Festo OVEM-...-1N, OVEM-... -05...-BN, OVEM-... -05...-B, OVEM-... -07...-BN, OVEM-... -07...-B Instructions And Operating
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OVEM-...-1P/1N
Vacuum generator
Festo AG & Co. KG
Ruiter Straße 82
73734 Esslingen
Germany
+49 711 347-0
www.festo.com
Instructions | Operating
8109422
2019-03c
[8109424]
Translation of the original instructions
1 Applicable documents
All available documents for the product èwww.festo.com/pk.
Document Product Contents
Instruction manual Manifold rail OABM-P Assembly
Tab. 1 Applicable documents
2 Safety
2.1 Safety instructions
– The product may only be used in its original status without unauthorised
modifications.
– Only use the product if it is in perfect technical condition.
– Use the product only inside buildings.
– Take into consideration the ambient conditions at the location of use.
– The product is intended for use in industrial environments. This product can
generate high frequency malfunctions, which may make it necessary to imple-
ment interference suppression measures in residential areas.
– Observe the specifications on the product labelling.
– Comply with all applicable national and international regulations.
– Observe the local regulations for environmentally friendly disposal.
2.2 Intended use
The intended use of the product is to generate a vacuum.
2.3 UL certification
In combination with the UL inspection mark on the product, the information in this
section must also be observed in order to comply with the certification conditions
of Underwriters Laboratories Inc. (UL) for USA and Canada.
UL approval information
Product category code QUYX (USA)
File number E322346
Standards taken into account UL 61010-1
UL symbol
QUYX7 (Canada)
C22.2 No. 61010-1
Tab. 2 Approval information
The unit shall be supplied by a power source which fulfils the requirements on a
limited-energy circuit in accordance to IEC/EN/UL/CSA 61010-1 or on a Limited
Power Source (LPS) in accordance to IEC/EN/UL/CSA 60950-1 or IEC/EN/UL/CSA
62368-1 or a Class 2 circuit in accordance to NEC or CEC.
3 Service
Contact your regional Festo contact person if you have technical questions
èwww.festo.com.
8109422
4 Product design
Solenoid valve for ejector pulse
1
(eject)
Solenoid valve for vacuum
2
Mechanical manual override
3
Supply port (1)
4
Exhaust port/silencer (3)
5
Vacuum port (2)
6
Housing with mounting hole
7
Slide for changing the filter ele-
8
ment
Filter housing with display window
9
Flow control screw for adjusting
10
the ejector pulse
EDIT button
11
LED for switching output – Out
12
LED for switching input – vacuum
13
ON/OFF
LED for switching input – ejector
14
pulse (eject)
Electrical connection
15
Size OVEM-...-20/-30-C
16
Fig. 1 Operating elements and connections
LED and EDIT button not present on models without vacuum sensor
Filter housing with display window only on OVEM-...-B
4.1 Product variants
Product variant Code Meaning
Vacuum generator OVEM Vacuum generator with vacuum solenoid valve ON/OFF
Nominal width laval nozzle
Housing size / width
Pneumatic connections
-05 0.45mm
-07 0.7mm
-10 0.95mm
-14 1.4mm
-20 2.0mm
-30 3.0mm
-H high negative pressureVacuum type
-L high suction volume
-B 20 mm wide, ISO standard
-BN 20 mm wide, NPT
-C 36 mm wide, ISO standard
-QO
-GO
-PL
and electric manual override
all ports with QS push-in fittings (-B-QS/-C-QS)-QS
all ports with QS push-in fittings inch (-BN-QS)
Supply / vacuum port with QS push-in fittings, exhaust
port with open silencer (-B-QO/-C-QO)
Supply / vacuum port with QS push-in fittings inch,
exhaust port with open silencer (-BN-QO)
all ports with G female thread (-B-GN/-C-GN)-GN
all ports with NPT female thread (-BN-GN)
Supply / vacuum port with G female thread, exhaust
port with open silencer (-B-GO/-C-GO)
Supply / vacuum port with NPT female thread, exhaust
port with open silencer (-BN-GO)
prepared for common supply manifold, vacuum and
exhaust port with QS push-in fittings (-B-PL/-C-PL)
prepared for common supply manifold, vacuum and
exhaust port with QS push-in fittings inch (-BN-PL)
Product variant Code Meaning
Pneumatic connections -PO
Normal position of the
vacuum generator
Electrical connection -N M12 plug (5-pin)
Vacuum sensor
Alternative vacuum display
-ON NO, normally open (vacuum generation)
-OE NO, normally open (vacuum generation) with ejector
-CN NC, normally closed (no vacuum generation)
-CE NC, normally closed (no vacuum generation) with eject-
-1PD 1 switching output PNP, 2 switching inputs PNP, with
-2P 2 switching outputs PNP
-2N 2 switching outputs NPN
-PU 1 switching output PNP, 1 analogue output 0…10V
-PI 1 switching output PNP, 1 analogue output 4…20mA
- bar (-B), InHg (-BN)
-B bar
-W InH20
-H InHg
prepared for common supply manifold, vacuum port
with QS push-in fittings, exhaust port with open silencer
(-B-PO/-C-PO)
prepared for common supply manifold, vacuum port
with QS push-in fittings inch, exhaust port with open
silencer (-BN-PO)
pulse
or pulse
display
Tab. 3 Overview of variants
5 Fast commissioning with factory settings
The vacuum generator is supplied with the following factory settings:
– Switching characteristics of the electrical output: threshold value comparator
– Switching element function of the electrical output: NO (normally open)
