Festo MS6-SV Series User manual

8111040
MS6-SV-...-D-10V24
Soft start/quick exhaust valve
8111040
2019-05b
[8111042]
Instructions|
Assembly, Installation,
Safety func.

Translation of the original instructions
2 Festo — MS6-SV-...-D-10V24 — 2019-05b

3Festo — MS6-SV-...-D-10V24 — 2019-05b
1 Applicable documents................................................................................................. 4
1.1 Specified standards...................................................................................................... 4
2 Safety........................................................................................................................... 4
2.1 Safety instructions........................................................................................................ 4
2.2 Intended use................................................................................................................ 4
2.3 Foreseeable misuse...................................................................................................... 5
2.4 Training of qualified personnel..................................................................................... 5
3 Additional information................................................................................................ 5
4 Service..........................................................................................................................5
5 Product overview......................................................................................................... 6
5.1 Design........................................................................................................................... 6
5.1.1 Product design........................................................................................................6
5.2 Function....................................................................................................................... 7
5.3 Safety function in accordance with EN ISO 13849........................................................ 12
6 Assembly..................................................................................................................... 15
6.1 Assembly with MS-series service unit components....................................................... 16
7 Installation.................................................................................................................. 16
7.1 Pneumatic installation.................................................................................................. 16
7.2 Electrical installation.................................................................................................... 17
8 Commissioning............................................................................................................ 18
9 Operation..................................................................................................................... 18
10 Maintenance................................................................................................................ 18
10.1 Maintenance work........................................................................................................ 18
10.2 Cleaning....................................................................................................................... 19
11 Malfunctions............................................................................................................... 19
11.1 Fault clearance............................................................................................................. 19
12 Disassembly................................................................................................................ 19
13 Disposal........................................................................................................................20
14 Technical data............................................................................................................. 20
14.1 Technical data, mechanical........................................................................................... 20
14.2 Technical data, pneumatic............................................................................................ 20
14.3 Technical data, electrical.............................................................................................. 22
14.4 Safety engineering characteristics................................................................................ 23
14.5 Filling flow.................................................................................................................... 24
14.6 Exhaust time................................................................................................................. 25
Table of contents

1 Applicable documents
All available documents for the product èwww.festo.com/pk.
1.1 Specified standards
Version
2006/42/EG
EN 1037 + A1:2008-04
EN ISO 4414:2010-11
EN ISO 13849-1:2015-12
EN ISO 13849-2:2012-10
Tab. 1 Standards/directives specified in the document
2 Safety
2.1 Safety instructions
– Only use the product in original status without unauthorised modifications.
– Only use the product if it is in perfect technical condition.
– Observe labelling on the product.
– Take into consideration the ambient conditions at the location of use.
– Prior to mounting, installation and maintenance work: Switch off power supply and secure it from
being switched back on.
– Observe tightening torques. Unless otherwise specified, the tolerance is±20%.
2.2 Intended use
The product is intended solely for venting quickly and safely and for building up pressure gently in
pneumatic piping systems and terminal equipment in industry.
The product is intended for installation in a machine or automated system and must be used exclus-
ively as follows:
– In an industrial environment
– Within the limits of the product defined by the technical data è 14 Technical data.
– In its original condition, without unauthorised modifications
– In perfect technical condition
– In standard operation, which includes standstill, set-up and service operation, as well as emer-
gency operation
Applicable documents
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2.3 Foreseeable misuse
The following examples of foreseeable misuse are among those not approved as intended use:
– Outdoor use
– Use as press safety valve
– Bypass of the safety function
– Use in reversible operation (using supply air instead of exhaust air, and vice versa)
– Vacuum operation
2.4 Training of qualified personnel
Installation, commissioning, service and disassembly should only be conducted by skilled personnel.
The skilled personnel must be familiar with the installation of electrical and pneumatic control sys-
tems.
3 Additional information
– Accessories èwww.festo.com/catalogue.
– Spare parts èwww.festo.com/spareparts.
4 Service
Contact your regional Festo contact person if you have technical questions èwww.festo.com.
