLTPB0008-5A3-4-001.5 2 MCLTPB0015-5A3-4-002.2 2 MCLTPB0022-5A3-4-004 2 MCLTPB0040-5A3-4-005.5 3 MCLTPB0055-5A3-4-007.5 3 MCLTPB0075-5A3-4-0011 3 MCLTPB0110-5A3-4-00

PowerkW

Size Type

0.75 2 MCLTPB0008-2B1-4-101.5 2 MCLTPB0015-2B1-4-102.2 2 MCLTPB0022-2B1-4-10

11

3 afety requirementspproved devices

12



PowerkW

Size Type

0.75 2 MCLTPB0008-2A3-4-101.5 2 MCLTPB0015-2A3-4-102.2 2 MCLTPB0022-2A3-4-103 3 MCLTPB0030-2A3-4-104 3 MCLTPB0040-2A3-4-105.5 4 MCLTPB0055-2A3-4-107.5 4 MCLTPB0075-2A3-4-1011 4 MCLTPB0110-2A3-4-1015 5 MCLTPB0150-2A3-4-1018.5 5 MCLTPB0185-2A3-4-1022 6 MCLTPB0220-2A3-4-1030 6 MCLTPB0300-2A3-4-1037 6 MCLTPB0370-2A3-4-1045 6 MCLTPB0450-2A3-4-1055 7 MCLTPB0550-2A3-4-1075 7 MCLTPB0750-2A3-4-1090 7 MCLTPB0900-2A3-4-10

PowerkW

Size Type

0.75 2 MCLTPB0008-5A3-4-101.5 2 MCLTPB0015-5A3-4-102.2 2 MCLTPB0022-5A3-4-104 2 MCLTPB0040-5A3-4-105.5 3 MCLTPB0055-5A3-4-107.5 3 MCLTPB0075-5A3-4-1011 4 MCLTPB0110-5A3-4-1015 4 MCLTPB0150-5A3-4-1018.5 4 MCLTPB0185-5A3-4-1022 4 MCLTPB0220-5A3-4-1030 5 MCLTPB0300-5A3-4-1037 5 MCLTPB0370-5A3-4-1045 6 MCLTPB0450-5A3-4-1055 6 MCLTPB0550-5A3-4-1075 6 MCLTPB0750-5A3-4-1090 6 MCLTPB0900-5A3-4-10110 7 MCLTPB1100-5A3-4-10132 7 MCLTPB1320-5A3-4-10160 7 MCLTPB1600-5A3-4-10

SA


3Safety requirementsStorage requirements

3.2 Storage requirementsIn order to avoid inadvertent damage, SEW-EURODRIVE recommends leaving theinverter in its original packaging until it is used. The storage site must be dry and clean.The temperature range at the storage site must be between –40°C and +60°C.

3.3 Installation requirements• The safety-oriented DC 24 V supply voltage must be routed in an EMC-compliant

manner and as follows:– Outside an electrical installation space, shielded cables must be routed perma-

nently (fixed) and protected against external damage, or other equivalent mea-sures must be taken.

– Single conductors can be routed inside an electrical installation space.– Observe the applicable regulations for the application.

• Power lines and safety-related control cables have to be installed in separate cables.• It must be ensured that parasitic voltages cannot be generated in the safety-oriented

control cables.• Wire technology must comply with EN 60204-1. • Only use grounded voltage sources with safe disconnection (PELV) in accordance

with VDE0100 and EN 60204-1. The voltage between the outputs or between anyoutput and the grounded part may not exceed 60 V of DC voltage during a singlefault.

• Observe the notes in the MOVITRAC® LTP-B operating instructions for informationon EMC-compliant cabling. It is essential that you apply the shielding of the safety-related 24 V supply cable at both ends on the housing.

• The shield of the safety-related DC 24 V supply voltage (terminal 12) must beapplied.

• Either an external 24 V supply or the inverter’s 24 V supply can be used to supply the24 V STO input.

