SCHURTER GmbH
D – 79346 Endingen
www.schurter.com
Product manual
PSE EX Switch
CONTENTS
Contents ............................................................................................................................. 1
1
1.1
1.2
PRODUCT DESCRIPTION ......................................................................................... 2
Functional Description: NO Switch .........................................................................................2
Annotation to the Protection type............................................................................................3
2
2.1
2.2
2.3
2.4
2.5
TECHNICAL DATA AND DIMENSIONAL DRAWINGS ............................................. 4
Technical Data .......................................................................................................................4
Component dimensions ..........................................................................................................6
Design Possibilities for Actuating Area ...................................................................................7
Hole Dimensions ....................................................................................................................8
Component Parts ...................................................................................................................8
3
3.1
3.2
Ordernumbers ........................................................................................................... 9
M16 Series .............................................................................................................................9
Lettering ...............................................................................................................................10
4
5
5.1
5.2
5.3
PACKAGING ............................................................................................................ 13
QUALIFICATION TESTS ......................................................................................... 14
IP Protection Class ...............................................................................................................14
IK Protection Class ...............................................................................................................14
Salt-Spray Test ....................................................................................................................14
6
7
8
APPROVALS ............................................................................................................ 15
ATEX Approval ........................................................................................................ 15
ROHS COMPLIANCE ............................................................................................... 15
Changes that contribute to technical improvement are subject to alternations.
Page
1 of 15
Date of issue
29.06.09
Author:
FM
Date of change:
31.03.10
Changed by:
SHO
Change No.
10178
Datasheet No.
105.9535.200
Index
a
Print date: 01/04/2010 16:59:00
SCHURTER GmbH
D – 79346 Endingen
www.schurter.com
1
PRODUCT DESCRIPTION
1.1 Functional Description: NO Switch
The piezo switch is based on the functional principle of the piezoelectric crystal. The action of
force on the piezo disk causes a voltage to be induced due to a charge transfer. The voltage
generated is converted by the electronic connection into a polarity-neutral, electronic switch
contact.
During the voltage drop, the electronic switch contact is closed for the specified pulse duration.
After this, the electronic switch contact opens again, even if the force is still present. The period
that the electronic switch contact remains closed depends on the actuating speed and force as
well as on the duration of actuation.
Diagram of an NO switch:
3
1
Hybrid
+
PIEZO
2
4
AC/DC
The piezo disk is connected to the terminals 1 and 2. The electric circuit to be switched is
connected at the terminals 3 and 4. This can be either direct voltage (DC) or alternating voltage
(AC). If a pulse is applied to the piezo disk, terminal 1 becomes positive in relation to terminal 2
due to the voltage generated. The integrated switching element controls the electric circuit to be
switched.
In the neutral position of the piezo switching element, the terminals 3 and 4 are non-conductive,
and initial contact resistance is greater than 10 MOhm. When the piezo disk is actuated, the
initial contact resistance is reduced to less than 20 Ohm.
When actuating the piezo disk, the resistance between terminals 3 and 4 is therefore changed
from high resistance
low resistance
high resistance.
This corresponds in principle to the function of a conventional NO pushbutton switch.
Changes that contribute to technical improvement are subject to alternations.
Page
2 of 15
Date of issue
29.06.09
Author:
FM
Date of change:
31.03.10
Changed by:
SHO
Change No.
10178
Datasheet No.
105.9535.200
Index
a
Print date: 01/04/2010 16:59:00
SCHURTER GmbH
D – 79346 Endingen
www.schurter.com
1.2 Annotation to the Protection type
The explosion protected Piezoswitchelement (further on PSE EX) has the function of a
contacts (normally open / NO).
For the electrical characteristics please refer to the tabel under point 2 “Technical data”.
The permissible voltage and current of explosion protected PSE are limited, so that the PSE EX
is according with EN60079-11 and has an intrinsic saftey.
The explosion protected PSE EX is according to EN 60079-0 in the device group II in category 2.
The PSE EX is only allowed in areas where the creation of explosive mixture atmospheres by
gases, vapours, mists or dust with air is caused occasionally not permanent (Cat. II).
Attention:
The maximum operating temperature is -20°C to +60°C.
The approval will cease when the type label is removed
The switch had to be installed and used according to
IEC/EN 60079-14 and IEC/EN 60079-25
Changes that contribute to technical improvement are subject to alternations.
Page
3 of 15
Date of issue
29.06.09
Author:
FM
Date of change:
31.03.10
Changed by:
SHO
Change No.
10178
Datasheet No.
105.9535.200
Index
a
Print date: 01/04/2010 16:59:00
SCHURTER GmbH
D – 79346 Endingen
www.schurter.com
2
TECHNICAL DATA AND DIMENSIONAL DRAWINGS
2.1 Technical Data
Electrical Data
Switching Voltage max.
Switching Current max.
Rated Breaking Capacity
U
I
I
I
P
I
(VAC/DC)
(mA)
(W)
(Mio.)
(MΩ)
(Ω)
(nF)
(non-applicable)
24/24
40
0.96
20
>10
<20
5
-
20-1000
polarity-free
NO switch
Lifetime
(at Rated Breaking Capacity)
Insulation Resistance
(OFF=not actuated)
Initial Contact Resistance
(ON=actuated)
Capacity
Inductivity
NO Pulse Time
(depending on the actuating force, time and speed)
C
I
L
I
(H)
(ms)
Contact Configuration
Switch Function
Mechanical Data
Actuating Force (at ambient temperature)
Actuating Travel
Torque
IK Protection Class
(N)
(mm)
(Nm)
(IK)
≤3
1)
0.002
2.5
02
Climatic Data
Operating Temperature
Storage Temperature
IP Degree of Protection Front Side submerged
IP Degree of Protection Front Side hose water
1)
(°C)
(°C)
(IP)
-20 to +60
-20 to +60
67
69K
At temperatures lower than -10°C, the actuating force increases 2- to 4-fold.
Changes that contribute to technical improvement are subject to alternations.
Page
4 of 15
Date of issue
29.06.09
Author:
FM
Date of change:
31.03.10
Changed by:
SHO
Change No.
10178
Datasheet No.
105.9535.200
Index
a
Print date: 01/04/2010 16:59:00
SCHURTER GmbH
D – 79346 Endingen
www.schurter.com
Material Individual Parts
Material
Stainless Steel
²)
Housing
(depending on type)
Anodized aluminum
Polyamide
Messing chrome-plated
²)
When using the switch in a saline or chloric environment, special materials
must be used. Items available upon request.
Changes that contribute to technical improvement are subject to alternations.
Page
5 of 15
Date of issue
29.06.09
Author:
FM
Date of change:
31.03.10
Changed by:
SHO
Change No.
10178
Datasheet No.
105.9535.200
Index
a
Print date: 01/04/2010 16:59:00
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