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1 About this documentation
This documentation contains important information on the safe and appropriate
assembly and commissioning of the product.
Read this documentation completely, especially
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working with the product.
1.1 Documentation validity
See supplied declaration of conformity.
Furthermore, observe general, statutory and other binding rules of the European
and national laws, as well as the valid regulations in your country to protect the
environment and avoid accidents.
1.2 Required documentation
The safety valve is a component part of a larger system.
Note also instructions for other system components and manufacturer's sys-
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tem documentation.
1.3 Presentation of information
1.3.1 Warnings
In this documentation, there are warning notes before the steps whenever there
is a risk of personal injury or damage to equipment. The measures described to
avoid these hazards must be followed.
Structure of warnings
Hazard type and source
Consequences of non-observance
Precautions
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Meaning of the signal words
Immediate danger to the life and health of persons.
Failure to observe these notices will result in serious health consequences, in-
cluding death.
Possible danger to the life and health of persons.
Failure to observe these notices can result in serious health consequences, in-
cluding death.
Possible dangerous situation.
Failure to observe these notices may result in minor injuries or damage to
property.
Possibility of damage to property or malfunction.
Failure to observe these notices may result in damage to property or malfunc-
tions, but not in personal injury.
1.3.2 Symbols
Recommendation for the optimum use of our products.
Observe this information to ensure the smoothest possible operation.
1.4 Abbreviations
This documentation uses the following abbreviations:
Abbreviation
Meaning
CCF
Common Cause Failure
PL
Performance Level
PLr
Required performance level
PLC
Programmable Logical Controller
AVENTICS™ SV01/SV03/SV05 | R412027221-BAL-001-AC | English
g 2. Notes on safety
SIGNAL WORD
DANGER
WARNING
CAUTION
NOTICE
2 Notes on safety
2.1 About this chapter
before
The product has been manufactured according to the accepted rules of current
technology. Even so, there is risk of injury and damage to equipment if the fol-
lowing chapter and warnings in this documentation are not followed.
1. Read these instructions completely before working with the product.
2. Keep this documentation in a location where it is accessible to all users at all
times.
3. Always include the documentation when you pass the product on to third par-
ties.
2.2 Intended use
The SV01/SV03/SV05 series of dual valves are safety components designed and
manufactured in accordance with Machinery Directive 2006/42/EC and bear the
CE mark. The safety function of the safety valve is to shut off supply of pneumatic
energy and to exhaust any pneumatic energy from downstream of the valve. The
safety function of the 5/2 safety valve is to at least stop the actuator (one channel
of the dual valve stuck in a worst case position) or to return the actuator to its
home "safe" position when the valve operates fault free.
Dual valves from the SV01/SV03/SV05 series are redundant 3/2 or 5/2 directional
valves, which are designed to fulfil the above-mentioned safety functions. Typi-
cally, these valves are implemented to meet the Category 4 and/or performance
level e requirements of a machine's (or system's) safety circuit as determined by
a risk assessment of the hazards and tasks required of employees that interact
with the machine/system.
See chapter
g 12. Technical data
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with and adhered to by the product. See the declaration of conformity for
product-relevant EU directives.
The 3/2 safety valve is designed to supply air to a zone or entire machine/system
until signaled to shut off and exhaust residual downstream pneumatic energy
from the machine. Thus, reducing the hazards associated with the presence of
residual energy during employee access and/or minor servicing. The safety func-
tion of the 3/2 safety valve is to shut off the supply of pneumatic energy and dissi-
pate all pneumatic energy downstream of the valve.
NOTICE: The safety valve cannot dissipate pneumatic energy downstream of ob-
stacles such as check valves and valves in the closed center position.
The 5/2 safety valve is designed to control the direction of air flow into and out of
a double-acting cylinder or another pneumatic actuator in order to move the
cylinder forwards or backwards in line with the machine operating requirements.
The safety valves are designed for safe, redundant operation of valves for external
monitoring. The safety valves are constructed of redundant, 3/2 or 5/2 spool
valves, and have an overall function of a single solenoid, externally piloted spring
return valve. Each single valve in the safety valve is equipped with a PNP proxim-
ity sensor. Monitoring both of these sensors on each actuated and de-actuated
switching position of the safety valve provides a diagnostic coverage up to 99%.
Monitoring of these sensors is to be done by an external monitoring system.
2.2.1 Safety function according to ISO 13849
The safety valves are designed in accordance with the requirements listed in
ISO 13849-1 and -2.
3/2 directional safety valve
The safety function of the 3/2 safety valve is not only to supply compressed air
(pneumatic energy) to the machine/system when the two valve elements are ac-
tuated simultaneously, but also to shut off the supply and to exhaust any down-
stream compressed air when both valves are switched off. A fault in the system
where only one valve actuates when switching on or only one de-actuates when
switching off prevents air from being supplied downstream and simultaneously
exhausts any air that is already downstream. Monitoring of the two proximity
sensors by the user's external safety monitoring system makes it possible to de-
tect these fault situations and to shut off and prevent further electrical energiza-
tion of the solenoids.
5/2 directional safety valve
Danger of personal injury due to uncontrolled movements when switching
off the valve!
Switching off the 5/2 safety valve results in pressure application on the ring
side and pressure relief on the piston side of the controlled actuator if con-
nected as in g Fig. 6.
Take safety precautions on the machine side.
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for the standards and test values complied
WARNING
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