Danfoss MCB 152 User manual

Installation Guide
VLT®Safety Option MCB 152
VLT® AutomationDrive FC 302 and VLT® Decen-
tral Drive FCD 302

Contents
1 Introduction 6
1.1 Purpose of this Installation Guide 6
1.2 Trademarks 6
1.3 Additional Resources 6
1.4 Document Version 6
1.5 Product Overview 6
1.5.1 Intended Use 6
1.5.2 Unit Features 7
1.5.3 Items Supplied 8
1.5.4 Compatible Drive Series 8
1.5.5 Front View 8
1.5.6 Hardware and Software Requirements 8
1.6 Compliance and Certifications 9
1.7 Disposal 9
2 Safety 10
2.1 Safety Symbols 10
2.2 Qualified Personnel 10
2.3 Responsibilities of Users of PDS(SR) 10
2.4 Protective Measures 11
2.5 Safety Precautions 11
2.6 Risk Assessment 13
2.6.1 Validation of Performance Level 13
3 Functions 14
3.1 Safety Functions 14
3.2 Safe Torque Off - STO 14
3.3 Specification of Safety functions 16
3.4 Activation of Safety functions 16
3.5 Activation of STO from Multiple Sources 16
3.6 Functional Proof Tests 16
3.7 PFD and PFH Definitions 16
3.8 Internal Faults 16
3.9 Inputs and Outputs 17
3.9.1 Allowed Sensor Types on Digital Inputs 17
3.9.2 Inputs 17
3.9.3 Safe Option Monitoring (SO Mon) 17
3.9.4 Output 17
3.9.5 Signal Filtering 17
3.9.6 Stable Signal Time from Safe Outputs 18
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4 Installation 20
4.1 Safety Instructions 20
4.2 Installation Overview 20
4.3 Installing the Option 21
4.4 Electrical Installation 22
4.4.1 Cabling Requirements 22
4.4.2 Connector Pin Assignment 23
4.4.3 Wiring Procedures 24
4.4.4 Installation Checklist 26
5 Commissioning 27
5.1 Before Commissioning 27
5.2 Commissioning Procedure 27
5.3 Power-up/Self-test 28
5.4 Commissioning in Online Mode 28
5.5 Commissioning Test 32
5.5.1 Performing the Commissioning Test 32
5.6 Operation 33
5.7 Commissioning Setup Examples 34
6 Configuring the Safety Option 35
6.1 PROFIsafe Configuration 35
6.1.1 Telegram Configuration 35
6.1.2 Safety Functions Configuration 36
6.1.3 Password Protection 36
6.2 Status over Fieldbus 37
6.2.1 Safety Option Reset via Control Word 37
6.2.2 Safety Option Status 38
6.3 Reset Function 41
6.3.1 Reset Input (DI2) 41
6.4 Configuring PROFIsafe with Siemens Step 7 42
6.4.1 Configuring the Hardware 42
6.4.1.1 Watchdog Time 45
6.5 Configuring PROFIsafe with Siemens TIA Portal 45
6.5.1 Configuring the Hardware 45
6.5.2 Programming Safety Functions with Siemens Step 7 and TIA Portal 47
7 Parameter Setup 48
7.1 About Safety Parameters 48
7.2 Parameter Lists 48
7.2.1 Parameter Group 42-2* Safe Input 48
7.2.2 Parameter Group 42-3* General 49
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7.2.3 Parameter Group 42-6* Safe Fieldbus 50
7.2.4 Parameter Group 42-8* Status 51
7.2.5 Parameter Group 42-9* Special 52
7.2.6 Parameter Group 600-** PROFIsafe 52
7.2.7 Parameter Group 0-6* Password 53
8 Application Examples 54
8.1 Connecting Safe Digital Inputs 54
9 Maintenance, Diagnostics, and Troubleshooting 57
9.1 Maintenance and Service 57
9.1.1 Yearly Test 57
9.2 Repair and Troubleshooting 58
9.2.1 Removing the Safety Option (FC 302 only) 58
9.2.2 Replacing the Safety Option (FC 302 only) 59
9.2.3 Mismatch of Safety Option Parameters (FC 302 only) 60
9.2.3.1 Transferring Parameter 60
9.2.4 Copying Safe Parameter Configuration 60
9.3 Error Conditions 61
9.3.1 Error Descriptions 61
9.4 LCP Messages 68
9.4.1 LCP Status Messages 69
10 Specifications 72
10.1 Consumption 72
10.2 Inputs 72
10.2.1 Digital Inputs 72
10.3 Output 72
10.3.1 Digital Output (Safe Output) 72
10.3.2 24 V Supply Output 72
10.4 Other Specifications 73
10.4.1 Connector Cable Dimensions 73
10.4.2 Reset Characteristics 73
10.4.3 Response Time 73
10.4.4 Safety Characteristic Data 73