• When planning the installation, observe the technical data of MOVITRAC® LTP-B.• When designing the safety circuits, always observe the values specified for safety

components. • The cabling for the safety-related DC 24 V supply voltage may not be longer than

25 m.• The safety-related DC 24 V supply voltage may not be used for feedback.• Inverters with the IP20 degree of protection must be installed in an IP54 control cab-

inet (minimum requirement) in environments where the degree of pollution is 1 or 2.

13

3 afety requirementsnstallation requirements

14

• All connections (e.g. cables or data communication with bus systems) must be takeninto account in the performance level of one of the subsystems used, or faults in theconnections must be negligible or able to be ruled out.According to EN ISO 13849-2: 2008, the "Short circuit between any two conductors"error presumption can be ruled out under the following conditions: The conductors are:– Routed permanently (fixed) and protected against external damage (e.g. by a

cable duct, an armored conduit, etc.) – Laid in different non-metallic sheathed cables within an electrical installation

space, under the condition that both the cables and the installation space meetthe relevant requirements; see EN 60204-1

– Individually protected by a ground connectionThe "Short circuit between any conductor and an unprotected live part or the groundof a PE connection" error presumption can be ruled out under the followingconditions: – Short circuits between the conductor and every unprotected live part within an

installation space.

SI


3Safety requirementsRequirements for the external safety controller

3.4 Requirements for the external safety controller

A safety relay can be used as an alternative to a safety controller. The following require-ments apply mutatis mutandis.• The safety controller and all other safety subsystems must at least be approved for

the safety class required of the overall system for the application-specific safetyfunction. The following table shows examples of the safety class required for a given safetycontroller:

1593958923

[1] Safety relay with approval[2] DC 24 V voltage supply[3] Fuses in accordance with the specifications of the safety relay manufacturer[4] Safety-oriented DC 24 V voltage supply[5] Reset button for manual reset[6] Approved emergency stop operating element

Application Safety controller requirements

Performance level d according to EN ISO 13849-1 Performance level d according to EN ISO 13849-1SIL 2 according to EN 61508

[4]

[3][1]

[5]

[6]

[2] U

15

3 afety requirementstartup requirements

16

• The wiring of the safety controller must be suitable for the required safety class(see manufacturer documentation).– If the DC 24 V supply voltage is only safely disconnected at the positive pole, no

test pulses may be applied to this pole when it is disconnected.If the DC 24 V supply voltage is disconnected at two poles, test pulses may notbe applied simultaneously at the positive and negative outputs. The test pulsesmust take place at different times for each output.

– SEW-EURODRIVE recommends disconnecting the 24 V voltage supply at twopoles.

• The values specified for the safety controller must be strictly adhered to whendesigning the circuit.

• The switching capacity of the safety relays or the relay outputs of the safety controllermust be equivalent to at least the maximum permitted limited output current of the24 V supply voltage.Observe the manufacturer’s instructions regarding the permitted contact ratings andany required fusing for the safety contacts. If the manufacturer provides no specificinformation on this issue, the contacts must be protected with 0.6 times the nominalvalue of the maximum contact rating specified by the manufacturer.

• To ensure protection against an unexpected restart in accordance with EN 1037, thesafe control system must be designed and connected so that simply resetting thecommand unit does not cause a restart. The system may only restart after a manualreset of the safety circuit.

3.5 Startup requirements• After the safety function has been started up, it must be checked and documented to

prove that it was implemented successfully (validation).The limitations to the safety functions described in the "Limitations" (→ page 9)section must be taken into account. Non-safety-related parts and components thatwould affect the results of the validation (e.g. the motor brake) must be deactivatedas necessary.

• Startup checks of the disconnecting device and the wiring must always be performedand documented for use of MOVITRAC® LTP-B in safety-related applications.

INFORMATIONThe STO inputs may not be controlled using pulsed signals such as self-testing digitaloutputs of safety controllers.

SS


3Safety requirementsOperation requirements

3.6 Operation requirements• Operation is only allowed within the limits specified in the data sheets. This applies to

both the external safety controller and the options approved for MOVITRAC® LTP-B.• The safety functions must be checked at regular intervals, at least once a year, to

ensure that they are in perfect working order. The testing intervals should be definedbased on the risk assessment.

