ASM posirot PRAS Series User manual

POSIROT®/ PRAS......
Analog Magnetic
Angle Sensors
Instruction Manual
Explosion-proof Sensors
Please read carefully before installation and operation!
Save these instructions for future reference.

2 MAN-PRAS-EX-E-16 ASM GmbH
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POSIROT®EX
Contents
Contents Safety instructions 3
Intended use 4
Non intended use 4
Description 5
Marking 5
Mounting 5
Placement and alignment of the position magnet 5
Reference position 6
Electrical connection 7
Potential equalization 8
Connecting the sensor 8
Mechanical information 11
Torque for the mounting screws 11
Removal 11
Maintenance and service 12
Maintenance interval 12
Outline drawings 13
Specification of the outputs 23
Accessories 25
Position magnets 25
Mounting plates 28
Declaration of conformity 30

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POSIROT®EX
Instruction Manual
Do not use POSIROT®position sensors in safety critical applica-
tions where malfunction or total failure of the sensor may cause
danger for man or machine.
For safety related applications additional mechanisms (devices)
are necessary to maintain safety and to avoid damage.
Disregard of this advice releases the manufacturer from pro-
duct liability.
The sensor must be operated only within values specied in the
catalog or datasheet.
Connection to power supply must be performed in accordance
with safety instructions for electrical facilities and performed
only by qualied personnel.
The qualied personnel must have knowledge about the type of
ex-protection, regulation and ordinance of operating equipment
in ex-proof areas.
Check that the protection class of the sensor is suitable for the
operation conditions.
Do not connect or disconnect the sensor under tension!
Disregard of this advice can lead to malfunctions, damage to
property or personal injury and releases the manufacturer from
product liability.
Safety
instructions

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POSIROT®
Instruction Manual
Notes
Intended use The angle sensor was intended for angle position measurement via rotati-
on of the position magnet or rotation of the shaft, when used in the properly
rated ambient explosive atmospheric and technical conditions for which the
sensor is designated.
Unintended use The unintended use is when the application has an explosive gas atmo-
sphere or higher explosive dust atmosphere that requires a higher rated
device.

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POSIROT®EX
Instruction Manual
Description The angle sensors PRAS of the POSIROT®product family perform touch-
less or shaft based angle measurement. A position magnet rotates in front
of the sensing area of the sensor head. The angular position is converted
into a standardized high resolution voltage or current output. Measuring
ranges 15° to 360° having rising or falling characteristic are available.
PRAS2EX-M12A II 3D Ex tc IIIC T80°C Dc X
PRAS2EX-M12R II 3D Ex tc IIIC T80°C Dc X
PRAS3EX-M12A II 3D Ex tc IIIC T80°C Dc X
PRAS3EX-M12R II 3D Ex tc IIIC T80°C Dc X
PRAS5EX-K-M12A II 3D Ex tc IIIC T80°C Dc X
PRAS5EX-K-M12R II 3D Ex tc IIIC T80°C Dc X
PRAS5EX-V-M12A II 3D Ex tc IIIC T80°C Dc X
PRAS5EX-V-M12R II 3D Ex tc IIIC T80°C Dc X
II = Equipment group II
3 = Hazard Category 3
D = applicable in Zone 22; D = dust
tc = Protection by enclosure: dust, zone 22
IIIC = conductive dust
T80°C = The maximum allowed housing temperature is 80 °C
X = Tested with low impact energy 4 J
Ambient temperature: -20 °C to +40 °C
Marking
Sensors

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Mounting
POSIROT®EX
Instruction Manual
Mounting
Measuring error by misalignment of the position magnet
Placement and alignment of the position magnet
For non-contact sensor models air gap and alignment of sensor and position
magnet has to be observed. The linearity will degrade in case of misalign-
ment. Also external magnetic elds and magnetized materials nearby can
effect the measuring result.
Sensor Position
magnet
Air gap
[mm]
Paral-
lelism
[°]
Error by axial misalignment
[°]
0,2
mm
0,5
mm
1 mm 2 mm 3 mm 4 mm
PRMAG2-VA 0 ... 5 5 0.1 0.3 0.8 1.8 6.5 -
PRAS2EX PRMAG2Z-VA 0 ... 9 5 0.1 0.2 0.6 1.5 4.5 8.5
PRMAG5Z-VA 0 ... 8 5 0.1 0.2 0.6 1.5 4.5 8.5
PRMAG2-VA 0 ... 4.5 5 0.1 0.3 0.8 1.8 6.5 -
PRAS5EX PRMAG2Z-VA 0 ... 5.5 5 0.1 0.2 0.6 1.5 4.5 8.5
PRMAG5Z-VA 0 ... 7.5 5 0.1 0.2 0.6 1.5 4.5 8.5