Additional information
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5 Product overview
5.1 Design
5.1.1 Product design
1Coil connection pilot valve V1
2Coil connection pilot valve V2
3Pneumatic port 2 (output pressure p2)
4Pressure indicator (optional)
5Proximity sensor S2
6Proximity sensor S1
Fig. 1 Operating elements and connections
Product overview
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7Pneumatic silencer mounted at pneumatic
Port 3
8Slot for proximity sensor S3
9Valve body
10 Pneumatic port 1 (operating pressure p1)
11 Flow control screw for soft-start function
Fig. 2 Operating elements and connections
5.2 Function
The product changes from the normal position to the switching position when both coils are energised
simultaneously. The normal position is achieved by switching off both coils.
The product has two safety functions:
– Pressure release
– Protection from unexpected start-up (non-switching)
The product has queries from proximity sensors, which are intended for diagnostics of the internal
valves. Performance level d/e in category 3 can be achieved by using proximity sensors S1 and S2.
Performance level e in category 4 can be achieved by using an additional proximity sensor S3.
Product overview
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Designations
Connection Identifier Functional prin-
ciple
Position
Port 1 (operating pres-
sure p1)
1
Port 2 (output pressure
p2)
2
Port 3 (exhaust p3) 3
Pneumatic
Coil connection pilot
valve V1
V1
Coil connection pilot
valve V2
V2
Electrical
Proximity sensor S1 S1
Proximity sensor S2 S2
Proximity sensor S31) S3
Magnetic
Flow control DR Mechanical
è 5.1.1 Product design.
1) Optional.
Tab. 2 Interfaces
Switching logic
In the normal position (completely exhausted product), the pilot valves V1 and V2 are not actuated. If
both pilot valves are actuated, the product switches first to the switching position 1 and then, when
the switch-through pressure is reached, automatically into switching position 2 è Fig.3.
Product overview
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V1 V2 S1 S2 S3 MS6-SV-D
Voltage [V] Switching position Status
0 0 1 1 1 Normal position
Port 1 blocked, passage from port 2 to 3 opened.
24 0 0 1 1 Normal position, optional testing condition
è Tab. 6 Recommendation for activation and diagnostics.
Port 1 blocked, passage from port 2 to 3 opened.
0 24 1 0 1 Normal position, optional testing condition
è Tab. 6 Recommendation for activation and diagnostics.
Reduced flow rate via flow control valve from port 1 to 2, pas-
sage from port 2 to 3 opened.
24 24 0 0 4 Switching position 1.
Reduced flow rate over flow control valve from connection 1 to
2, passage from connection 2 to 3 blocked.
24 24 0 0 0 Switching position 2.
Full flow from connection 1 to 2, passage from connection 2 to
3 closed.
Tab. 3 Switching logic
Function
Symbol Function
Soft-start/quick exhaust valve, electrically actu-
ated.
Tab. 4 Circuit symbol for the function
Switching behaviour
Switching behaviour of the product's internal valves. The normally exhausted position is sensed by
the proximity sensors. Switching logic è Tab. 3 Switching logic.
Product overview
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1Time
Fig. 3 Input and output switching characteristics in normal status
Proximity switch reaction times1)
Switch on Switch off
t1Depending on p1, flow control valve set-
ting and system volume at p2.
tS1.1 Maximum of 4s after signal at V1. tS1.2 Maximum of 4s after signal drop at V1.
tS2.1 Maximum of 4s after signal at V2. tS2.2 Maximum of 4s after signal drop at V2.
tS3.1 After signal at V1 and V2. Depending on
p1, flow control valve setting and system
volume at p2.
tS3.2 Maximum of 5s after signal drop at V1
and V2. Depending on system volume at
p2.
1) After the reaction time the signals are applied statically. The maximum specified reaction times must be considered in the diagnostics.
These reaction times are normally shorter.
Tab. 5 Proximity switch reaction times
Switch-through pressure
There is a flow control screw in the cover of the product. The flow control screw can be used to gener-
ate a gradual pressure build-up of output pressure p2 è 14.5 Filling flow.
The flow rate and thus the pressure rise can be adjusted by turning the flow control screw. When the
output pressure p2 reaches about 50% of the operating pressure p1, the maximum flow rate perform-
ance is enabled.
Product overview
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1Ratio of p2 to p1 [%] 2Filling time t
Fig. 4 Switch-through pressure tolerance field
Activation and diagnostics
If the results of activation and the sensor signals S1, S2 and S3 are not plausible, carry out the follow-
ing measures:
1. Switch off voltage to pilot valves V1 and V2.
2. Output error message.
3. Prevent new switching.
Sequence Activity Status and status transitions
Diagnostics at each switching operation
1. Apply voltage to pilot valves V1 and V2. V1=1; V2=1
2. Record edge change at proximity sensors
S1 and S2.