11 Appendix 76
11.1 Abbreviations 76
11.2 Conventions 77
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1 Introduction
1.1 Purpose of this Installation Guide
This manual provides information for safe installation and commissioning of a VLT® Safety Option MCB 152 for PROFIsafe
communication
The Installation Guide is intended for use by qualified personnel only. Personnel must be familiar with the VLT® drive series.
Read and follow this Installation Guide before installation, and ensure that instructions for safe installation are observed. Always keep
these instructions available with the drive.
1.2 Trademarks
VLT® is a registered trademark for Danfoss A/S.
1.3 Additional Resources
More information resources are available to understand advanced drive functions and programming.
• The VLT® AutomationDrive FC 301/FC 302 and the VLT® Decentral Drive FCD 302 Operating Guides provide information required to
install and commission the drive for given applications.
• The VLT® PROFINET MCA 120 Installation Guide provides instructions on how to install the PROFINET option.
• VLT® Motion Control Tool MCT 10 Operating Guide describes how to configure the safety option via the MCT 10 Set-up Software.
• VLT® Frequency Converters Safe Torque Off Operating Guide describes the use of VLT® FC Series drives in functional safety
applications.
Technical documentation for other product options is available at www.danfoss.com.
1.4 Document Version
This Installation Guide is regularly reviewed and updated. All suggestions for improvement are welcome.
The original language of this manual is English.
Table 1: Document Version
Revision Remarks
AN327351953089, version 0101 Now also available for VLT® Decentral Drive FCD 302.
Changed from Operating Guide to Installation Guide.
1.5 Product Overview
1.5.1 Intended Use
VLT® Safety Option MCB 152 is designed to activate and deactivate safety functions of a drive through the PROFIsafe fieldbus. Using
the fieldbus, requires the VLT® PROFINET MCA 120 option to be installed. The safety functions of the safety option are implemented
according to EN IEC 61800-5-2.
Introduction
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The safety option:
• Activates safety functions on request.
• Sends status information to the safety control system via a connected PROFINET fieldbus.
• Activates the safe state when the option detects faults.
The safety control system:
• Activates safety functions via input on the safety option and/or via the safe fieldbus.
• Evaluates signals from safety devices, such as:
- E-STOP push buttons
- Non-contact magnetic switch
- Interlocking switch
- Light curtain devices
The safety devices are connected to digital inputs of the safety option or digital input of the PLC.
• Provides safe connection between the safety option and a safety control system.
• Provides fault detection on the signal between a safety control system and the safety option at activation of safety functions (short
across contacts, short circuit).
MCA 120
PROFINET
MCB 152
Safety Option
μ C
IGBT
STO
37
M
Safe PLC
E
M
E
R
E
N
C
Y
G
S
T
O
P
Control card
Internal bus 1
Option A
Option B
Internal bus 2
e30bd977.11
Illustration 1: FC 302 with VLT® Safety Option MCB 152 and Fieldbus Option
1.5.2 Unit Features
The safety option has the following features:
Introduction
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• Safety functions: Safe Torque Off (STO) in accordance with EN IEC 61800-5-2
• PROFIsafe version 2.4 communication
• Two dual-channel digital inputs:
- Safety function activation
- Monitoring
- Configurable reset behavior (automatic or manual reset).