• The fans must be able to rotate freely, and the heat sinks must be kept free of dustand contamination.

• The installation space in which the inverter is mounted must be kept free of dust andcondensation. The fans and fan filters must be checked regularly to ensure that theyare in perfect working order.

• All the electrical connections and the tightening torque of the terminals must bechecked on a regular basis.

• Power cables must be checked for damage due to heat.

17

4 onnection variantseneral Information

18

4 Connection variants4.1 General Information

Generally, all the connection variants listed in this documentation are permitted forsafety-relevant applications as long as the basic safety concept is observed. This meansit is absolutely necessary that the DC 24 V safety inputs are switched using an externalsafety relay or a safety controller so that they cannot restart automatically.The basic selection, installation and use of the safety components such as the safetyrelay, emergency stop switch, etc. and the permitted connection variants must meet allthe safety requirements listed in sections 2, 3 and 4 of this document, which have pre-cedence over all other instructions.The wiring diagrams are block diagrams that show exclusively the safety function(s) andthe components necessary for these functions. In order to provide a better overview,they do not show components such as additional elements of the circuits that mustalways be implemented to provide touch guards, to regulate overvoltages and under-voltages, to detect ground faults and short circuits on external lines or to ensure the nec-essary interference immunity to electromagnetic exposure.

4.1.1 Connections on MOVITRAC® LTP-BThe following figure shows an overview of the signal terminals.

7952931339

+2

4 V

IO

DI 1

DI 2

DI 3

+10

V

AI 1 / D

I 4

0 V

AO

1 / D

O 1

0 V

AO

2 / D

O 2

ST

O+

ST

O–

AI 2 / D

I 5

1 2 3 4 5 6 7 8 9 10 11 12 13

CG


4Connection variantsRequirements

4.2 Requirements4.2.1 Using safety relays

The requirements of the manufacturers of safety relays (such as protecting the outputcontacts against welding) or other safety components must be strictly observed. Thebasic requirements described in this document apply to the cable routing.Please note the installation requirements described in the "Installation requirements"(→ page 13) section when connecting the MOVITRAC® LTP-B with the safety relays.Other instructions from the manufacturer on the use of safety relays for specific applica-tions must also be observed.

4.3 Disconnection of single unit4.3.1 STO according to PL d (EN ISO 13849-1)

The procedure is as follows:• The STO inputs (terminals 12 and 13) are disconnected at all poles.• If no brake is available, the motor coasts to a halt.

STO – Safe Torque Off (EN 61800-5-2)

7961677067*Safety input (terminal 12)

t

n

12*

INFORMATION• The STO disconnections shown can be used up to performance level d in accor-

dance with EN ISO 13849-1, taking the "Requirements" (→ page 19) section intoaccount.

19

4 onnection variantsisconnection of single unit

20

Binary control with a safety relay when an external 24 V supply is used

Binary control with a safety relay when an internal 24 V supply is used

8523484555

+24 V

Emergency stop

feedback

Reset

PLCIN OUT

Safety relay

Emergencystop StartStop

GND

Supply

system

2

12

13

1 = Enable

0 = Stop

STO+

STO -

LTP-B main

terminal

Higher-levelcontroller

8523494667

+24 V

Emergency stop

feedback

Reset

PLCIN OUT

Safety relay


Supply

system

1

2

12

13

24 V

1 = Enable

0 = Stop

STO+

STO -

9

LTP-B main

terminal


INFORMATIONFor single-channel disconnection, certain error presumptions must be made and han-dled through elimination of errors. Observe the "Requirements" (→ page 19) section.SEW-EURODRIVE recommends disconnecting the 24 V voltage supply of the STOinput at two poles.