S1=1 è0; S2=1 è0
Optional, when using a third proximity switch S3
3. Record edge change at proximity switch S3. S3=1 è0
Corresponding reaction times è Fig.3.
Diagnostics at each resetting to the normal position
1. Switch off voltage to pilot valves V1 and
V2.
V1=0; V2=0
2. Record edge change at proximity sensors
S1 and S2.
S1=0 è1; S2=0 è1
Product overview
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Sequence Activity Status and status transitions
Optional, when using a third proximity switch S3
3. Record edge change at proximity switch S3. S3=0 è1
Corresponding reaction times è Fig.3.
Diagnostics in normal position
Pay attention to forced switch on/off è 14.4 Safety engineering characteristics.
1. Apply voltage to pilot valve V1. V1=1
2. Record edge change at proximity switch S1. S1=1 è0
3. Switch off voltage to pilot valve V1. V1=0
4. Record edge change at proximity switch S1. S1=0 è1
5. Apply voltage to pilot valve V2. V2=1
6. Record edge change at proximity switch S2. S2=1 è0
7. Switch off voltage to pilot valve V2. V2=0
8. Record edge change at proximity switch S2. S2=0 è1
Corresponding reaction times è Fig.3.
Tab. 6 Recommendation for activation and diagnostics
5.3 Safety function in accordance with EN ISO 13849
The product achieves a performance level for the following safety functions:
– Safe venting
– Protection against unexpected start-up (pressurisation) after EN 1037
NOTICE!
Failure of the safety function.
Common cause failures (CCF) cause the failure of the safety function, since in this case both channels
in a two-channel system fail simultaneously.
If measures to control the CCFs are not observed, the safety function of the soft-start/quick exhaust
valve can be impaired.
• Make sure that the described measures are observed
è Failures due to a common cause (Common Cause Failure – CCF).
è 14.4 Safety engineering characteristics
NOTICE!
Failure of the safety function.
Non-compliance with the technical data can lead to loss of the safety function.
• Observe the technical data è 14 Technical data.
Product overview
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Failures due to a common cause (Common Cause Failure – CCF)
To achieve the desired performance level, the applicable measures against CCF must be implemented
in accordance with the specifications of EN ISO 13849-2.
PFHd value
The PFHd value depends on the model of the product and the annual actuation rate (nop).
PFHd value MS6-SV-…-D
1PFHd [10 -7] 2Actuation rate (nop) [10 4/a]
Fig. 5 PFHd value MS6-SV-…-D
Product overview
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PFHd value MS6-SV-…-D-S3
1PFHd [10 -8] 2Actuation rate (nop) [10 4/a]
Fig. 6 PFHd value MS6-SV-…-D-S3
Product overview
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6 Assembly
NOTICE!
Failure of the safety function.
Failure to comply with the minimum distance of 15mm between the silencer and base can result in
the loss of the safety function.
• Observe minimum distance of 15mm below the silencer è Fig.7.
The free space ensures the exhaust can escape.
Fig. 7 Installation
• Observe the direction of flow from port 1 to port 2. Items 11 and 22 on the housing è Fig.8 are
provided for orientation.
Fig. 8 Flow direction
Assembly
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6.1 Assembly with MS-series service unit components
WARNING!
Failure of the safety function.
Incorrect installation in the service unit combination can result in failure of the exhaust safety func-
tion.
• Only devices that do not impair the exhaust process, even after a possible malfunction of the
device, may be placed downstream from the MS6-SV-….
Fig. 9 Assembly
1. Slide the cover cap MS6-END 1 upwards and remove it.
2. Insert a seal 2 between the individual devices (module connector MS6-MV in scope of delivery).
3. Place module connector 2 in the slots of the individual devices.
4. Fasten the module connector with two screws (product scope of delivery).
Tightening torque: maximum 1.2Nm.
7 Installation
7.1 Pneumatic installation
Port 1 and 2
If using screw connectors:
– Note the screw-in depth of the connector thread: 10mm.
– Make sure that the compressed air lines are connected correctly.
– Screw the connectors into the pneumatic ports using a suitable sealing material.
Installation
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Port 3
Exhausting a system using the product results in high noise levels.