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Mounting Reference position
For ease of mounting there are reference markings at housing, position
magnet and near the shaft. If both markings match output will be on the
50% of full scale.
Clockwise increasing signal (CW), view to measuring area/shaft
Counterclockwise increasing signal (CCW), view to measuring area/shaft
Example for angle range 90°
Example for angle range 360°
POSIROT®EX
Instruction Manual
Range [°]
Marking
Range [°]
Marking
Marking
Marking

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POSIROT®EX
Instruction Manual
Mounting Output Value range 50% value of output signal
U2 0.5 ... 10 V 5.25 V
U6 0.5 ... 4.5 V 2.5 V
I1 4 ... 20 mA 12 mA
Elektrical connection
Mounting / removal of the sensor under non-explosible conditions only.
Excitation voltage, excitation current
Wiring of the connector or the connecting cable, excitation voltage and
excitation current see chapter “Specication of the outputs“ at the end of
this manual.
Connect the cable screen - if present - to the local potential equilizer.
Caution:
• Assembled accessory cables may have different wire colors!
Take notice of the accessory pages of the catalog.
• Sensors with connector output have the given IP protection class
only with the correct plugged mating connector!
• Follow the signal wiring table!

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POSIROT®EX
Instruction Manual
Potential equalization
• The local potential equalization has to be realized with a wire cross
section of 4 mm² minimum.
PRAS2EX PRAS3EX PRAS5EX-K PRAS5EX-V
Connecting the sensor
• Connecting and disconnecting of the M12 connector / socket only if
excitation voltage is OFF.
Mounting

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Torque Mounting method Material Torque
[Nm]
M2,5 screws for mounting brackets (PRAS2,
PRAS3) – 0.8
M3 screws for mounting ange (PRAS3) – 1.2
M8 screws (PRAS5) – <20
POSIROT®EX
Instruction Manual
• Only approved M12 connector / socket can be used, which can
removed only with special tools, e.g. z.B. EVC 04A or EVC 05A of
ifm/Essen
• Cables must be xed rmly and protected against damage.
• Protect cables against UV radiation.
• Do not turn the M12 connector insert.
• A separate cord grip is recommended.
• Installation according to DIN EN 60079-14.
Mechanical information
• Do not mount the sensor in dust condition.
• Avoid dust deposit.
• Do not expose the sensor to shocks, the housings have been
tested with low impact energy (DIN EN 61241-0).
PRAS2EX-M12A Impact energy 4J
PRAS2EX-M12R Impact energy 4J
PRAS3EX-M12A Impact energy 4J
PRAS3EX-M12R Impact energy 4J
PRAS5EX-K-M12A Impact energy 4J
PRAS5EX-K-M12R Impact energy 4J
PRAS5EX-V-M12A Impact energy 4J
PRAS5EX-V-M12R Impact energy 4J
• Do not expose the sensor to shocks or any kind of impacts.
• Tightening torque – see following table.
Torque of the xing screws
Mounting

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POSIROT®EX
Instruction Manual
General
information
Mechanical
information for
PRAS2EX and
PRAS5EX-K
• Secure mounting screws against loosening, use threadlocker if
necessary.
• Mount sensor with corrosion-resistant screws.
• Mount sensor on a at and smooth metallic surface .
• Provide protection devices to avoid damage or blocking of sensor
and magnet by strange parts falling into the working area.
• Dust concentrations between sensor and magnet are not allowed –
remove any dust deposit – appropriate maintenance intervals must
be scheduled.
• Remove sensor only in de-energized condition.
• Removal of the sensor under non-explosible conditions only.
Removal
• The max. number of revolutions is 1000 1/min (1000 RPM)
• Mount the sensor mechanical strainless.
• Use shaft couplings resp. torque arms (e.g. exible ones) to avoid
misalignment errors.
• Use electrically conductive shafts/torque arms..
• Sensor housing and senor shaft must be connected to the same
potential equilizer.
Mechanical
information for
PRAS3EX and
PRAS5EX-V
• Contact between sensor and magnet is not allowed.
• The max. number of revolutions is 1000 1/min (1000 RPM)