– Switching point (SP): -0.4bar
– Fixed hysteresis (HYS): 20mbar
1. Mount the vacuum generator è 7 Assembly.
2. Connect the pneumatics for the vacuum generator
è 8.1 Pneumatic installation.
3. Connect the electrics for the vacuum generator è 8.2 Electrical installation.
The vacuum generator can be commissioned.
Ä
It is possible to teach a switching point so as not to use factory settings
è 9.2 Setting the vacuum sensor.
Fig. 2 Switching characteristics of switching inputs
Code Switching output Switching inputs
-1P Switching output
-1N Switching output
Positive switching
Negative switching
Switching inputs
Positive switching
Switching inputs
Negative switching
Tab. 4 Switching output and switching input variants
6.2 Switching point and hysteresis
Threshold value comparator
NO (normally open contact)
The factory settings cannot be restored.
6 Function and application
The vacuum generator is available with a range of pneumatic and electrical
switching functions.
The taught setpoint value for the generated vacuum is monitored via an integrated vacuum sensor (-1P, -1N). If the setpoint value is reached or if it is not
reached due to malfunctions (e.g. leakage, dropped workpiece), the vacuum
sensor emits an electrical signal and the Out LED indicates whether or not the
taught setpoint was reached.
The supply of compressed air for vacuum generation is controlled by an integrated solenoid valve. The solenoid valve is available in two different switching
functions, NC/NO. The vacuum is generated as soon as compressed air is applied
to the vacuum generator and the voltage is switched on (NC: -CE, -CN) or off (NO: OE, -ON) as defined by the switching function of the solenoid valve 2.
The integrated solenoid valve 1 can be used to control and generate an ejector
pulse to release the workpiece safely from the suction cup and to purge the vacuum rapidly.
6.1 Switching output and switching inputs
The vacuum is monitored with the aid of a piezo-resistive sensor element. The
vacuum sensor converts pneumatic pressure values to provide electrical signals.
When the taught switching point is reached, the vacuum sensor closes a circuit
and provides an electrical signal. This signal can be used for open- or closed-loop
control functions.
The vacuum generator can be connected to higher-order systems by means of a
switching output (-1P, -1N) and switching inputs. The switching output is configured as a normally open contact. The output’s switching function is defined as
a threshold value comparator.
The solenoid valves for control of the compressed air and ejector pulse are actuated as defined by the input signals.
Tab. 5 Settings for switching points SP, hysteresis Hy and functional reserve FR
The switching point is determined from the teach pressure and the functional
reserve. A functional reserve (35% of the teach pressure) is deducted from the
teach pressure (SP = TP – 0.35*TP). For example,with a teach pressure of
–0.5bar, a switching point of –0.33bar is set. The hysteresis has a fixed value.
7 Assembly
An unfavourable mounting position can impair the function of the product.
• Install the vacuum generator so condensation from the compressed air lines
cannot accumulate in the device.
• Install the vacuum generator so that it cannot be heated above the maximum
permissible operating temperature (plan for possible convection).
• Install the vacuum generator so that the exhaust can flow without hindrance.
Direct mounting
Fig. 3 Direct mounting on the side
Variant Screws Tightening torque
OVEM-...-05/-07/-10-...-B M5 max. 2.5Nm
OVEM-...-14/-20-...-B M4 max. 2.5Nm
OVEM-...-20/-30-...-C M6 max. 2.5Nm
Tab. 6 Size and tightening torque of the screws for direct mounting on the side
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