• Recommendation: use silencer èwww.festo.com/catalogue.
– Screw the silencer into pneumatic port 3.
– Make sure that there is unrestricted exhausting. Neither the silencer nor port 3 may be blocked.
7.2 Electrical installation
WARNING!
Risk of injury due to electric shock.
• For the electrical power supply, use only PELV circuits in accordance with IEC 60204-1/EN 60204-1
(Protective Extra-Low Voltage, PELV).
• Observe the general requirements of IEC 60204-1/EN60204-1 for PELV circuits.
• Only use voltage sources that ensure a reliable electric separation from the mains network in
accordance with IEC 60204-1/EN 60204-1.
Connecting the product
• Connect pilot valves and proximity switches.
Example of circuits
Fig. 10 Example of circuits
Installation
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Designations
S1 Proximity sensor S1
S2 Proximity sensor S2
S3 Proximity sensor S3
V1 Pilot valve 1
V2 Pilot valve 2
Pot.-free Potential-free contact
Emergency stop Emergency stop (input circuit)
Feedback loop Feedback circuit
Safety device Safety relay unit or safety PLC
Digital output Digital output
Digital input Digital input
Standard PLC Programmable logic controller
Tab. 7 Designations in circuit examples
8 Commissioning
The product does not have its own control logic and must therefore be integrated into the control sys-
tem through appropriate measures.
Graphic display of commissioning è Fig.3.
Proceed as follows to commission the product:
• Apply operating pressure p1
ÄThe product is now ready for operation and can be actuated.
The filling speed of the pneumatic system can be adjusted with the flow control valve è Fig.2.
9 Operation
Perform a forced switch-off at least once a month if the process-related switching frequency is lower.
10 Maintenance
10.1 Maintenance work
A dirty silencer can extend the time needed for exhausting the system and thus restrict the safety func-
tion.
• Check the silencer regularly and replace if necessary.
Commissioning
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10.2 Cleaning
1. Switch off energy sources:
– Operating voltage
– Compressed air
2. Clean the outside of the product as required. Approved cleaning agents are soap solutions (max.
+50°C), petroleum ether and all non-abrasive cleaning agents.
11 Malfunctions
11.1 Fault clearance
– Check compressed air supply
– Check power supply
– Check installation of the signal lines
– Start device è 8 Commissioning.
– Implement possible remedies è Tab. 8 Fault clearance.
– If the fault occurs again: contact Festo service èwww.festo.com.
Malfunction Possible cause Remedy
Power supply is insufficient – Provide sufficient power supply.
Pressure supply interrupted – Restore compressed air supply.
Product does not
switch
Malfunction due to electrical or elec-
tromagnetic effects (EMC measures
not complied with).
– Note maximum length of the sig-
nal lines.
– Run the control and power lines
separately.
– Use screened cables.
– Provide low-impedance paths to
earth.
Pressure p1 collapses
briefly at every switch-
ing operation
The cross-section of the MS6-SV-D
pressure supply is too small.
– Tighten flow control screw a
little.
– Attach reservoir in front of inlet
p1.
– Modify the compressed air sup-
ply, e.g. increase cross-section
of the power supply cable.
Tab. 8 Fault clearance
12 Disassembly
1. Switch off energy sources
– Operating voltage
– Compressed air
2. Separate the applicable connections from the product.
Malfunctions
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13 Disposal
ENVIRONMENT!
Send the packaging and product for environmentally sound recycling in accordance with the current
regulations èwww.festo.com/sp.
14 Technical data
14.1 Technical data, mechanical
MS6-SV-D
Type of mounting In-line installation
With accessories
Constructive design Piston seat has no overlap
Position sensing principle Piston magnet principle
Reset method Mechanical spring
Mounting position Any
Sound pressure level [dB(A)] 75 with silencer UOS-1
Environmental conditions
Shock resistance Shock test with severity level 2 in accordance with
EN60068-2-27
Vibration resistance Transport application test with severity level 2 in accord-
ance with EN60068-2-6
Degree of protection
Degree of protection IP65(fully mounted and connected)
Protection class III
Materials
Housing Die-cast aluminium
Seal NBR
Tab. 9 Technical data, mechanical
14.2 Technical data, pneumatic
MS6-SV-E
Pneumatic port 1, 2 [G] ½
Pneumatic port 3 [G] 1
Disposal
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