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POSIROT®EX
Instruction Manual
Maintenance and
service
Maintenance
interval
• Any modication or repair of the sensor is not allowed.
• In case of any fault or error put the sensor out of service and
contact ASM.
Within maintenance activities, those parts of the sensor which are associated
with the risk of ignition must be checked mainly (e.g. the integrity of con-
nectors, cables, seals etc.). Maintenance intervals are application specic
and must be determined by the customer depending on the operating
conditions.
The following maintenance activities are recommended:
Check for
dust deposit
Integrity of
housing,
connector, cable
Mounting
elements
Visual check of
shaft sealing
PRAS2EX XXX
PRAS3EX XXXX
PRAS5EX-K XXX
PRAS5EX-V XXXX
Activity Dust deposit:
Remove dust
Damaged parts:
Put sensor out of
service and replace
damaged parts
resp. send sensor
to ASM for repair
Loose mounting
parts: Screw tight
mounting parts
with recommended
torque, if applicable
use bolt adhesive
Damaged shaft
sealing:
Put sensor out of
service and send it
to ASM for repair
Maintenance work must not be made under combustible conditions.

33 [1.299]
36[1.417]
20[.787]
3[.118]
2,5[.098]
2,5 [.098]
36 [1.417]

42[1.654]
Markierung
Anschluß für
Potentialausgleich
Befestigung PRPT-BFS1
Positions-
magnet
Stecker M12
2,5 [.098]
2,5 [.098]
33 [1.299]
Markierung
Markierung
Markierung
Markierung
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POSIROT®EX
Instruction Manual
Outline drawing
PRAS2EX
Connector version
M12 axial
Weight without cable 110 g approx.
Dimensions informative only.
For guaranteed dimensions consult factory.
Dimensions in mm [inch]
Connector M12
Marking
Position
magnet
Reference
position Marking
Marking
Mounting clamps
PRPT-BFS1
Terminal point for
potential equalization
Magnets:
e.g. PRMAG2-VA
PRMAG2Z-VA
PRMAG5Z VA

33 [1.299]
36 [1.417]
3[.118]
2,5 [.098]
2,5 [.098]
25[.984]
42[1.654]
Stecker M12
Markierung
Anschluß für
Potentialausgleich
2,5[.098]
Befestigung PRPT-BFS1 Positions-
magnet
30 [1.181]
2,5 [.098]
Meßfläche
33 [1.299]
Markierung
Markierung
Markierung
Markierung
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POSIROT®EX
Instruction Manual
Outline drawing
PRAS2EX
Connector version
M12 radial
Weight without cable 140 g approx.
Dimensions informative only.
For guaranteed dimensions consult factory.
Marking
Position
magnet
Connector M12
Measuring area
Dimensions in mm [inch]
Reference
position
Marking
Marking
Terminal point for
potential equalization
Mounting clamps
PRPT-BFS1
Magnets:
e.g. PRMAG2-VA
PRMAG2Z-VA
PRMAG5Z VA

33 [1.299]
10 -0,01
0+ .394 -0.0004
0+
[ ]
Ø
20[.787]
3[.118]
47[1.850]
33 [1.299]Ø
9 [.354]
2,5[.098]
2,5 [.098]
26


0,05
1.024

0.002
[]
4 x M3-5[.197] Abflachung /
flat
Befestigungsexzenter /
mounting clamps
16[.630]
Markierung /
marking
Potentialausgleich /
earthing
M12-Stecker /
M12-connector
36 [1.417]
42 [1.654]
Markierung
(Rückseite)
Abflachung
Markierung
(Rückseite)
Abflachung
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POSIROT®EX
Instruction Manual
Outline drawing
PRAS3EX
M12 axial
Solid shaft
Weight without cable 290 g approx.
Dimensions informative only.
For guaranteed dimensions consult factory.
Marking
Dimensions in mm [inch]
Connector M12
Flat area
Reference
position Marking
(back side)
Terminal point for
potential equalization
Mounting clamps
PRPT-BFS1
Flat area
4x M3-5[.197] deep
screw hole orientation to marking not defined!

