Festo OVEM-05 User manual

Vacuum suction nozzle
OVEM-...-1P/1N
Festo AG & Co. KG
Ruiter Straße 82
73734 Esslingen
Germany
[phone]
www.festo.com
Operating instructions
(Translation of the original instructions)
8085608
2018-01b
[8085610]
Vacuum suction nozzle OVEM-...-1P/1N English...........................
1 About this document
This document describes the use of the above-mentioned product.
For all available product documentation èwww.festo.com/pk
2 Safety
2.1 Intended use
The OVEM vacuum generator is used to generate a vacuum.
2.2 General safety information
 The product may only be used in its original status without unauthorized modi
fications.
 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. The product can
generate high frequency interference, which may make it necessary to imple
ment interference suppression measures in residential areas.
 Observe the specifications on the product labelling.
2.3 Range of applications and certifications
Note
CE Declaration of Conformity èwww.festo.com/sp
In connection with the UL marking on the product, the information of this section is
also applicable for compliance with the certification conditions of Underwriters
Laboratories Inc. (UL) for the U.S.A. and Canada.
UL approval information
Product category code QUYX (USA)
QUYX7 (Canada)
File number E322346
Considered standards UL 61010-1
C22.2 No.61010-1
UL mark
Fig. 1 UL approval information
Unit shall be supplied by a power source which complies with the requirements of
a limited-energy circuit in accordance with IEC/EN/UL/CSA 61010-1 or a Limited
Power Source (LPS) in accordance with IEC/EN/UL/CSA 60950-1 or IEC/EN/UL/
CSA 62368-1 or a Class 2 circuit in accordance with NEC or CEC.
3 Service
 Contact the regional Festo contact if you have technical questions
èwww.festo.com.
4 Accessories
Designation OVEM-05 OVEM-07/10 OVEM-14/-20
Connecting cable M12x1, 5-pin, 2.5 m NEBU-M12G5-K-2.5-LE5
Connecting cable M12x1, 5-pin, 5 m NEBU-M12G5-K-5-LE5
H-rail mounting OABM-H
Mounting bracket HRM-1
Silencer extension – UOMS-¼ UOMS-¼
Common supply manifold OABM-P-4
OABM-P-6
OABM-P-8
Blanking plug OASC-G1-P
Fig. 2 Accessories
Accessories èwww.festo.com/catalogue
5 Product description
5.1 Overview
aJ
9
8
aD
2 3
aA
1
aB
aC
aE
7
4 65
1Solenoid valve, ejector pulse
(Eject)
2Solenoid valve, vacuum
3Mechanical manual override of the
solenoid valves
4Supply port (1)
5Exhaust port / silencer (3)
6Vacuum port (2)
7Housing with mounting holes
8Slide for changing the filter
element
9Filter housing with inspection
window
aJ Flow control screw for adjusting
the ejector pulse
aA EDIT button1)
aB LED for switching output – out1)
aC LED for switching input – vacuum
on/off
aD LED for switching input – ejector
pulse
aE electrical connection
1) LED and EDIT button not present on models without vacuum sensor
Fig. 3 Control sections and connections

5.2 Features
Features Code Specification
Vacuum suction nozzle OVEM Vacuum suction nozzle with vacuum solenoid valve
ON/OFF and manual override
Nominal width of laval
nozzle
-05 0.45 mm
-07 0.7 mm
-10 0.95 mm
-14 1.4 mm
-20 2.0 mm
Vacuum type -H High vacuum
-L High suction volume
Housing size/width -B 20 mm wide, ISO standard
-BN 20 mm wide, NPT
Pneumatic ports -QS All ports with QS fittings (-B-QS)
All ports with QS fittings in inch sizes (-BN-QS)
-QO Supply / vacuum port with QS fittings, exhaust port with
open pneumatic silencer (-B-QO)
Supply / vacuum port with QS fittings in inch sizes,
exhaust port with open pneumatic silencer (-BN-QO)
-GN All ports with female G thread (-B-GN)
All ports with female NPT thread (-BN-GN)
-GO Supply/vacuum port with female G threads, exhaust port
with open pneumatic silencer (-B-GO)
Supply/vacuum port with female NPT threads, exhaust
port with open pneumatic silencer (-BN-GO)
-PL Prepared for supply strip, vacuum port and exhaust port
with QS fittings (-B-PL)
Prepared for supply strip, vacuum port and exhaust port
with QS fittings in inch sizes (-BN-PL)
-PO Prepared for supply strip, vacuum port with QS fitting,
exhaust port with open pneumatic silencer (-B-PO)
Prepared for supply strip, vacuum port with QS fitting in
inch size, exhaust port with open pneumatic silencer
(-BN-PO)
Normal position of the
vacuum suction nozzle
-ON NO, normally open (vacuum generation)
-OE NO, normally open (vacuum generation) with ejector pulse
-CN NC, normally closed (no vacuum generation)
-CE NC, normally closed (no vacuum generation) with ejector
pulse
Electrical connection -N Plug M12 (5-pin)
Vacuum sensor –No vacuum sensor (PNP switching input)
-1P 1 switching output PNP
-1N 1 switching output NPN
Fig. 4 Overview of variants
6 Fast commissioning with factory setting
The vacuum suction nozzle is available 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): –0.4 bar
