Festo OVEM-05 User manual

Vacuum suction nozzle
OVEM-...-1P/1N
Festo AG & Co. KG
Postfach
Germany
73726 Esslingen
[phone]
www.festo.com
Operating instructions 8038307
1407a
[8038309]
Original: de
Vacuum suction nozzle OVEM-...-1P/1N English...........................
1 Product description
1.1 Overview
aJ
9
8
aD
2 3
aA
1
aB
aC
aE
7
4 5 6
1Solenoid valve, ejector pulse (E)
2Solenoid valve, vacuum
ON/OFF (V)
3Supply port
4Exhaust port / silencer
5Vacuum port
6Replaceable filter element
7Housing with mounting holes
8Slide for changing the filter
9Filter housing with inspection
window
aJ Flow control screw for adjusting
the intensity of 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 Plug for electrical connection
(M12)
1) LED and EDIT button not present on models without vacuum sensor
Fig. 1 Control sections and connections
1.2 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
Features Code Specification
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. 2 Overview of variants
2 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)
 Additional factory settings èChapter 12.1
1. Mount the vacuum suction nozzle (èChapter 5.1).
2. Connect the vacuum suction nozzle pneumatically (èChapter 5.2).
3. Connect the vacuum suction nozzle electrically (èChapter 5.3).
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 6.2).
The factory settings are not reproducible.
3 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.

3.1 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. 3 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. 4 Variants, switching output and switching inputs
3.2 Switching point and hysteresis
Threshold value comparator
NO (normally open)
Fig. 5 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.
4 Requirements for product use
Note
Improper handling can result in malfunctions.
 Make sure that the specifications shown below are always observed.
 Compare the maximum values specified in these operating instructions with
your actual application (e.g. operating media, pressures, forces, torques, tem
peratures, masses, speeds, operating voltages, flow rates).
 Take into consideration the ambient conditions at the location of use.
 Comply with the regulations of the workers’ compensation trade association,
the German Technical Control Board (TÜV), of the VDE or relevant national regu
lations.
 Remove all transport packing, such as protective wax, foils (polyamide), caps
(polyethylene), cardboard boxes (except for the sealing elements of the pneu
matic connections).
The material used in the packaging has been specifically chosen for its recy
clability (exception: oil paper = residual waste).
 Use the product in its original state. Unauthorised modification is not permitted.
Range of applications and certifications
The information in this section, in combination with the UL marking on the product,
must be observed in order for there to be compliance with the certification condi
tions of Underwriters Laboratories Inc. (UL) for USA and Canada. Observe the fol
lowing English-language notes from UL:
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. 6 UL approval information
Only for connection to an NEC/CEC Class 2 supply.
Raccorder Uniquement a un circuit de NEC/CEC Classe 2.
This device is intended to be used with a Class 2 power source or Class 2 trans
former in accordance with UL1310 or UL1585.
As an alternative, an LV/C (Limited Voltage/Current) power source with one of the
following properties can be used:
– This device shall be used with a suitable isolating source such that the maxim
um open circuit voltage potential available to the product is not more than
24 V DC and the current is limited to a value not exceeding 8 amperes meas
ured after 1 minute of operation.
– This device shall be used with a suitable isolating source in conjunction with a
fuse in accordance with UL248. The fuse shall be rated max. 4 A and be in
stalled in the 24 V DC power supply to the device in order to limit the available
current.
Note that, when more than one power supply or isolating device is used, connec
tion in parallel is not permitted.
Note
The noise level must be measured in the end product and taken into account.
5 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
An unfavourable mounting position can result in increased sound pressure.
 During installation, make sure that the exhaust can flow without hindrance.
5.1 Mechanical
Direct mounting
Fig. 7 Direct mounting