• LED status indication
• Supply voltage
- Internally supplied by the drive
- 24 V DC output for safety sensors available.
• Safe output S37
1.5.3 Items Supplied
• VLT® Safety Option MCB 152
• VLT® Safety Option MCB 152 Installation Guide
1.5.4 Compatible Drive Series
The VLT® Safety Option MCB 152 is a standard B option compatible with:
• VLT® AutomationDrive FC 302
• VLT® Decentral Drive FCD 302
1.5.5 Front View
MCB 152
Safe Option
PROFIsafe
SW. ver. xx.xx
Option B
130B9860
LED:
1
1 2 3 4 5 6 7 8 9 10 11 12
2 3 4
Y33/
DI1 A GND GND GND GND DI1 B NC NC 24 V S 37 DI2 A DI2 B
e30be100.11
Illustration 2: VLT® Safety Option MCB 152 Front View
1.5.6 Hardware and Software Requirements
The following software versions are required as a minimum when using VLT® Safety Option MCB 152:
• LCP software version 7.0
• VLT® AutomationDrive FC 302 firmware version 7.26
• VLT® Decentral Drive FCD 302 firmware version 8.23
• PROFINET software version 3.0
• VLT® Motion Control Tool MCT 10 software version 3.23. A license key is required to use the full set of features.
Introduction
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1.6 Compliance and Certifications
The VLT® Safety Option MCB 152 is certified for use in safety applications up to and including:
• SIL 2 according to EN IEC 61508 and EN IEC 62061
• Performance Level PL d.
• Category 3 according to EN ISO 13849-1
Safety requirements are based on the standards valid at the time of certification. The VLT® Safety Option MCB 152 is approved for use
in safety-related applications where the de-energized state is considered to be the safe state. All examples related to I/O included in
this manual are based on achieving de-energization as the safe state.
Approvals
The MCB 152 is tested and certified by PNO.
1.7 Disposal
Do not dispose of equipment containing electrical components together with domestic waste.
Collect it separately in accordance with local and currently valid legislation.
Introduction
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2 Safety
2.1 Safety Symbols
The following symbols are used in this manual:
DANGER
Indicates a hazardous situation which, if not avoided, will result in death or serious injury.
WARNING
Indicates a hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION
Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
NOTICE
Indicates information considered important, but not hazard-related (for example, messages relating to property damage).
2.2 Qualified Personnel
The products must only be assembled, installed, programmed, commissioned, maintained, and decommissioned by persons with
proven skills. Persons with proven skills:
• Are qualified electrical engineers, or persons who have received training from qualified electrical engineers and are suitably
experienced to operate devices, systems, plant, and machinery in accordance with the general standards and guidelines for safety
technology.
• Are familiar with the basic regulations concerning health and safety/accident prevention.
• Have read and understood the safety guidelines given in this manual and also the instructions given in the operating guide of the
drive.
• Have good knowledge of the generic and specialist standards applicable to the specific application.
2.3 Responsibilities of Users of PDS(SR)
Context:
In EN ISO 12100, risk assessment is defined as an overall process comprising a risk analysis and a risk evaluation.
Procedure
1. Carry out a hazard and risk analysis of the application according to EN ISO 12100.
2. Identify safety functions required and allocate SIL or PLr to each of the functions.
3. Identify other subsystems and validate the signals and commands from those subsystems.
4. Design appropriate safety-related control systems (hardware, software, parameterization, and more).
Safety
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2.4 Protective Measures
• Safety engineering systems may only be installed and commissioned by qualified and skilled personnel.
• Install the drive in an IP54 cabinet as per IEC 60529 or in equivalent environment. In special applications, a higher IP degree may be
necessary.
• Ensure short-circuit protection of the cable between the safety option and the external safety device according to ISO 13849-2
table D.5. When external forces influence the motor axis (for example, suspended loads) extra measures (for example, a holding
safety brake) are required to eliminate hazards.
