Festo VOFC-LT-M32C Käyttöohje
Festo
Ei luokiteltu
VOFC-LT-M32C
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Sivu 1/2
VOFC-LT-M32C
Valve
Festo SE & Co. KG
Ruiter Straße 82
73734 Esslingen
Germany
+49 711 347-0
www.festo.com
Operating instruction
8115806
2023-02a
[8101559]
8115806
Translation of the original instructions
© 2023 all rights reserved to Festo SE & Co. KG
1
About this document
1.1
Purpose of the document
This document describes the use of the above-mentioned product. It contains
additional information for the use of the product in safety-related systems (safety
manual in accordance with IEC61508).
1.2 Applicable documents
–Assembly instructions
All available documents for the product
è
www.festo.com/sp.
1.3
Target group
This document is targeted towards individuals who mount and operate the
product. It is additionally targeted towards individuals who are entrusted with
the planning and application of the product in a safety-oriented system.
1.4
Specified standards
Version
IEC 61508-1:2010 IEC 61508-4:2010
IEC 61508-2:2010 IEC 61511:2016
Tab. 1:
Specified standards
2
Safety
2.1 Safety instructions
–
Only use the product in its original condition without unauthorised modifica-
tions.
–
Only use the product if it is in perfect technical condition.
–Observe the identifications on the product.
–
Only use media in accordance with the specifications
è
10Technical data.
–The product must be regularly tested by a qualified technician, and the test
must be documented
è
9Maintenance.
Return to Festo
–
In the event of malfunctions or failure: replace the product and inform Festo of
the failure.
–
Before returning the product, contact your Festo specialist advisor.
2.2 Intended use
The valves VOFC-LT-M32C are directly actuated electromechanical control valves.
The consist of a basic valve of the VOFC-LT-M32C series in combination with a
solenoid coil of the VACC-S13 series. The valves are used to control pneumatic
actuators.
2.3
Training of qualified personnel
Work on the product may only be carried out by qualified personnel who can
evaluate the work and detect dangers. The qualified personnel have knowledge
and experience in process automation.
3
Additional information
–Contact the regional Festo contact if you have technical problems
è
www.festo.com.
–
Accessories and spare parts
è
www.festo.com/catalogue.
4 Information on functional safety
4.1 Achievable safety classification
The product is suitable for use as an element in a safety-oriented system in
accordance with IEC 61511.
–in low-demand mode up to SIL 2
–in high-demand mode up to SIL 2.
Taking into account the necessary minimum hardware fault tolerance of HFT = 1,
the product can also be used up to SIL 3 with a redundant design of the entire
system.
NOTICE
It is only possible to determine whether the product is suitable for specific appli-
cations by also assessing further components of the subsystem.
4.2
Safety function
The safety function comprises the safe venting of an actuator connected to port 2.
The safety function is triggered by switching off the power supply at the solenoid
coil.
The connection between ports 2 and 3 remains open while the voltage remains
switched off at the solenoid coil. This switching position represents the safe state.
4.3
Operating conditions
–General information on safe operation
è
2Safety.
–
Periodic tests (performance test)
è
9Maintenance.
–Ambient conditions and additional technical specifications
è
10Technical
data.
4.4
Limitations of use
If the operating conditions are in compliance, the service life is a maximum of
14years.
5 Function
The valve is a 3/2-way valve with internal pilot air supply. If the operating pressure
is less than 2bar, an external pilot air supply with 2 bar must be connected.>
When the system is de-energised, the armature is pressed onto the nozzle by a
spring. This closes the internal pilot air line leading to the diaphragm.
–If voltage is applied at the solenoid coil: the armature opens the nozzle. The
diaphragm pushes the control piston against a spring in the final control ele-
ment. Exhaust port3 is closed and the flow rate between ports 1 and 2 is
unblocked.
–
If there is no voltage at the solenoid coil: the compressed air supply from port1
is closed. Port 2is connected with exhaust port3. This allows a downstream
control unit to be exhausted.
Fig. 1:
Circuit symbol
6 Assembly
1
2
3
4
Fig. 2:
Mounting the solenoid coil on
the valve body
1
Vent screw
2
Spring washer
3
Solenoid coil
4
Armature guide tube
1. Ensure that moisture cannot accumulate in the valve.
2. Slide solenoid coil [3] onto the armature guide tube [4]. Check: sealing com-
pound points to the valve body.
3. Slide spring washer [2] onto the armature guide tube.
4.
Tighten vent screw [1]. Tightening torque: 5Nm ±20%.
7 Installation
7.1
Requirements
–The piping is unpressurised.
–
Connecting cables and fittings are clean.
–The power supply is switched off.
Tuotetiedot
| Merkki: | Festo |
| Kategoria: | Ei luokiteltu |
| Malli: | VOFC-LT-M32C |
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