33 [1.299]
10 -0,01
0+ .394 -0.0004
0+
[ ]
Ø
20[.787]
3[.118]
52[2.047]
33 [1.299]Ø
9 [.354]
2,5[.098]
2,5 [.098]
26


0,05
1.024

0.002
[]
4 x M3-5[.197] Abflachung /
flat
Befestigungsexzenter /
mounting clamps
6[.236]
42[1.654]
M12-Stecker/
M12-connector
36 [1.417]
Markierung /
marking
Potentialausgleich /
earthing
Markierung
(Rückseite)
Abflachung
Markierung
(Rückseite)
Abflachung
16 MAN-PRAS-EX-E-16 ASM GmbH
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Flat area
Marking
(back side)
POSIROT®EX
Instruction Manual
Reference
position
Outline drawing
PRAS3EX
M12 radial
Solid shaft
Dimensions in mm [inch]
Marking
Connector M12
Weight without cable 320 g approx.
Dimensions informative only.
For guaranteed dimensions consult factory.
Terminal point for
potential equalization
Mounting clamps PRPT-BFS1
Flat area
4x M3-5[.197] deep
screw hole orientation to marking not defined!


42 [1.654]
2,5[.098]
2,5[.098]
7[.276]
3[.118]
47[1.850]
33 [1.299]
33 [1.299]Ø
36 [1.417]
Potentialausgleich /
earthing
Befestigungselement /
mounting clamps
Markierung /
marking
Markierung /
marking
26

0,05
1.024
.002
[]
4x M3-5[.197]
6-0,012
0,012
+.236 -.0005
.0005+
[ ]
Ø
15[.591]
16[.630]
M12-Stecker /
M12-connector
Markierung
(Rückseite)
Markierung
(Rückseite)
Markierung
Markierung
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POSIROT®EX
Instruction Manual
Outline drawing
PRAS3EX
M12 axial
Hollow shaft
Reference
position
Weight without cable 290 g approx.
Dimensions informative only.
For guaranteed dimensions consult factory.
Dimensions in mm [inch]
Marking
Marking
(back side)
Marking
Connector M12
Terminal point for
potential equalization
Mounting clamps
PRPT-BFS1
Marking


42[1.654]
Markierung /
marking
Potentialausgleich /
earthing
M12-Stecker /
M12-connector
33 [1.299]
36 [1.417]
33 [1.299]Ø
2,5[.098]
2,5 [.098]
7[.276]
3[.118]
52[2.047]
26


0,051.024

.002
[]
4 x M3-5[.197]
Befestigungselement /
mounting clamps
6-0
0,012
+.236 -0
.0005+
[ ]
Ø
15[.591]
6[.236]
Markierung /
marking
Markierung
(Rückseite)
Markierung
(Rückseite)
Markierung
Markierung
18 MAN-PRAS-EX-E-16 ASM GmbH
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POSIROT®EX
Instruction Manual
Reference
position
Outline drawing
PRAS3EX
M12 radial
Hollow shaft
Marking
Marking
(back side)
Dimensions in mm [inch]
Weight without cable 320 g approx.
Dimensions informative only.
For guaranteed dimensions consult factory.
Marking
Connector M12
Terminal point for
potential equalization
Mounting clamps PRPT-BFS1
Marking

23[.906]
13[.512]
48

0,051.890

.002
[]
66

-0,1
0
+2.598-.004
0
+
[]
15 [.591]Ø
9 [.354]Ø
Markierung /
marking
Potentialausgleich /
earthing
Magnet /
magnet
Meßfläche /
measurement area
M12-Stecker /
M12-connector
14[.551]
Markierung
Markierung
(Vorderseite)
Markierung
Markierung
(Vorderseite)
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POSIROT®EX
Instruction Manual
Outline drawing
PRAS5EX-K
M12 axial
Reference
position
Marking
Marking
(front side)
Weight 380 g approx.
Dimensions informative only.
For guaranteed dimensions consult factory.
Magnets:
e.g. PRMAG2-VA
PRMAG2Z-VA
PRMAG5Z VA

66
-0,1
0
+2.598-.004
0
+
[]
48

0,051.890

.002
[]
15 [.591]Ø
13[.512]
9 [.354]Ø 13,4 [.528]
10[.394]
23[.906]
Markierung /
marking
Potentialausgleich /
earthing
Magnet /
magnet
Markierung
Markierung
(Vorderseite)
Markierung
Markierung
(Vorderseite)
20 MAN-PRAS-EX-E-16 ASM GmbH
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POSIROT®EX
Instruction Manual
Reference
position
Outline drawing
PRAS5EX-K
M12 radial
Marking
Marking
(front side)
Weight without cable 400 g approx.
Dimensions informative only.
For guaranteed dimensions consult factory.
Magnets:
e.g. PRMAG2-VA
PRMAG2Z-VA
PRMAG5Z VA