ASM Posirot PRAS2 User manual

POSIROT®/ PRAS
Analog Magnetic
Angle Sensors
Instruction Manual
Please read carefully before installation and operation!

2 MAN-PRAS-E-15 ASM GmbH
www.asm-sensor.com
POSIROT®
Contents
Contents Safety instructions 3
Intended use 4
Unintended use 4
Description 5
Mounting 5
Placement and alignment of the position magnet 5
Reference position 7
Torque for the mounting screws 8
Electrical installation 8
Sensor fixing with shield 9
Outline drawings 10
Specification of the outputs 25
Signal wiring 28
Accessories 31
Accessory cables 31
Position magnets 33
Mounting plates 38
Couplings 40
Service, calibartion, disposal 41
Reliability characteristics 42
Declaration of conformity 43

ASM GmbH MAN-PRAS-E-15 3
www.asm-sensor.com
POSIROT®
Instruction Manual
Do not use POSIROT®position sensors in safety critical appli-
cations where malfunction or total failure of the sensor may
cause danger for man or machine.
For safety related applications additional mechanisms (de-
vices) 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 trained staff.
Safety
instructions
Explanation of used
safety signs and
signal words
WARNING, Risk of Injury:
Indicates a potentially hazardous situation, which,
if not avoided, could result in serious injury or
property damage.
WARNING, Risk of Personal Injury or Death:
Indicates a situation that can result in serious personal
injury or death if not properly avoided.
DANGER
WARNING, Risk of Personal Injury or Death:
Indicates a situation that can result in moderate
personal injury or death if not properly avoided.
WARNING
WARNING, Risk of Personal Injury:
Indicates a situation that can result in minor personal
injury if not properly avoided.
CAUTION
WARNING, Risk of Property Damage:
Indicates a situation that can result in minor to major
property damage if not properly avoided.
NOTICE

4 MAN-PRAS-E-15 ASM GmbH
www.asm-sensor.com
POSIROT®
Instruction Manual
Intended use
Unintended use
Maintenance and
service
• In order to avoid risk of injury and improper handling the
customer is not allowed to repair the sensor. No warranty or
liability will be granted for opened sensors.
• Damaged sensors must be shut down immediately and sent
to the factory for repair.
Proper maintenance comprises the visual examination of parts (e.g.
integrity of housing, connectors and cables). Maintenance intervals
dependonthespecicapplicationandshouldbedenedbytheuser
in dependance of operating conditions.
The following maintenance steps are recommended:
Maintenance-
interval
The angle sensor was intended for angular position measurement,
when properly mounted and used in the properly rated ambient
atmospheric and technical conditions for which the sensor is
designated.
Theunintendeduseiswhenthesensorisusedoutsideitsspecied
technical and ambient atmospheric conditions or when improperly
mounted.
Deinstallation Disconnectelectricalconnections.Loosenxingscrews.
Disposal Disposal according to applicable government regulations.
Integrity of housing,
connector, cable
Mounting
elements
Visual check of
shaft sealing
PRAS2 X X
PRAS3 XXX
PRAS5 X X
PRAS5-V XXX
PRMAG20 X
PRMAG21 X
PRMAG22 X
PRMAG5Z X
Maßnahmen 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

ASM GmbH MAN-PRAS-E-15 5
www.asm-sensor.com
POSIROT®
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.
Placement and alignment of the position magnet
Mounting
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
misalignment.
Adjacent magnetic elds or ferromagnetic materials can inuence the
measurement results of the PRAS sensors of the POSIROT®product
family. Therefore the angle sensors should be mounted solely with
nonmagnetic / non magnetisable shields and screws.
The angle sensors PRAS2, PRAS3 and PRAS5 are equipped with
an integrated magnetic shield which minimizes the sensitivity against
externalmagneticelds.
Optional shield plates are available for the angle sensors PRAS20,
PRAS21, PRAS26 and PRAS27. They can reduce the effect of residual
magnetizing in case the sensor has to be mounted on a ferromagnetic
material (see page 9). It is however not possible to exclude the effect of
lateralexternalmagneticelds.
NOTICE