2.5 Safety Precautions
WARNING
HIGH VOLTAGE
AC drives contain high voltage when connected to AC mains input, DC supply, or load sharing. Failure to perform installation,
start-up, and maintenance by qualified personnel can result in death or serious injury.
-Only qualified personnel must perform installation, start-up, and maintenance.
WARNING
UNINTENDED START
When the drive is connected to the AC mains, DC supply, or load sharing, the motor may start at any time, causing risk of death,
serious injury, and equipment or property damage. The motor may start by activation of an external switch, a fieldbus
command, an input reference signal from the LCP or LOP, via remote operation using MCT 10 Set-up software, or after a cleared
fault condition.
-Press [Off] on the LCP before programming parameters.
-Disconnect the drive from the mains whenever personal safety considerations make it necessary to avoid unintended
motor start.
-Check that the drive, motor, and any driven equipment are in operational readiness.
WARNING
DISCHARGE TIME
The drive contains DC-link capacitors, which can remain charged even when the drive is not powered. High voltage can be
present even when the warning indicator lights are off.
Failure to wait the specified time after power has been removed before performing service or repair work could result in death
or serious injury.
-Stop the motor.
-Disconnect AC mains, permanent magnet type motors, and remote DC-link supplies, including battery back-ups, UPS, and
DC-link connections to other drives.
-Wait for the capacitors to discharge fully. The minimum waiting time is specified in the table Discharge time and is also
visible on the nameplate on top of the drive.
-Before performing any service or repair work, use an appropriate voltage measuring device to make sure that the capacitors
are fully discharged.
Safety
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Table 2: Discharge Time, VLT® AutomationDrive FC 302
Voltage
[V]
Minimum waiting time (minutes)
4 7 15 20 30 40
200–240 0.25–3.7 kW
(0.34–5 hp)
– 5.5–37 kW (7.5–
50 hp)
– – –
380–500 0.25–7.5 kW
(0.34–10 hp)
– 11–75 kW (15–
100 hp)
90–200 kW (150–350
hp)
250–500 kW
(450–750 hp)
250–800 kW (450–
1350 hp) 315–500
(500–750 hp)
400 – – – 90–315 kW (125–450
hp)
– –
500 – – – 110–355 kW (150–
450 hp)
– –
525 – – – 55–315 kW (75–400
hp)
– –
525–600 0.75–7.5 kW (1–
10 hp)
– 11–75 kW (15–
100 hp)
– – –
525–690 – 1.5–7.5 kW
(2–10 hp)
11–75 kW (15–
100 hp)
37–315 kW (50–450
hp)
355–1200 kW
(450–1550 hp)
355–2000 kW
(450–2050 hp)
355–710 kW (400–
950 hp)
690 – – – 55–315 kW (75–400
hp)
– –
Table 3: Discharge Time, VLT® Decentral Drive FCD 302
Voltage [V] Minimum waiting time (minutes)
4 7 15
200–240 0.25–3.7 kW (0.34–5.0 hp) – 5.5–37 kW (7.5–50 hp)
380–500 0.25–7.5 kW (0.34–10 hp) – 11–75 kW (15–100 hp)
525–600 0.75–7.5 kW (1.0–10 hp) – 11–75 kW (15–100 hp)
525–690 – 1.5–7.5 kW (2.0–10 hp) 11–75 kW (15–100 hp)
WARNING
UNINTENDED MOVEMENT
When external fores act on the motor, and unwanted movement, for example, caused by gravity, can cause a hazard. Failure to
take extra measures for fall protection can result in death r serious injury.
-Equip the motor with fall protection, for example, extra mechanical brakes.
Safety
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WARNING
EMERGENCY OFF
The STO function does not provide electrical safety, and is not sufficient to implement the Emergency-Off function as defined
by EN 60204-1. Failure to implement the Emergency-Off function properly can result in death or serious injury.
-Ensure safe isolation of electricity, for example, by installing an emergency stop contactor to disconnect mains.