 Fixed hysteresis (HYS): 20 mbar
1. Mount the vacuum suction nozzle (èChapter 8.1).
2. Connect the vacuum suction nozzle pneumatically (èChapter 8.2).
3. Connect the vacuum suction nozzle electrically (èChapter 8.3).
èThe vacuum suction nozzle can be placed in operation.
If you do not wish to use the factory settings, you can teach a switching point for
the switching output (èChapter 9.2).
The factory settings are not reproducible.
7 Function and application
The OVEM vacuum suction nozzle is intended for use to generate vacuum and is
only intended for use inside buildings.
The vacuum generated is used together with a suction gripper to create a force
that can grip a workpiece so that it can be transported. The vacuum suction nozzle
is available with a variety of pneumatic and electric 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 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 can be supplied with two different switching
functions, NC and NO. The vacuum is generated as soon as compressed air is ap
plied to the vacuum suction nozzle 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 1can be used to control and generate an ejector
pulse to release the workpiece safely from the suction cup and to purge the vacu
um rapidly.
7.1 Switching output and switching inputs
The vacuum is monitored with the aid of a piezoresistive sensor element. The vacu
um sensor converts pneumatic pressure values and supplies electrical signals.
When the taught switching point is reached, the vacuum sensor closes a circuit,
supplying an electrical signal. This signal can be used for control functions.
The vacuum suction nozzle can be connected to higher-level systems by means of
a switching output (-1P, -1N) and switching inputs. The switching output is con
figured as normally open. The output’s switching function is defined as a threshold
value comparator.
The input signals determine the actuation of the solenoid valves for control of the
compressed air and the ejector pulse.
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
Solenoid valve 1Solenoid valve 2
Input signal
Switching
position
Solenoid valve
Fig. 5 Switching characteristics of switching inputs
Code Switching output Switching inputs
-1P Switching output
Positive switching
Switching inputs
Positive switching
-1N Switching output
Negative switching
Switching inputs
Negative switching
Fig. 6 Variants, switching output and switching inputs

7.2 Switching point and hysteresis
Threshold value comparator
NO (normally open)
Fig. 7 Settings for switching points SP, hysteresis Hy and function reserve FR
Note
The switching point is determined from the teach pressure and the functional
reserve. A function reserve (35 % of the teach pressure) is deducted from the
teach pressure (SP = TP – 0.35*TP). For example, with a teach pressure of
–0.5 bar, a switching point of –0.33 bar is set.
The hysteresis has a fixed value.
8 Installation
It can be mounted in any position. Mount the vacuum suction nozzle and connect
its tubing in such a way that no condensation from the compressed air lines can
gather in the device.
Note
The noise level must be measured in the end product and taken into account.
Note
An unfavourable mounting position can result in increased sound pressure.
 During installation, make sure that the exhaust can flow without hindrance.
8.1 Mechanical
Direct mounting
Fig. 8 Direct mounting
 Mount the vacuum suction nozzle at the intended position with two screws (size
of the mounting screws èFig. 9), assembly torque max. 2.5 Nm.
We recommend the use of corresponding washers.
or
 Mount the vacuum suction nozzle on its back cover with 4 screws, size M3, with
max. torque 0.8 Nm.
OVEM Size of mounting screws
-05/-07/-10 M5
-14/-20 M4
Fig. 9 Size of mounting screws
Mounting with accessories
The required accessories are listed in èAccessories.
H-rail mounting
1
Fig. 10 H-rail mounting
1. Mount the H-rail mounting on the back cover of the vacuum suction nozzle with
4 screws, size M3, with max. assembly torque 0.8 Nm.
2. Hook the vacuum suction nozzle onto the H-rail and press in the direction of the
arrow.