CD


4Connection variantsDisconnection of single unit

4.3.2 SS1(c) according to PL d (EN ISO 13849-1)The procedure is as follows:• Terminal 2 is disconnected, e.g. for an emergency stop.• During the t1 safety time period, the motor travels along the ramp until it slows to a

standstill.• After t1 has elapsed, the safety inputs at terminals 12 and 13 are disconnected. The

t1 safe time must be planned so that the motor comes to a standstill during this timeperiod.

SS1(c) – Safe Stop 1 (EN 61800-5-2)

8526171019*Binary input 1 (terminal 2)**Safety input (terminal 12)

t

n

12**

2*

t 1

INFORMATION• The SS1(c) disconnections shown can be used up to performance level d in accor-

dance with EN ISO 13849-1, taking the "Requirements" (→ page 19) section intoaccount.

21

4 onnection variantsisconnection of single unit

22

Binary control with a safety relay when an external 24 V supply is used

Binary control with a safety relay when an internal 24 V supply is used

8523858443

+24 V

Emergency stop

feedback

Reset


PLCIN OUT

Safety relay


GND

Supply

system

2

12

13

1 = Enable

0 = Stop

STO+

STO -

t1

LTP-B main

terminal

8523868939

+24 V

Emergency stop

feedback

Reset

PLCIN OUT

Safety relay


Supply

system

1

2

12

13

24 V

1 = Enable

0 = Stop

STO+

STO -

9

t1

LTP-B main

terminal


INFORMATIONFor single-channel disconnection, certain error presumptions must be made and han-dled through elimination of errors. Observe the "Requirements" (→ page 19) section.SEW-EURODRIVE recommends disconnecting the 24 V voltage supply of the STOinput at two poles.

CD


4Connection variantsGroup disconnection

4.4 Group disconnectionThis section explains how multiple MOVITRAC® LTP-B units can be safely switched on.

4.4.1 RequirementsFor group drives, the 24 V safety inputs of several MOVITRAC® LTP-B units can bemade available using a single safety relay. The maximum number of axis modulesresults from the maximum permitted contact rating of the safety relay or the safetycontroller.Other requirements of the manufacturers of safety relays (such as protecting the outputcontacts against welding) or other safety components must be strictly observed. Thebasic requirements from the "Installation requirements" (→ page 13) section apply to thecable routing.Please note the installation requirements in the "Installation requirements" (→ page 13)section when connecting the MOVITRAC® with the safety relays.Other instructions from the manufacturer on the use of safety relays for specific applica-tions must also be observed.

Determining the maximum number of MOVITRAC® units for group disconnectionThe number (n units) of connected MOVITRAC® LTP-B units for group disconnection isa maximum of ten and limited by the following factors:

1. Switching capacity of the safety relay.A fuse must be connected in front of the safety contacts according to the specifica-tions of the safety relay manufacturer to prevent contact welding.The project planner is responsible for ensuring that the specifications for theswitching capacity as defined in EN 60947-4-1, 02/1 and EN 60947-5-1, 11/97, aswell as those for the contact fuse in the safety relay manufacturer’s operating instruc-tions, are strictly observed.

2. Maximum permitted voltage drop in the 24 V voltage supply line.For EMC reasons, the cable length is also limited to a maximum of 25 m.Values for cable length and permitted voltage drops must be observed during projectplanning for axis systems.

3. Maximum cable cross-section of 1 × 1.5 mm2 or 2 × 0.75 mm2.4. For the power consumption of the STO input and the input voltage, see the "Safety

contact signal terminal strip" (→ page 25) section.

23

4 onnection variantsroup disconnection

24

4.4.2 Implementation of group disconnection with the safety relayGroup disconnection with a safety relay

The safety inputs of all MOVITRAC® LTP-B units can be controlled using one safetyrelay.

Group disconnection with two safety relaysThe safety inputs of the assigned MOVITRAC® LTP-B units can be controlled using mul-tiple safety relays. In the following example, the MOVITRAC® LTP-B units in size 3 andthe MOVITRAC® LTP-B units in size 2 are compiled in two separate groups, each con-trolled by one safety relay.

