Honeywell | VF401 2-Wire Fine Pitch Ring Magnet Sensor | Datasheet | Honeywell VF401 2-Wire Fine Pitch Ring Magnet Sensor Datasheet

Honeywell VF401 2-Wire Fine Pitch Ring Magnet Sensor Datasheet
DESCRIPTION
The VF401 is a high performance, digital, 2-wire, MR
The VF401 has a reduced sensitivity to run-out (shift in sensor
(magnetoresistive) sensor in a miniature, flat, TO-92-style,
position relative to the inside or outside diameter of the ring
plastic package with a current output, designed for sensing fine
magnet). It is also less sensitive to tilt tolerance (deviation from
pitch ring magnets.
parallel positioning of the sensing elements and ring magnet),
accepting up to 10°, versus only 2° to 3° for typical ring magnet
The unique VF401 bridge array (patent number 6,297,628) has
sensors, as well as being less sensitive to twist (deviation of
been optimized to allow a greater air gap between the target
perfect angular position of the bridge runners relative to the
and the sensor with reduced loss in sensor signal or accuracy.
pole transitions).
FEATURES AND BENEFITS
Robust design operating from -40 °C to 150 °C [-40 °F to
302 °F] can withstand short durations up to 175 °C [347 °F],
allowing use in potential applications with extreme
temperature requirements.
Not damaged by reverse polarity voltages when customersupplied sense resistor is installed, enhancing protection.
Patented MR bridge optimized for stable sensing of 20- to
50-pole pair ring magnets with improved insensitivity to runout, tilt and twist.
2-wire digital current output simplifies wiring and interfacing
which can reduce total system cost
Enhanced sensitivity, ±7 Gauss typical, allows for larger air
gaps (up to 2,5 mm [0.098 in]) and higher pole density (up to
50-pole pairs depending on ring diameter).
One pulse per pole pair output and differential bridge
operation allow compatibility with differential Hall sensors
which can make it easier to upgrade existing applications.
Wide speed capability provides application flexibility with true
zero speed sensing and operation up to 3000 Hz.
Output pattern independent of gap between target and
sensor.
RoHS-compliant materials meet Directive 2002/95/EC.
POTENTIAL APPLICATIONS
Transportation
Speed encoding using a multipole ring magnet
Enhanced accuracy rotational position sensing
Wheel speed sensing
Window lift applications
Speed and direction sensing
Industrial
Shaft speed encoding using a multipole ring magnet
Enhanced accuracy rotational position sensing
Precision motor speed measurement
Speed control in machine tools
Elevator speed sensing
Speed control in motorized industrial equipment
Medical
Shaft speed encoding using a multipole ring magnet
Table 1. Absolute Maximum Ratings1
Characteristic
Supply voltage2
Magnetic flux gauss
Temperature
Min.
-18
Typ.
–
–
–
Max.
+18
Unit
V
no limit
175 [347] for 10 min
at 10 cycles
3000
°C [°F]
Frequency
–
–
Hz
Notes:
1. Absolute maximum ratings are the extreme limits the device will momentarily withstand without damage to the device. Electrical
and magnetic characteristics are not guaranteed if the rated voltage and/or currents are exceeded nor will the device
necessarily operate at absolute maximum ratings.
2. Customer-supplied sense resistor is required for negative reverse voltage.
Table 2. Specifications (Established using a 65,00 mm [2.559 in] diameter, 48-pole pair ring magnet.)
Characteristic
Condition
Min.
Typ.
Max.
Vcc1
–
–
–
–
Vh (V+ to V-)
–
4.5
–
16
Icc operate
–
11.8
14
16.80
Icc released
–
5.9
7
8.40
Icc ratio (op/rel)
–
1.9
2.0
2.3
Rise time,10% to 90%
Vcc = 12 V, RL = 150 Ohm, CL = 1000 pF,
–
1.5
–
25 °C [77 °F]
Fall time, 10% to 90%
Vcc = 12 V, RL = 150 Ohm, CL = 1000 pF,
–
1.5
–
25 °C [77 °F]
Operating temperature
–
-40 [-40]
–
150 [302]
Differential magnetic field
over entire MR bridge area:
–
–
–
operate
+7
release
-7
Air gap2
–
0.75 [0.030]
–
2.5 [0.098]
Duty cycle
–
30
50
70
Notes:
1. Vcc is limited by Vh and the value chosen for the sense resistor.
2. Sensor operation at limits for air gap is dependent on ring magnet.
Table 3. ESD and EMC Performance
Test
Specification
ESD (Electrostatic Discharge)
Electrical Transient Transmission
Unit
V
V
mA
mA
–
μs
μs
°C [°F]
Gauss
mm [in]
%
Condition
Results
GMW3100GS
–
Class 3 (low sensitivity)
ISO 7637-3
electrical capacitance and inductive coupling
Class B1
Radiated Immunity
ISO 11452-3
0.1 MHz to 12 GHz, 80% AM at 1 kHz
Class A2 at 100 V/m
Notes:
1. Class B: One or more functions may be out of specification during disturbance, but will automatically return to normal after
exposure is removed.
2. Class A: All functions remain within specification during and after exposure to disturbance.
2
www.honeywell.com/sensing
Figure 1. Electrical Specification Test Condition
Figure 2. Sensor Output
Figure 3. Block Diagram
Figure 4. Mounting Dimensions (For reference only. mm/[in].)
2X 5 DEG.
2X R 0,25
[0.010]
4,06
[0.160]
2X 45 DEG.
1,57
[0.062]
2X R 0,13
[0.005]
2X 4 DEG.
3,00
[0.118]
2X 0,64
[0.025]
2,78
[0.109]
14,98
[0.590]
Vs
2,54
[0.100]
GND
0,76
[0.030]
2X 0,38
[0.015]
Honeywell Sensing and Control
3
Order Guide
Catalog Listing
Description
VF401
2-wire MR fine pitch ring magnet sensor, standard bulk pack, 500 units per bag
Note: Bulk packaging process may affect lead straightness on some units.
WARNING
WARNING
PERSONAL INJURY
DO NOT USE these products as safety or emergency stop
devices or in any other application where failure of the
product could result in personal injury.
Failure to comply with these instructions could result
in death or serious injury.
WARRANTY/REMEDY
Honeywell warrants goods of its manufacture as being free of
defective materials and faulty workmanship. Honeywell’s
standard product warranty applies unless agreed to otherwise
by Honeywell in writing; please refer to your order
acknowledgement or consult your local sales office for specific
warranty details. If warranted goods are returned to Honeywell
during the period of coverage, Honeywell will repair or replace,
at its option, without charge those items it finds defective. The
foregoing is buyer’s sole remedy and is in lieu of all other
warranties, expressed or implied, including those of
merchantability and fitness for a particular purpose. In no
event shall Honeywell be liable for consequential, special,
or indirect damages.
While we provide application assistance personally, through
our literature and the Honeywell web site, it is up to the
customer to determine the suitability of the product in the
application.
Specifications may change without notice. The information we
supply is believed to be accurate and reliable as of this
printing. However, we assume no responsibility for its use.
MISUSE OF DOCUMENTATION
The information presented in this product sheet is for
reference only. Do not use this document as a product
installation guide.
Complete installation, operation, and maintenance
information is provided in the instructions supplied with
each product.
Failure to comply with these instructions could result
in death or serious injury.
SALES AND SERVICE
Honeywell serves its customers through a worldwide network
of sales offices, representatives and distributors. For
application assistance, current specifications, pricing or name
of the nearest Authorized Distributor, contact your local sales
office or:
E-mail: info.sc@honeywell.com
Internet: www.honeywell.com/sensing
Phone and Fax:
Asia Pacific
+65 6355-2828
+65 6445-3033 Fax
Europe
+44 (0) 1698 481481
+44 (0) 1698 481676 Fax
Latin America
+1-305-805-8188
+1-305-883-8257 Fax
USA/Canada
+1-800-537-6945
+1-815-235-6847
+1-815-235-6545 Fax
Sensing and Control
Honeywell
1985 Douglas Drive North
Golden Valley, MN 55422
www.honeywell.com/sensing
005884-2-EN IL50 GLO Printed in USA
December 2009
© 2009 Honeywell International Inc. All rights reserved.
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