SCHUNK MMS 22-PI1-EX User instructions

Assembly and Operating Manual
MMS 22-PI1-EX/MMSK 22-PI1-EX
Magnetic switch
Translation of Original Operating
Manual

Imprint
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Imprint
The sensor MEK-E22 is distrbuted exclusively by SCHUNK under the type designation MMS 22...-
EX/MMSK 22...-EX.
Manufacturer:
Bernstein AG
Hans-Bernstein-Str. 1
32457 Porta Westfalica, Germany
Copyright:
This manual is protected by copyright. The author is SCHUNK SE & Co. KG.
All rights reserved.
Technical changes:
We reserve the right to make alterations for the purpose of technical improvement.
Document number: 1566685
Version: 02.00|18/09/2023|en
Dear Customer,
Thank you for trusting our products and our family-owned company, the leading technology
supplier of robots and production machines.
Our team is always available to answer any questions on this product and other solutions. Ask
us questions and challenge us. We will find a solution!
Best regards,
Your SCHUNK team
Customer Management
Tel. [phone]
Fax [phone]
[e-mail]
Please read the operating manual in full and keep it close to the product.

General
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1 General
1.1 About this manual
This manual contains important information for a safe and
appropriate use of the product.
This manual is an integral part of the product and must be kept
accessible for the personnel at all times.
Before starting work, the personnel must have read and
understood this operating manual. Prerequisite for safe working
is the observance of all safety instructions in this manual.
1.1.1 Presentation of Warning Labels
To make risks clear, the following signal words and symbols are
used for safety notes.
CAUTION
Material damage!
Information about avoiding material damage.
1.1.2 Applicable documents
lGeneral terms of business *
lCatalog data sheet of the purchased product *
lAssembly‐ and Operating Manual of the SCHUNK-module, on
which the sensor is mounted *
The documents labeled with an asterisk (*) can be downloaded
from schunk.com.
1.1.3 Variants
This operating manual applies to the following variations:
lMMS 22-PI1 ... EX
lMMSK 22-PI1 ... EX, cable version with open wire strands

General
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1.2 Warranty
If the product is used as intended, the warranty is valid for 24
months from the ex-works delivery date under the following
conditions:
lObserve the applicable documents, }1.1.2 [/3]
lObserve the ambient conditions and operating
conditions, }2.3 [/5]
1.3 Scope of delivery
The scope of delivery includes
lMagnetic switch MMS 22-PI1-EX/MMSK 22-PI1-EX in the version
ordered
lAssembly and Operating Manual
lAccessory pack (incl. magnetic teaching tool, ID 301030)
1.4 ATEX certification
II 2 G Ex mb IIC T6 Gb
II 2 D Ex tb IIIC T85°C Db
KEMA 08ATEX0130 X

Basic safety notes
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2 Basic safety notes
2.1 Intended use
The product (sensor) is used for sensing a position of a SCHUNK
module via a magnetic control cam or a specific magnetic field.
lThe product is intended for installation in a machine/
automated system. The applicable guidelines for the machine/
automated system must be observed and complied with.
lThe product may only be used within the scope of its technical
data, }3 [/7].
2.2 Inappropriate use
The product is not a safety component in accordance with the EC
Machine Directive 2006/42/EC and must not be used in safety-
relevant parts of machine control units.
2.3 Environmental and operating conditions
Required ambient conditions and operating conditions
Incorrect ambient and operating conditions can make the
product unsafe, leading to the risk of serious injuries,
considerable material damage and/or a significant reduction to
the product's life span.
lMake sure that the product is used only in the context of its
defined application parameters, }3 [/7].
lMake sure that the environment is free from splash water and
vapors as well as from abrasion or processing dust. Exceptions
are products that are designed especially for contaminated
environments.
2.4 Constructional changes
Implementation of structural changes
Modifications, changes or reworking, e.g.additional threads,
holes, or safety devices, can damage the product or impair its
functionality or safety.
lStructural changes should only be made with the written
approval of SCHUNK.