CAUTION
The operator or electrical installer is responsible for proper grounding and compliance with all applicable national and local
safety regulations.
2.6 Risk Assessment
NOTICE
The safety option is intended to be part of the safety-related control system of a machine. Before installation, perform a risk
assessment to determine whether the specifications of this safety option are suitable for all foreseeable operational and
environmental characteristics for the system in which it will be installed.
The system user is responsible for:
• Set-up, safety rating, and validation of any actuators connected to the system.
• Completing a system-level risk assessment and reassessing the system anytime a change is made.
• Providing supposition (as needed for the application) that the system fulfills the requested safety rating.
• Project management and proof testing.
• Programming the application software and the safety option configurations in accordance with the information in this manual.
• Access to the control system.
• Access to the safety option customization (configuration changes).
• Analyzing all configuration settings and selecting the proper setting to achieve the required safety rating.
2.6.1 Validation of Performance Level
Check whether the required Performance Level “PLr”, determined in the risk assessment, is achieved by the selected system for each
safety sub-function used. Check the calculation using the SISTEMA SW Tool of IFA (Institute for Occupational Safety & Health). Danfoss
provides a component library, which can be used for the calculation. Danfoss offers corresponding services to support the system
check by calculation. The library can be downloaded from www.dguv.de.
If using another validation method for the performance level, use the characteristic safety values specified.
Safety
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3 Functions
3.1 Safety Functions
International standards EN ISO 13850 and EN IEC 60204-1 specify the functional requirements and design principles of emergency stop
devices.
In control systems where there is a risk of equipment damage or personal injury, safety-related parts of control systems (SRP/CS) are
required to minimize the risk. SRP/CS include the following general components:
Detect
Process
Switch
Sensor
Logic
Actuator
for example lightcurtain
for example MCB 15x
for exmple FC 302
e30be101.11
Illustration 5: Sensor-Logic-Actuator Safety Chain
Safety functions are defined based on both the application and the hazard. They are often specified in a Type C standard (a product
standard), which provides precise specifications for special machines. If a C standard is not available, the macine designer defines the
safety functions. Typical safety functions are described in more detail in EN ISO 13849-1, section 5, Specification of Safety Functions.
The safety functions for drive systems are described in IEC 61800-5-2.
NOTICE
When designing the machine application, consider timing and distance for a coast to stop (Stop Category 0 or Safe Torque Off
(STO)). For more information regarding stop categories, refer to EN IEC 60204-1.
3.2 Safe Torque Off - STO
The safety function Safe Torque Off disconnects power to the motor. It is implemented via the shutdown path of the drive and the safe
outputs of the safety option.
Features of the safety subfunction
• The motor becomes torque-free and no longer generates any hazardous movements.
• The safety function STO corresponds to a Category 0 stop (uncontrolled stop) in accordance with EN IEC 60204-1.
• The safety subfunction Safe Torque Off corresponds to a category 0 stop (uncontrolled stop) in accordance with EN IEC 60204-1.
Functions
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Prerequisites for normal operation
• The fail-safe PLC has acknowledged operation of safety inputs.
• STO is not activated through the safe fieldbus.
• STO is not activated via inputs DI1 or DI2 if those inputs are configured.
• PROFIsafe communication is established and functional.
• The safety option detected no faults and there is no pending safety function.
When the prerequisites for normal operation are met, safe output S37 is active (signal 1, +24 V DC).
Safety function is activated in following cases
• An internal fault on the safety option.
• Power-up self-test (PUST).
• External faults at digital inputs.
• Changes in configuration via MCT 10 Safe Plug-in if the current drive is running.
• There is a 1/0 transition on a digital input or the STO signal through the safe fieldbus
• PROFIsafe communication is not established.