3. Secure the vacuum suction nozzle to the H-rail with screw 1, fastening it with
max. torque 1 Nm.
Mounting bracket
Fig. 11 Mounting bracket
 Mount the vacuum suction nozzle at the intended position with two screws
(size of the mounting screws èFig. 9), assembly torque max. 2.5 Nm.
We recommend the use of corresponding washers.
Common supply manifold
The vacuum suction nozzle can also be mounted on a common supply manifold with up
to 8 positions. Information on mounting èMounting instructions OABM-P-….
8.2 Pneumatic
OVEM-... -05-...-GN
-05-...-GO
-07-...-GN
-07-...-GO
-10-...-GN
-10-...-GO
-14-...-GN
-14-...-GO
-20-...-GN
-20-...-GO
Tubing length [m] < 0,5 < 2 < 0,5 < 2 < 0,5 < 2 < 0,5 < 2 < 0,5 < 2
Min. internal diameter of tubing
– Supply port [mm] 1 2 1,5 2 2 3 3 4 4 5
– Vacuum port [mm] 2 3 3 4 4 5 5,5 6 6 7
– Exhaust port [mm] 2 3 3 4 4 5 5,5 6 6 7
Fig. 12 Minimum inside diameter of the connection tubes for connections with
G-female thread
Notes on the pneumatic connection
– Maximum admissible hose length 2 m
– OVEM-...-GN/GO: Pay attention to the minimum inside diameter of the connec
tion tubes èFig. 12.
– Do not seal exhaust port.
– OVEM-...-07/-10/-14/-20: If necessary, lengthen silencers with a silencer exten
sion (accessories èwww.festo.com/catalogue)
– Recommendation: Use tubes of type PUN èwww.festo.com/catalogue.

8.3 Electric
Warning
Use only power sources which guarantee reliable electrical isolation of the oper
ating voltage in accordance with IEC/EN 60204-1. Also observe the general re
quirements for PELV power circuits in accordance with IEC/EN 60204-1.
Note
Long signal lines reduce the resistance to interference.
 Make sure that the signal lines are always shorter than 30 m.
 Make sure that the operating voltage supply is 24 V DC ±15 %.
The solenoid coils and electrical components could be damaged if the maximum
permitted switching voltage is exceeded.
 Connect the cable socket to the plug connector aE.
 Wire the vacuum suction nozzle as shown in Fig. 13.
Plug connector
M12x1, 5-pin2)
Pin Cable colours 1) Allocation
5
2
3
4
11Brown (BN) Supply voltage +24 V DC
2White (WH) Switching input for vacuum ON/OFF
3Blue (BU) 0 V
4Black (BK) Switching output (Out)3)
5Grey (GY) Switching input for ejector pulse ON/OFF
1) Using the plug socket with cable as specified in Accessories.
2) Max. assembly torque 0.3 Nm.
3) Pin 4 not used in types without vacuum sensor
Fig. 13 Pin allocation
Circuit diagrams
OVEM-...-1P
OVEM-...-1N
OVEM without vacuum sensor
Fig. 14 Circuit diagrams for vacuum suction nozzle
9 Commissioning
 Observe the transport area of the workpiece and make sure that:
– Nobody is positioned underneath the workpiece
– There are no objects within the transporting path of the workpiece (e.g. by
means of a protective screen).
 Avoid long tubing and large volumes between the suction grippers and the vacu
um suction nozzle.
A large volume leads to long evacuation times and possibly incorrect settings on
the vacuum sensor.
 Take into account accelerations, external influences, etc. on the workpiece when
setting the required holding force.
Note
Unintentional pressing of the Edit button (for longer than two seconds) may
cause a modification of the preset switching pressure.
 Make sure that the Edit button is only pressed intentionally. Otherwise a swit
ching pressure of 0 bar would be set if there was no operating pressure, for
example.
Note
To prevent damage to the EDIT button, actuate the EDIT button with a blunt ob
ject only.
9.1 Building up the vacuum:
1. Pressurize the vacuum suction nozzle with an operating pressure at the supply
port 3.
2. Switch on the operating voltage.
3. Energise the switching input for vacuum ON/OFF.
èThe solenoid valve 2(-CN, -CE) is opened (or closed in the case of -OE,
-ON). The compressed air flows through the vacuum suction nozzle and
generates a corresponding vacuum at the vacuum port 5. The vacuum can
be set by changing the operating pressure.