a
c
b
a
c
b
6 MAN-PRAS-E-15 ASM GmbH
www.asm-sensor.com
POSIROT®
Instruction Manual
Mounting
(continued)
Measuring error by misalignment of the position magnet
Sensor Position
magnet
Air gap
[mm]
(a)
Paral-
lelism
[°]
(b)
Error by axial misalignment
[°]
(c)
0.2
mm
0.5
mm 1 mm 2 mm 3 mm 4 mm
PRAS1 PRMAG20 0 ... 6.5 0 ... 5 0.15 0.4 0.8 2.2 5.0 –
PRMAG21 0 ... 4 0 ... 5 0.2 0.4 1.0 3.8 10 –
PRMAG22 0 ... 9.5 0 ... 5 0.1 0.4 1.0 2.2 4.5 8.0
PRAS2 PRMAG20 0 ... 6 0 ... 5 0.15 0.4 0.8 2.2 5.0 –
PRMAG21 0 ... 3.5 0 ... 5 0.2 0.4 1.0 3.8 10 –
PRMAG22 0 ... 9.0 0 ... 5 0.1 0.4 1.0 2.2 4.5 8.0
PRAS5 PRMAG5-Z 0 ... 7.5 0 ... 5 0.1 0.2 0.6 1.5 4.5 8.5
PRMAG20 0 ... 5.5 0 ... 5 0.15 0.4 0.8 2.2 5.0 –
PRMAG21 0 ... 3 0 ... 5 0.2 0.4 1.0 3.8 10 –
PRMAG22 0 ... 8.5 0 ... 5 0.1 0.4 1.0 2.2 4.5 8.0
PRAS20
PRAS26
PRMAG20 0 ... 7 0 ... 5 0.1 0.3 0.7 2.0 4.6 –
PRMAG21 0 ... 2 0 ... 5 0.15 0.3 0.9 3.6 9.6 –
PRMAG22 0 ... 10 0 ... 5 0.0 0.0 0.7 1.5 3.8 7.0
PRAS21 PRMAG20 0 ... 7.0 0 ... 5 0.1 0.3 0.7 2.0 4.6 –
PRMAG21 0 ... 2 0 ... 5 0.15 0.3 0.9 3.6 9.6 –
PRMAG22 0 ... 10 0 ... 5 0.0 0.0 0.7 1.5 3.8 7.0
PRAS27 PRMAG20 0 ... 7.5 0 ... 5 0.1 0.3 0.7 2.0 4.6 –
PRMAG21 0 ... 2.5 0 ... 5 0.15 0.3 0.9 3.6 9.6 –
PRMAG22 0 ... 10.5 0 ... 5 0.0 0.0 0.7 1.5 3.8 7.0

ASM GmbH MAN-PRAS-E-15 7
www.asm-sensor.com
Mounting
(continued)
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 sensor measuring area/shaft
Counterclockwise increasing signal (CCW), view to sensor measuring area/shaft
Example for angle range 90°
Example for angle range 360°
POSIROT®
Instruction Manual
Range [°]
Marking
Range [°]
Marking
Marking
Marking

8 MAN-PRAS-E-15 ASM GmbH
www.asm-sensor.com
POSIROT®/
Instruction Manual
Mounting
(continued)
Electrical installation
Supply voltage, current consumption, wiring
For wiring of connector or cable outlet as well as supply voltage and current
consumptionrefertochapter„Specicationoftheoutputs“attheendofthis
manual.
Cable screen has to be connected to protective earth.
Caution: Observe different color code for pre-assembled accessory cables
- refer to accessories pages.
The protection class of sensors with connector output is valid only if the
electrical plug is connected!
Caution: Do not twist the M12 connector insert.
Cable outputs must be installed in such a way that no moisture can get into
the cable.
Crossing the dew point must be avoided.
Do not strain the connection cable.
A separate cord grip is recommended.
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
U8 0.5 ... 4.5 V 2.5 V
I1 4 ... 20 mA 12 mA
Torque Mounting method Material Torque
[Nm]
Nuts M12x1 (PRAS1) – 2.5
M2,5 screws for mounting brackets (PRAS2,
PRAS3) – 0.8
M3screwsformountingange(PRAS3) – 1.2
M3 screws with washer (PRAS21) A4
Aluminium
Brass
Plastic
<0.8
–
–
–
M4 screws with washer (PRAS20) A4
Aluminium
Brass
Plastic
<1.8
–
–
–
M4 screws (PRAS27) – 1
M4 screws with washer (PRAS26) A2 <1.8
M8 screws (PRAS5) – < 10
NOTICE
Torque for xing screws
Thespeciedtorquesandmountingmethodsaregeneralrecomendations
and can differ according to application and operating conditions.

PRAS20 PRAS21
PRAS27
PRAS20
PRAS21
PRAS27
PRAS26
PRAS26
ASM GmbH MAN-PRAS-E-15 9
www.asm-sensor.com
POSIROT®
Instruction Manual
Mounting
(continued)
shield plate
PRAS20-MSHIELD
Sensor xing with a shield plate (optional)
shield plate
PRAS21-MSHIELD
shield plate
PRAS27-MSHIELD
Mechanical information PRAS3, PRAS5-V
• Prevent the sensor shaft from binding.
• Useshaftcouplingsresp.torquearms(e.g.exibleones)toavoid
misalignment errors.
(see chapter „couplings“)
Mechanical information PRAS20, PRAS21, PRAS26, PRAS27
• Mountthesensoronaatsurface.
• Do not deform the sensor housing!
NOTICE
NOTICE
shield plate
PRAS20-MSHIELD

10 MAN-PRAS-E-15 ASM GmbH
www.asm-sensor.com
POSIROT®
Instruction Manual
Outline drawing
PRAS1
Connector version
Outline drawing
PRAS1
Cable version
Weight without cable 20 g approx.
Dimensions informative only.
For guaranteed dimensions consult factory.
Dimensions in mm [inch]
Position
magnet
Marking
Dimensions in mm [inch]
Marking
Position
magnet
Measuring area
Marking
M12 connector
Measuring area