8524401035

LTP-B

Safety relay®

Control cabinet

STO

STO STO

Size 2Size 2Size 3 Size 3

STO STO

Size 3

Safety relay 1

MOVITRAC

LTP-BLTP-BLTP-BLTP-B

8524465931

LTP-B

Safety relay®

Control cabinet

STO

STO STO

Size 2Size 2Size 3

LTP-B

Size 3

STO STO

Size 3

MOVITRAC

Safety relay 1

Safety relay 1 LTP-B LTP-BLTP-B

CG


5Technical dataSafety features

5 Technical data The following table shows the technical data of MOVITRAC® LTP-B in reference to theintegrated safety technology. The other technical data and approvals detailed in theMOVITRAC® LTP-B operating instructions must also be observed.

5.1 Safety features

5.2 Safety contact signal terminal strip for STO

Characteristic values as defined in

EN 61800-5-2 EN ISO 13849-1 EN 62061

Classification/applicable standards SIL 2 (Safety Integrity Level) PL d (performance level) SILCL 2

Probability of dangerous failure per hour (PFHd value)

1.23 × 10-9 1/h

Mission time 20 years, then the component must be replaced with a new component.

Proof test interval 20 years - 20 years

Safe status STO (Safe Torque Off)

Safety functions STO, SS11) in accordance with EN 61800-5-2

1) With suitable external controller

MOVITRAC® LTP-B Terminal Function General electronics data

Safety contact12 STO+ DC +24 V input, max. 100 mA, STO safety contact

13 STO– Reference potential for DC +24 V input, STO safety contact

Permitted cable cross-section One conductor per terminal: 0.05 – 2.5 mm2 (AWG 30 – 12)

Technical data for the STO input Min. Typical Max.

Input voltage range DC 18 V DC 24 V DC 30 V

Time to inhibit output stage - - 1 ms

Time until inhibit appears on the display when STO is activated - - 20 ms

Time until an STO switching time error is detected and displayed - - 20 ms

INFORMATIONThe STO inputs may not be controlled using pulsed signals such as self-testing digitaloutputs of safety controllers.


Pi

fkVA

Hz

n

25

26 Manual – Functional Safety for MOVITRAC® LTP-B

Index

IndexAApplicable documents, other .................................6Approved devices ...............................................11

CChecking the disconnecting device .....................16Connection variants ............................................18Copyright ...............................................................6

DDisconnection of a single unit

SS1 according to PL d (EN 13849-1) ...........21STO according to PL d (EN 13849-1) ..........19

Disconnection of single unit ................................19Requirements ...............................................19

Document content .................................................6

EEmbedded safety notes ........................................5Exclusion of liability ...............................................6External safety controller ....................................15

GGroup disconnection ...........................................22

Requirements ...............................................22With safety relay ...........................................24

HHow to Use This Documentation ..........................4

IInformation

Identification in the documentation .................5Information, General .............................................4Installation

Notes on routing the control cables ..............13Requirements ...............................................13

OOperation, requirements .....................................17

RRequirements

External safety controller ............................. 15Installation ................................................... 13Operation ..................................................... 17Startup ......................................................... 16

Right to claim under limited warranty ................... 6

SSafe status ........................................................... 7Safe Torque Off (STO) ......................................... 8Safety concept ..................................................... 7

Limitations ..................................................... 9Safety controller, external .................................. 15

Requirements .............................................. 15Safety notes

Identification in the documentation ................ 5Structure of embedded .................................. 5Structure of section-related ........................... 5

Safety notes, structure ......................................... 5Safety relay switching capacity .......................... 16Safety relays, requirements ............................... 19Safety requirements ........................................... 10Safety technology

Safe status ..................................................... 7Section-related safety notes ................................ 5Signal words in the safety notes .......................... 5SS1 according to PL d (EN 13849-1) ................. 21Standards ............................................................. 4Startup, requirements ........................................ 16STO (Safe Torque Off) ......................................... 8STO according to PL d (EN 13849-1) ................ 19STO input ........................................................... 25Structure of the safety notes ................................ 5

VValidating the safety functions ........................... 16Validation ........................................................... 16Validity ................................................................. 4

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