9.2 Setting the vacuum sensor:
The setting of the vacuum sensor for monitoring the vacuum depends on the ap
plication.
The vacuum generator is preset at the factory (factory settings èChapter 6).
These settings can be adapted to the application quickly by teaching a switching
point.
Teaching a switching point:
1. Switch on the operating voltage.
2. Set the desired teach pressure (e.g. object gripped).
3. Press and hold the EDIT button aA 2 sec.
èThe LED Out aB flashes.
4. Release the EDIT button aA.
èThe current teach point (TP) minus the function reserve is saved as the
switching point (SP) and is applied for the switching output.
5. Carry out a test run, varying the pressure to check whether the vacuum suction
nozzle’s switching output switches as desired.
9.3 Setting the ejector pulse (-OE, -CE):
The vacuum suction nozzle must be in its initial position.
The workpiece must be held reliably against the suction gripper by the vacuum
generated.
The intensity of the ejector pulse can be adjusted.
You can set the intensity of the ejector pulse by adjusting the flow control
screw aJ.
1. Screw the flow control screw aJ clockwise completely in.
èThe ejector pulse channel is now closed. No ejector pulse is generated.
2. Unscrew the flow control screw until the required intensity of the ejector pulse is
reached.
3. Test the settings of the ejector pulse before commissioning.
9.4 Reducing the vacuum:
OVEM-...-CN/-ON
 Cut off the compressed air supply by switching the input voltage off (in the case
of -CN) or on (in the case of -ON).
èThe vacuum port 5is pressurized. The workpiece detaches itself from the
suction gripper.
OVEM-...-CE/-OE
When the solenoid valve for ejector pulse 1is switched on, an ejector pulse is
generated.
èThe vacuum port 5is pressurized. The workpiece detaches itself from the
suction gripper.
Note
When large suction cups are used, flow resistance in the suction cup as the cup
lifts away from the workpiece can cause the build-up of a vacuum independent of
the generating device. This might mean that the workpiece being set down does
not detach from the suction cup, even when the ejector pulse is set to a long
duration.
Therefore, switch on the solenoid valve for ejector pulse 1shortly before the
suction cup is lifted away, to ensure that the ejector pulse is active as the suction
cup lifts away.

10 Operation
Note
The last saved settings are retained in the event of a power failure.
10.1 Manual override
Fig. 15 Operating the manual override
The manual override can be used to switch the solenoid valve manually when it is
not being actuated or not supplied with power. The manual override is non-locking
(automatic reset).
 Press down the plunger of the manual override with a blunt pin.
The solenoid valve is brought into the switching status.
 Remove the pin.
The plunger of the manual override and the solenoid valve move to their initial
position.
10.2 Vacuum suction nozzle status display
LED Status Significance
Out Off Switching point not reached
Lights up Switching point is reached
Flashes Teach procedure is started
Vacuum On/Off CE/CN Off Solenoid valve for vacuum ON/OFF is not
switched, no vacuum generated
Lights up Solenoid valve for vacuum ON/OFF is
switched, vacuum is generated
OE/ON Off Solenoid valve for vacuum ON/OFF is not
switched, vacuum is generated
Lights up Solenoid valve for vacuum ON/OFF is
switched, no vacuum is generated
Eject Off Solenoid valve for ejector pulse is not
switched, no ejector pulse generated
Lights up Solenoid valve for ejector pulse is switched, an
ejector pulse is generated
Fig. 16 Vacuum suction nozzle status display
11 Service
 Switch off the following energy sources before cleaning the exterior of the
device:
– operating voltage
– compressed air.
 If necessary, clean the outside of the vacuum suction nozzle.
Permissible cleaning agents are soap suds (max. +60 °C) and all non-abrasive
agents.
 Check whether the air filter is contaminated.
The filter can be inspected visually through the transparent filter cover.
Cleaning the air filter:
1
2
Fig. 17 Removing/installing the filter
1. Vent the vacuum suction nozzle.
2. Carefully pull out the slide 1of the filter 2up to the first detent. The slide 1
must stay in this position on the filter.