STO disables the control voltage of the drive output. This prevents the drive from generating the voltage required to rotate the motor
(see illustration 6). STO is suitable for performing mechanical work on the drive system or affected area of a machine only. It does not
provide electrical safety. STO should not be used as a control for starting and/or stopping the drive.
f
e30bc318.11
t
12
A
AActual frequency
2Motor standstill
1Activation of STO
Illustration 6: Safe Torque Off
Functions
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3.3 Specification of Safety functions
The standards require a specification of functional requirements. The specification must contain details about each safety function that
should be executed. Also define the:
• Necessary interfaces with other control functions.
• Required fault responses.
• Performance level required PLr or achievable SIL level.
3.4 Activation of Safety functions
• The safety functions are activated using the dual-channel safe inputs on the safety option or using the PROFIsafe communication.
• These inputs operate in accordance with the idle-current principle (activate when switching off). The safety control system
activates the safety functions via a 1/0 transition.
3.5 Activation of STO from Multiple Sources
If multiple sources activate STO (via digital inputs and safe fieldbus), all sources must deactivate STO in the safety option to return to
normal operation. After all sources deactivate STO, a reset of the safety option might be required depending on the settings of the
digital inputs.
3.6 Functional Proof Tests
The functional safety standards require that functional proof tests are performed on the equipment used in the system. Proof tests are
performed at user-defined intervals and depend on PFD and PFH values.
3.7 PFD and PFH Definitions
Safety-related systems can be classified as operating in either a low-demand mode or in a high-demand/continuous mode.
Low-demand mode
The frequency of demands for operation made on a safety-related system is maximum once per year. The SIL value for a low-demand
safety-related system is directly related to order-of-magnitude ranges on its average probability of failure on demand (PFD).
High-demand/continuous mode
The frequency of operation made on a safety-related system is higher than once per year. The SIL value for a high-demand/continuous
mode safety-related system is directly related to the probability of a dangerous failure per hour (PFH).
3.8 Internal Faults
Any internal fault in the safety option activates the safety function STO. The drive coasts the motor.
Internal faults always require a power cycle of the drive to reset the fault. Alternatively, use parameter 42-90 Restart Safe Option to
restart the safety option after internal fault without power cycling the drive.
Functions
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3.9 Inputs and Outputs
3.9.1 Allowed Sensor Types on Digital Inputs
The following list describes how digital inputs are activate depending on sensor types.
• NCNC: A digital input is active when there is 0 V at both channels of the input.
• Antivalent switches: A digital input is active only when there is 0 V at channel A and 24 V at channel B.
• NC: The functionality is similar to NCNC.
Sensors with 2 NO switches are not applicable.
The safe digital inputs are configured for both directly connecting safety sensors, for example emergency stop control devices or light
curtains, and for connecting preprocessing safety relays, for example, safe controls. See examples of connecting the safe digital input,
in accordance with EN ISO 13849-1 and EN IEC 62061 in 8.1 Connecting Safe Digital Inputs.
3.9.2 Inputs
The dual-channel digital inputs are used to activate the safety functions. 1 or both digital inputs can be disabled.
DI 1 can have 1 of the following functions:
• STO: Safe Torque Off.
• SO Mon: Safe option monitoring through the safe fieldbus.
DI2 can have 1 of the following functions:
• STO: Safe Torque Off.
• SO Mon: Safe option monitoring.
• Reset: Extra safe input to reset the safety option after a fault, or after deactivating a safety function on input DI1.
3.9.3 Safe Option Monitoring (SO Mon)
The PLC can use the digital inputs of the safety option as safe inputs. If a digital input is set to Safe Option Monitoring (SO Mon), the
safety option maintains all signal checks (discrepancy, and so on) on the digital inputs, but the safety option does not activate safety
functions if a signal changes. All safety logic is carried out by the PLC.
3.9.4 Output
S37 is the safe, single-channel output that goes to the STO input of the drive. For information about the events that trigger STO, see 3.2
Safe Torque Off - STO.
3.9.5 Signal Filtering
If a sensor with NCNC or antivalent is selected, the safety option checks the signals of the safe digital input for consistency. If NCNC is
selected, consistent signals at both inputs always assume the same signal state (high or low). If antivalent is selected, it checks the right
state of each input.