Basic safety notes
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2.5 Personnel qualification
Inadequate qualifications of the personnel
If the personnel working with the product is not sufficiently
qualified, the result may be serious injuries and significant
property damage.
lAll work may only be performed by qualified personnel.
lBefore working with the product, the personnel must have
read and understood the complete assembly and operating
manual.
lObserve the national safety regulations and rules and general
safety instructions.

Technical data
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3 Technical data
Designation MMS 22-PI1-EX/
MMSK 22-PI1-EX
Ambient temperature [°C] (fixed-installed cable)
Min.
Max.
-20
+80
Nominal voltage [VDC]
Min.
Max.
24
10
30
IP rating (sensor is connected) 67
For further technical data, see the catalog data sheet.

Assembly and settings
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4 Assembly and settings
NOTE
The assembly instructions in this chapter are generally
applicable.
Module-specific assembly instructions for the sensor can be
found in the Assembly and Operating Manual for the module,
which can be downloaded at schunk.com
4.1 Special conditions for ATEX applications
The sensor should be installed so that it is protected from UV
light, mechanical hazards, condensation and ingress of moisture.
The sensor must be provided with a fuse that corresponds to the
rated current. The breaking capacity of the fuse must correspond
to the possible short circuit current of the supply source.
For MMS(K) 22-PI1...EX, the fixed connection cable should be
connected in non-explosive areas or in a certified housing in
compliance with an ignition protection type according to EN
60079-0 or in a certified housing according to EN 60079-31.
4.2 Mechanical connection
CAUTION
Property damage due to incorrect bending radius!
The product may get damaged if the cable's bending radius is
less than the minimum.
lStatic: 10 times the cable diameter.
lDynamic: 15 times the cable diameter.
CAUTION
Risk of damage to the sensor during assembly!
lObserve the maximal tightening torque.
Ferromagnetic components change the sensor's switching
positions, e.g. adapter plate made of construction steel. For
ferromagnetic adapter plates:
lFirst, install the module on the adapter plate.
lThen adjust the switching position of the sensor.

Assembly and settings
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NOTE
lDo not use the sensor as a safety component.
lDo not pull on the cable of the sensor.
lSecure the cable and connection plug so that they are not
taught and cannot move during operation.
lDo not exceed the permitted bending radius of the cable.
lDo not allow the sensor to come into contact with hard
objects and chemicals (e.g., nitric acid, chromic acid and
sulfuric acid).
The sensor is an electronic component that can be sensitive to
high-frequency interference or electromagnetic fields.
lCheck whether there is sufficient distance between the sensor
and sources of interference and their supply cables.
4.3 Electrical connection
Type of switching : PNP
Switching function: closer
Variant MMS 22-PI1 ... EX: ConnectorM8
VariantMMSK 22-PI1 ... EX: 2 m cable,
open wire strand
1 Brown Supply voltage 4 Black Output
3 Blue GND

Assembly and settings
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4.4 Installing and configuring the sensor
There are two possible ways of installing and configuring the
sensor. Without teach mode, the sensor is installed as described
in chapter }4.4.1 [/10]. In the case of greater precision and
hysteresis requirements, the sensor must be installed as
described in chapter }4.4 [/10] and configured in teach
mode.
4.4.1 Installing the sensor
NOTE
The sensor is adjusted against the direction of motion of the
magnet/control cam to be measured.
1. Place the monitored module in switching position.
2. Connect the sensor (1).
3. Push the sensor (1) into the groove (2) until it stops at the
housing.
OR: Turn and push the sensor (1) into the groove (2) until it
stops at the housing.
4. Pull the sensor (1) back again slowly until it operates (LED
lights up).
5. Tighten the set-screw (3) to clamp the sensor (1) in this
position in the groove (2).
ðObserve the maximum tightening torque of 10Ncm.
6. Test the switching position.

