0.5±0.2
1.0
+0.15
0.2
20±0.3
180±10
s
Features
1. Sensing over wide range of rotation speed including
a complete halt.
2. Compact package and light weight.
3. Simple installation by easy adjusting of a signal
output and gap distance.
4. Best suited for harsh environments.
0
ø12.7
–0.2
ø10±0.3
UL1007 AWG24
Sensing di
Red
MR1
Black
MR2
Vout
Vin
MR1
s
Applications
1. Rotation speed detection of Factory Automation
equipment.
2. Rotation position detection.
3. Proximity Switch.
Supply
Voltage
(V)
5
Output Voltage
(Vp-p)
0.5 min.(at 25°C,Gap=0.2mm)
White
GND
Element
Part Number
FR05CM21AR
Total
Response Operating
Resistance Frequency Temperature
(k ohm)
(kHz)
(°C)
0.7 to 1.5
0 to 100
-10 to 70
Target Gear
Module
0.3 to 1.0
Phase Diff
Singl
s
Output Wave Form
. 1
= 2Vin
.
Output Voltage(Vout)
0
π
2
π
t
Cat.No.S35
2
s
Features
1. By monitoring the phase shift direction the gear
rotation direction can be detected.
2. Wide sensing range from high speed to a complete
halt.
3. Good Signal-to-Noise ratio ; high resolution ;
high sensitivity.
Sensing direction
a aa
a=0.314
ø17.0±0.1
18±0.3 10±0.3
ø0.7±0.1
A
MR2
MR1
MR3
MR4
C1
Numbering
Sensing direction mark
MR1
5±0.3
MR3
MR
MR
s
Applications
1. Detection of gear rotation speed and direction in
Factory Automation equipment.
2. Detection of the direction of Linear motion servo.
3. Motor controller for vehicles.
4. Measuring the needle position in industrial
knitting machine.
Supply
Voltage
(V)
5
Output Voltage
(Vp-p)
0.45 min.(at 25°C,Gap=0.15mm)
Total
Response Operating
Resistance Frequency Temperature
(k ohm)
(kHz)
(°C)
0.2 to 1.0
0 to 100
-10 to 80
Target Gear
Module
0.4
(in m
Part Number
FR05CM12AL
Phase Diff
90deg.+/-
s
Output Wave Form
Va
Output Voltage(Vout)
Vb
Gear : rotating in "A" direction
.
= 1 Vin
.2
0
π
2
π
3
π
2
2
π
t
2
MR elements(Inside)
s
Features
1. Dual digital output.
2. LED indicators, for quick status check.
3. Easy mounting and connection.
Sensing surface
M16×1
Name plate-two places
2
LED Connector A
ø21±1
A
Sensing direction
3±1.5
35±0.05
65±1
74±2
14±1.5
F
s
Applications
1. Servo controller for linear motion of NC machine.
2. Controller for robot arm.
3. Controller for injection speed of moulding machine.
3–0.5
MR
elements pitch
Part Number
FR12AM32AC
Supply
Voltage
(V)
12
+/-2V
Output Voltage
(V)
Low Level=0.5 max.(at 25°C,Gap=max.0.3mm)
High Level=4.5 min.(at 25°C,Gap=max.0.3mm)
Total
Response Operating
Resistance Frequency Temperature
(k ohm)
(kHz)
(°C)
297 to 363
0 to 20
-10 to 70
Target Gear
Module
0.635
Sensing direction
A
MR3
MR4
MR2
MR1
Phase Diff
90deg.+/-4
Supply Current:100mA max.
s
Output Wave Form
T
Gear : rotating in "A" direction
s
Block Diagram
C
T/2±2T/9
Va
T/2±2T/9
Regulator
+5
Vout
V
A
V
B
V
T/4±T/9
E
GND
G
T/2±2T/9
T/2±2T/9
F
G
Vb
s
LED Indicator
Output
LED Color
Va
Vb
High
High
Off
Low
High
Red
Low
Low
Orange
High
Low
Green
Sensing direction
A
MR for Quad Phase
3.5
Numbering
ø22.5
–0.1
0
s
Features
1. Higher signal level and higher common-mode noise
rejection with a differential amplifier.
2. Index phase Z to locate the home position of the
gear.
3. Compact package for easy mounting.
4. Anticorrosive stainless steel case.
C0.3
12345678 MR for
INDEX Phase
20
–0.3
0
0.5
2
25±1
P
1 Vin
2 V
A
3 V
A
4 V
B
5 V
B
6 V
Z
8 R
Z
7 GND
4.5
P=2.5
s
Applications
AC servo motor controller for NC machine.
4
Part Number
FR05CM65AF
Supply
Voltage
(V)
5
Output Voltage
(Vp-p)
0.3 min.(Phase:A-B,at 25°C,Gap=max.0.3mm)
0.6 min.(Phase:Z,at 25°C,Gap=max.0.3mm)
Total
Response Operating
Resistance Frequency Temperature
(k ohm)
(kHz)
(°C)
0.1 to 1.0
0 to 100
-10 to 80
Target Gear
Module
0.4
(Phase:A-B)
Phase Diff
90deg.+/-
(Phase:A
s
Output Wave Form
Gear : rotating in "A" direction
Output Voltage
(Vout)
.
= 1 Vin
.2
s
Phase Difference
Phase
AYB
AYA
BYB
V
A
V
B
V
A
V
B
Phase Difference (deg.)
90±5
180±10
180±10
t
MR for Quad Phase
MR for INDEX Phase
Output Voltage
(Vout)
. 1
= 2Vin
.
Rz(Neutral
Voltage)
Vz
t
4
1. FR sensor consists of semiconductive magnetoresistors
and a permanent magnet.
2. FR sensor detects the position and the speed of a gear
over a wide range of frequency including a complete halt.
3. Non-contact sensing mechanism guarantees a long life.
4. Rugged and reliable, suitable for motor control for Factory
Automation.
5. A variety of applications is possible with multiphase type.
Target Gea
Rotary Sensor
s
Magnetoresistive Effect
A change in the resistance of a ferromagnetic or
semiconductive material when it is subjected to magnetic
flux. Used in Murata's sensor is InSb which exhibits very
high magnetoresitive effect in Fig. 1.
R(ohm)
1,000
500
0.3
0.2
S
0.1
0
B(T)
0.1
N
0.2
0.3
Fig. 1
s
Principle of Operation
As a magnetic material moves over the sensing surface, the
magnetic flux distribution across the magnetoresistors
varies.
This causes MR element resistance change and produces
output signal as indicated in Fig. 2.
Therefore, when it is placed close to the magnetic gear as
shown in Fig. 3, the sensor output a signal synchronized to
gear rotation.
The count of signal's peaks is equal to the number of gear
teeth passing over the sensor.
Output Voltage(Vout)
3
.
=1/2 Vin
.
1
2
Vcc
MR1
Vout
MR2
GND
Magnetic material
MR element
MR1
MR2 MR1
MR2 MR1
N
S
1
N
S
2
N
S
3
MR
Magnet
Fig. 2
Vcc
Vout
Gear
GND
Output Voltage (FR05CM21AR)
Fig. 3
Output Voltage
Sensor
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