3. Pull the filter out.
(Use a screwdriver to help to bring out the filter, if necessary)
4. Clean the filter 2with cleaner’s solvent, for example.
5. Push the filter 2into its housing using the slide 1.
6. Push in the slide 1.
12 Fault clearance
Malfunction Possible cause Remedy
Workpiece does not re
lease from the suction
cup
A vacuum has built up when lift
ing large suction cups quickly
Increase the intensity of the eject
or pulse
Lift the suction cup more slowly
from the workpiece
Actively set the ejector pulse
when lifting the suction cup
Workpiece does not re
lease from the suction
cup
Tubing used between the suc
tion cup and vacuum suction
nozzle is wrongly sized (tube is
too long and/or tube internal
diameter is too small)
Replace hose, for hose require
ments èChapter 8.2
Flow control screw is closed Open the flow control screw
No LED display for switch
ing inputs
Supply voltage not applied or no
permitted operating voltage
Switch on supply voltage / main
tain permitted operating voltage
range
Connections swapped (incorrect
polarity)
Wire the device in accordance
with the connection arrange
ment
No control signal Check the control system
Device defective Replace the device
No LED display for switch
ing output
Pressure failure Eliminate pressure failure
Vacuum suction nozzle operated
with impermissible medium
Replace the vacuum suction
nozzle and operate only with
compressed air
LED display or switching
output does not react in
accordance with the set
tings made
Short circuit or overload at the
output
Eliminate short circuit/overload
Incorrect switching point (e.g. at
0 bar)
Repeat teach procedure
(èChapter 9.2)
Device defective Replace the device
Fig. 18 Fault clearance
13 Disassembly
1. Switch off the following sources of energy before dismantling:
– operating voltage
– compressed air.
2. Disconnect the electrical and pneumatic connections to the vacuum suction
nozzle.
3. Remove the vacuum suction nozzle.

14 Technical data
OVEM -05 -07/-10 -14/-20
General
Approval c UL us listed (OL)
RCM
CE mark (declaration of conformity
èwww.festo.com/sp)
In accordance with EU EMC Directive
Characteristic values
Operating pressure
OVEM-...-QS / -GN / -PL
[bar] 2 … 6
Operating pressure
OVEM-...-QO / -GO / -PO
[bar] 2 … 8
Pressure measuring range3) [bar] –1 … 0
Overload pressure at vacuum port [bar] 1P/1N: 5
Without vacuum sensor: 10
Ready-state delay [ms] 500
Dead time [ms] 12 22 35
Electronics
Nominal operating voltage [V DC] 24 ±15 %
Max. output current [mA] 100
Voltage drop [V] 1.5
Idle current1) [mA] 80
Coil characteristics 24 V DC Low-
current phase
[W] 0.3
Coil characteristics 24 V DC High-
current phase
2.55
Time until current reduction [ms] 80
Capacitive load maximum DC [nF] 100
Overload protection Yes
Inductive protective circuit Adapted to MZ, MY, ME coils
Insulation voltage [V] 50
Surge resistance [kV] 0.8
Max. current consumption [mA] -1P, -1N: 180
Without vacuum sensor: 30
Accuracy2)3) [% FS] 0.5
Hysteresis, permanently set2)3) [mbar] 20
Temperature coefficient2)3) [% FS/K] ±0.05
Threshold value setting range3) [bar] –1 … 0
Repetition accuracy of switching
value2)3)
[% FS] ±0.3
Protection against short circuit Yes
Protection against incorrect polarity For all electrical connections
Environment
Ambient temperature [°C] 0 … 50
Temperature of medium [°C] 0 … 50
Degree of contamination 3
Resistance to shocks
(in accordance with IEC/EN 60068 part 2-27)
30 g acceleration with 11 ms duration (half-sine)
Vibration resistance
(in accordance with IEC/EN 60068 part 2-6)
0.35 mm travel at 10 … 60 Hz,
5 g acceleration at 60 ... 150 Hz
Operating medium Compressed air to ISO 8573-1:2010 [7:4:4]
Note on the operating medium Lubricated operation not possible
Protection class III
Degree of protection4) IP65
Relative air humidity [%] 5 … 85
Resistance to interference in accordance with EN 61000-6-4
Emitted interference in accordance with EN 61000-6-2
Max. permitted signal line length [m] 30
1) Both solenoid valves are actuated
2) % FS = % of the final value in the measuring range (full-scale)
3) Technical feature only relevant for types with vacuum sensor
4) Degree of protection not evaluated by UL
Fig. 19 Technical data
14.1 Circuit symbols
OVEM-... Symbol
with vacuum sensor (-1P/-1N) without vacuum sensor
-QO/-GO-CN-...
-QS/-GN-CN-...
-QO/-GO-ON-...
-QS/-GN-ON-...
-QO/-GO-CE-...
-QS/-GN-CE-...
-QO/-GO-OE-…
-QS/-GN-OE-...
Fig. 20 Circuit symbols for the functions