With electromechanical sensors (for example, emergency stop buttons or door switches), the 2 sensor switches never switch at the
same time (discrepancy). A long-term discrepancy points towards a fault in the wiring of a safe input, for example, a wire break. An
Functions
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adjustable filter in the safety option prevents faults caused by temporary or short-term discrepancy. Within the filter tolerance time
(parameter 42-22 Discrepancy Time), the safety option suppresses the discrepancy monitoring of the safe inputs.
If the signals have different levels after the discrepancy time expires, the option responds with an external error.
NOTICE
The discrepancy time does not extend the safety option response time. The safety option activates its safety -function when
there is a signal transition on 1 of the 2 channels of a digital input.
e30bc316.11
Input signal
DI1/DI2
D1 x A
D1 x B
Discrepancy time
Safety function
Active
Inactive
Illustration 7: Discrepancy Time
3.9.6 Stable Signal Time from Safe Outputs
The safety option normally responds immediately to signal changes at its safe input DI1 or DI2. This response is not required in the
following cases:
• When interconnecting the safe input of the option with an electromechanical sensor, contact bounce may result in signal changes
occurring, to which the option could respond.
• Several control modules test their safe outputs using test pulse pattern (on/off tests), to identify faults due to either short or cross
circuiting. When interconnecting the safe input of the option with a safe output of a control module, the option could respond to
these test signals.
A signal change during a test pulse pattern usually lasts 1 ms.
Under stable signal time, short pulses, which could lead to safety functions being incorrectly activated, can be filtered.
Functions
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NOTICE
The stable signal time extends the safety option response time. The safety option only activates the safety function after the
response time has expired.
If the signal to the input on safety option is not stable, the option responds with an external fault after the stable signal time expires.
Definition of a Stable Signal
Following a change to the DI input signals, the option triggers an internal monitoring time. Use parameter 42-23 Stable Signal Time to
select an appropriate stable signal time. A constant signal level is a high or a low state, at least for the time specified in parameter 42-23
Stable Signal Time.
Input signal
e30bc317.11
DI1/DI2
Safety function
Active
Inactive
Test pulse pattern
Stable signal time Stable signal time
Illustration 8: Filter for Suppressing Temporary Signal Changes
Functions
Installation Guide | VLT®Safety Option MCB 152
AN327351953089en-000101 / 130R0578| 19
Danfoss A/S © 2020.02

4 Installation
4.1 Safety Instructions
WARNING
RISK OF DEATH OR INJURY
The AC drive contains high voltage when connected to AC mains supply, DC supply, or load sharing. Failure to follow the
instructions in this warning may result in death or serious injury.
-Before installation, disconnect the power supply voltage to the drive.
-Switch off all dangerous voltages connected from external control circuits to the inputs and outputs of the drive.
-Never install an option card into the drive during operation.
-In addition to conventional installation tools, have the VLT® AutomationDrive FC 301/FC 302 Operating Guide or the VLT®
Decentral Drive FCD 302 Operating Guide, and the VLT® Motion Control Tools MCT 10 Operating Guide available as they
contain important information that is not included in this manual.
WARNING
ELECTRICAL HAZARD
Activation of STO does not provide electrical safety. The safety device connected to the dual-pole input of the safety option
must fulfill the required safety level for the application for interrupting the voltage/current to the safety option. This is also valid
for the connections between the safety option's safe output S37 and terminal 37 on the drive.
-To connect the safety device correctly to the safety option, read and follow the instructions in this manual.
NOTICE
The safety option is exclusively intended for use in option slot B.
4.2 Installation Overview
This section contains the general overview of the installation and commissioning processes.
NOTICE
It is not possible to install the VLT® Safety Option MCB 152 into a VLT® Decentral Drive FCD 302. It is placed into the drive by
factory. For VLT® Decentral Drive FCD 302, chapters 4.2 to 4.4 can be skipped.
Installation
Installation Guide | VLT®Safety Option MCB 152
AN327351953089en-000101 / 130R0578
20 | Danfoss A/S © 2020.02