 Mount the vacuum suction nozzle at the intended position with two screws (size
of the mounting screws èFig. 8), 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. 8 Size of mounting screws
Mounting with accessories
The required accessories are listed in èAccessories.
H-rail mounting
1
Fig. 9 H-rail mounting
4. 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.
5. Hook the vacuum suction nozzle onto the H-rail and press in the direction of the
arrow.
6. Secure the vacuum suction nozzle to the H-rail with screw 1, fastening it with
max. torque 1 Nm.
Mounting bracket
Fig. 10 Mounting bracket
 Mount the vacuum suction nozzle at the intended position with two screws
(size of the mounting screws èFig. 8), 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-….
5.2 Pneumatic
 Connect the QS push-in connectors (-QS, -QO, -PL, -PO) with a corresponding hose.
Usage of the type PUN hose is recommended.
 When selecting the tubing for tubing connection on a vacuum suction nozzle
with threaded ports (-GN, -GO), be mindful of the minimum internal diameter for
tubing stated in Fig. 11.
Type OVEM-05
GN/GO
OVEM-07
GN/GO
OVEM-10
GN/GO
OVEM-14/-20
GN/GO
Tube length < 0.5 m < 2 m < 0.5 m < 2 m < 0.5 m < 2 m < 0.5 m < 2 m
Minimum tube internal diameter [mm]
Port 1
Compressed air
1 2 1.5 2 2 3 3 4
Port 2
Vacuum
2 3 3 4 4 5 5.5 6
Port 3
Exhaust air
2 3 3 4 4 5 5.5 6
Fig. 11 Minimum tube internal diameters
 If required, you can extend the pneumatic silencer for OVEM-07/-10/-14/-20
with a pneumatic silencer extension (èChapter 11 Accessories).
5.3 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. 12.
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. 12 Pin allocation
Circuit diagrams
OVEM-...-1P
OVEM-...-1N
OVEM without vacuum sensor
Fig. 13 Circuit diagrams for vacuum suction nozzle

6 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.
6.1 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.
6.2 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 12.1).
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.
6.3 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.
6.4 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.
7 Operation
Note
The last saved settings are retained in the event of a power failure.
7.1 Manual override
Fig. 14 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.
7.2 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. 15 Vacuum suction nozzle status display
8 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. 16 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.
9 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 5.2
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 6.2)
Device defective Replace the device
Fig. 17 Fault clearance
10 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.
11 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. 18 Accessories
12 Technical data
OVEM -05 -07/-10 -14/-20
Operating pressure [bar] 2 … 8
QS/GN/PL-…-1P/1N: 2 … 6
Operating medium Compressed air to ISO 8573-1:2010 [7:4:4]
Note on the operating medium Lubricated operation not possible
Ambient temperature [°C] 0 … 50
Temperature of medium [°C] 0 … 50
Degree of contamination 3
Relative air humidity [%] 5 … 85
Nominal operating voltage [V DC] 24 ±15 %
Max. current consumption [mA] -1P, -1N: 180
Without vacuum sensor: 30
Idle current1) [mA] 80
Coil characteristics 24 V DC [W] Low-current phase: 0.3
High-current phase: 2.55
Time until current reduction [ms] 80
Ready-state delay [ms] 500
Switching output
– Max. output current [mA] 100
– Voltage drop [V] 1.5
– Capacitive load maximum DC [nF] 100
Dead time [ms] 12 22 35
Protective functions
– inductive protective circuit Adapted to MZ, MY, ME coils
– Protection against short circuit Yes
– Overload protection Yes
Protection against incorrect polarity For all electrical connections
Insulation voltage [V] 50
Surge resistance [kV] 0.8
Degree of protection IP65
Protection class 3
Resistance to interference See declaration of conformity (www.festo.com)2)
Emitted interference See declaration of conformity (www.festo.com)2)
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
Resistance to shocks in accordance with IEC/EN 60068 part 2-27:
30 g acceleration with 11 ms duration (half-sine)
Max. permitted signal line length [m] 30
Overload pressure at vacuum port [bar] 1P/1N: 5
Without vacuum sensor: 10
Pressure measuring range4) [bar] –1 … 0
Repetition accuracy of switching
value3)4)
[% FS] Max. ±0.3
Temperature coefficient3)4) [% FS/K] ±0.05
Threshold value setting range4) [bar] –1 … 0
Hysteresis, permanently set3)4) [mbar] 20
1) Both solenoid valves are actuated
2) The product is intended for use in industrial environments. Measures for interference suppression may
need to be implemented in residential areas.
3) % FS = % of the final value in the measuring range (full-scale)
4) Technical feature only relevant for types with vacuum sensor
Fig. 19 Technical data
12.1 Factory setting
OVEM-...
Out Switching point (SP) –0.4 bar
(Fixed hysteresis (HYS) 20 mbar
Fig. 20 Factory setting

12.2 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. 21 Circuit symbols for the functions