Assembly and settings
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4.4.2 Installing and configuring the sensor in teach mode
NOTE
The difference between the teach and operating temperatures
must not exceed 30 K.
1. Place the sensor (1) in the groove (2) and in the specified
position (see the Assembly and Operating Manual of the
monitored module).
2. Tighten the set-screw (3) to clamp the sensor (1) in this
position in the groove (2).
ðObserve the maximum tightening torque of 10Ncm.
3. Place the monitored module in switching position.
4. Place the magnet teach tool (MT) on the sensor (3) for at least
2s.
Or: Press the button (1) on the connector teach tool (ST) for at
least 2s.
ðThe LED (2) flashes after 2s.
5. Remove the MT.
Or: Release the button (1) on the ST.
6. Place the MT back on the sensor (3) for at least 0.3s, then
remove it.
Or: Press the button (1) on the ST for at least 0.3s and then
release it.
7. Wait 2s.
ðThe LED (2) lights up continuously.
NOTE
The setting procedure is canceled after 30s if the MT is not placed
on the sensor again or the button (1) on the ST is not pressed. The
LED (2) flashes quickly for 2s if the magnetic field is too large or
too small. If there is a duplicate or unsuitable switching point,
the sensor (3) should be moved by 2mm and taught again.

Assembly and settings
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Displaying the optimal position
1. Place the monitored module in switching position.
2. Insert the sensor (1) into the groove in teach mode until the
LED flashes quickly.
Setting the hysteresis
The switch-off point of the end position can be manually
adjusted by adjusting the hysteresis.
A minimum and maximum hysteresis is defined based on the
magnetic field. This defines the distance between the switch-on
and switch-off point. The sensor prevents a hysteresis that is too
low when the hysteresis is adjusted. If the switch-off point is
taught too far away from the switch-on point, the switch-off
position close to the switch-on point is automatically used. The
switch-off point must then be taught closer to the switch-on
point.
1. Place the module in "Switch-off point" position.
2. Place the MT on the sensor (3) for at least 5s.
Or: Press the button (1) on the ST for at least 5s.
ðThe LED (2) flashes after 2 to 5s and goes out.
3. Remove the MT quickly.
Or: Release the button (1) on the ST.
ðThe LED (2) lights up to show the current switching point,
otherwise the LED (2) flashes.
4. Place the MT back on the sensor (3) for at least 0.3s, then
remove it quickly.
Or: Press the button (1) on the CT for at least 0.3s.
5. Wait 2s.
ðAfter approximately 2s, the LED (2) flashes twice if the
magnetic field is not too large, otherwise it flashes
quickly for 2s.
NOTE
A minimum and maximum hysteresis is defined based on the
magnetic field. This defines the distance between the switch-on
and switch-off point. If the switch-off point is taught too far
away from the switch-on point, the switch-off position close to
the switch-on point is automatically used. In this case, the
switch-off point closer to the switch-on point must be taught.

Troubleshooting
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5 Troubleshooting
5.1 Sensor not operating
1. Check whether the sensor cable is broken.
2. Check whether the voltage at the sensor is within the
permitted range, }3 [/7].
3. Check whether the LED lights up at the position to be sensed
and that the sensor is operating.
NOTE
If the LED does not light up or the sensor is not operating,
contact SCHUNK Service.
5.2 Sensor is operating, but not as desired
Possible cause Sources of interference Corrective action
The sensor is interfered with or
influenced by external
magnetic or soft magnetic
materials (Fe).
Motors (coils) Increase the distance
between the sensor and
sources of interference
(until the sensor operates
correctly).
Relays
Linear motors
Electrical welding
Magnetized workpieces
(workpieces made of iron (Fe)
or similar materials)
Use finger attachments
made of aluminum.
Magnetized components and
tools made of iron (adapter
plates made, screws or
hexagon socket keys, etc.)
Use components containing
aluminum. V4A screws are
recommended.
The sensor is influenced by a
different sensor.
Same or similar product Increase the distance
between the sensors to at
least 2mm.
The sensor is affected by
deposits of magnetic chips in
the vicinity (in the air gap).
Liquids with magnetic chips or
the like.
Regularly clean the
immediate environment of
the sensor. (The higher the
exposure to such fluids, the
more often it needs to be
cleaned.)
The sensor is affected by the
directly adjacent module.
Built-in magnets in the piston
of the adjacent module
Increase the distance to the
adjacent module to at least
10mm.
NOTE
If these steps do not eliminate the problem, contact SCHUNK
Service for troubleshooting.

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