MEASUREMENT SENSORS
LA
Collimated Beam Sensors
LD LA-300
Outer Diameter
Measurement
VI
Image Sensor
GP-A
Displacement Sensing
High Resolution 0.04% F.S.
GP-A
High Accuracy Eddy Current Type
Displacement Sensor
High Accuracy Analog
Sensing of Minute
Displacement
608
SERIES
Minute displacement of metallic objects
can be accurately measured with a
resolution of 0.04% F.S.
Linearity ⴣ0.5% F.S.
Displacement is accurately output
since it incorporates a high accuracy
linearity correction circuit.
Stable Temperature Characteristics
Sensor head: 0.5!m/°C
Amplifier: 0.4!m/°C
There is almost no effect of tem-
perature variations.
Different Frequency Type Also Available
Suitable for Various Analog Control Devices
Incorporates Zero-adjustment Function
The analog voltage output corres-
ponding to the standard measured
value can be forcibly set to 0V (analog
current output 4mA). This is useful for
an error check by taking the measured
master workpiece values as standard.
Job change-over can also be smoothly
done.
Further, the zero-adjustment function
can be set not only at the amplifier, but
also with an external input, so that
setting can be done even from a remote
place.
It is suitable for various analog control
devices since it is equipped with two
outputs, analog voltage (0 to 5V) and
analog current (4 to 20mA).
In case of GP-A14F type, the standard
type and the different frequency type
can be mounted next to each other. For
models besides GP-A14F type, they
can be mounted at 1/3 the interval
required for the same frequency types.
It is optimally suited for high accuracy
measurement, such as, deformation
measurement, etc., by being adjacently
mounted in a narrow space.
Choice of Sensor Heads
"5.4mm non-threaded type for 1mm
sensing, "8mm non-threaded type and
M10mm threaded type for 2mm
sensing are available. Further, long
range M12 threaded type which can
sense up to 5mm and front sensing
type which can be embedded in metal
and can sense up to 3mm have been
newly added to the sensor range. The
sensor head can be selected according
to the application and the mounting
space.
The sensor heads have superior
environmental resistance as they are
protected as per IP67 (IEC) & IP67g
(JEM) and, moreover, the cable joint
has a protector.
GP-A5S(I)
"5.4mm
GP-A14F(I)
15mm
GP-A12ML(I)
M12mm
GP-A8S(I)
"8mm
GP-A10M(I)
M10mm
609
GP-A
MEASUREMENT SENSORS
LA
Collimated Beam Sensors
LD LA-300
Outer Diameter
Measurement
VI
Image Sensor
GP-A
Displacement Sensing
Measuring iron sheet thickness
In combination with the digital panel
controller CA series, it is optimally
suited for measuring thickness of
continuous iron sheets.
Measuring gap between rollers
Fine gap measurement is possible to
control the gap between rollers.
APPLICATIONS
Measuring parallelism of chassis
Even a slight tilt can be reliably
detected.
Equipped with Useful Indicators
Compact Amplifier
Fine Adjustment of Output
Simple Connection with a Connector
Since the connection between the
sensor head and the amplifier is
connector type, simple and quick
connection is realized.
The problem of measurement error due
to variation in contact resistance in
terminal type
connection
has been
eliminated.
Fine adjustment according to the sensing conditions is possible with shift and span
functions.
Shift adjustment Span adjustment
The amplifier is equipped with an
ALARM indicator (yellow), which lights
up in case of sensor head cable
disconnection or sensor head damage,
and an OVER indicator (orange), which
lights up in case the sensing range is
exceeded.
The amplifier has a W53⳯H90⳯D67mm
compact size. Of course, it is mountable on
a DIN rail.
Maximum distance
6.5V
5V
0V
3.5V
0V
Maximum
distance
Shift adjustment
range: Ⳳ0.5V
Shift adjustment
range: Ⳳ0.5V
Ⳮ5V
ⳮ5V
Zero-adjustment
settable range
90mm
67mm
53mm
Type Appearance (mm) Sensing range Set model No.
Sensor head Amplifier
GP-A
610
MEASUREMENT SENSORS
LA
Collimated Beam Sensors
LD LA-300
Outer Diameter
Measurement
VI
Image Sensor
GP-A
Displacement Sensing
GP-A5S
GP-A5SI
GP-A8S
GP-A8SI
GP-A10M
GP-A10MI
GP-A12ML
GP-A12MLI
GP-A14F
GP-A14FI
"5.4
17
17
"8
90
67
53
17
M10
0 to 1mm
0 to 2mm
0 to 2mm
Threaded type
sensor head
Non-threaded type
sensor head Non-threaded type
sensor head
Different
frequency Different
frequency Different
frequency
For 2mm sensing For 1mm sensing
For 3mm sensing For 5mm sensing
ORDER GUIDE
OPTIONS
Sensor head mounting bracket
It enables easy fixing of the sensor head.
Digital panel controller
0 to 5mm
0 to 3mm
Please ensure to order the sensor head and the amplifier as a set. The set is calibrated and delivered.
•CA2 series
•CA series
Front sensing
type sensor head
Threaded type
sensor head
Different
frequency Different
frequency
MS-SS5
MS-SS8
CA2-T1
CA2-T4
CA-R1
CA-R4
CA-T1
CA-T4
CA-B1
CA-B4
This is a very small controller which allows
two independent threshold level settings.
•Supply voltage: 24V DCⳲ10%
•No. of inputs: 1 No. (sensor input)
•Input range: 4 to 20mA (CA2-T1)
Ⳳ5V (CA2-T4)
•Main functions:
Threshold level setting function, zero-
adjust function, scale setting function,
hysteresis setting function, start/hold
function, auto-reference function, power
supply ON-delay function, etc.
This is a multi-functional controller having
mathematical functions, hold function, etc.
•Supply voltage: 100 to 240V ACⳲ10%
•No. of inputs: 2 Nos. (sensor inputs)
•Input range: 4 to 20mA (CA-䡺1)
Ⳳ5V (CA-䡺4)
•
Power supply for sensor: 12V DC, 150mA
•Main functions:
Mathematical functions, process number
selection function, hold function, scaling
function, auto-reference function, power
supply ON-delay function, measurement
start delay function, hysteresis setting
function, etc.
NPN open-collector
transistor
Relay-contact
NPN open-collector
transistor
NPN open-collector
transistor
With BCD output
Digital panel
controller
(Note)
Mounting bracket for GP-A5S(I)
Mounting bracket for GP-A8S(I)
Sensor head
mounting bracket
Type Model No. Description
Note: For further details, refer to P.776lfor the ultra-compact digital panel controller CA2 series,
and to P.766lfor the digital panel controller CA series.
M12 21
15
5.4
34
611
GP-A
MEASUREMENT SENSORS
LA
Collimated Beam Sensors
LD LA-300
Outer Diameter
Measurement
VI
Image Sensor
GP-A
Displacement Sensing
Sensing range
Standard sensing object
Supply voltage
Current consumption
Analog output
Analog voltage output
Analog current output
Response frequency
Resolution
Linearity
Alarm output
Output operation
Short-circuit protection
External zero-adjustment input
Zero-adjustment setting method
Power indicator
Over indicator
Alarm indicator
Adjustments
Protection
Ambient humidity
Voltage withstandability
Insulation resistance
Vibration resistance
Shock resistance
Material
Cable
Cable length (Note 2)
Weight
Accessories
Sensor head
Amplifier
Sensor head
Amplifier
Sensor head
Amplifier
Sensor head
Sensor head
Sensor head
Amplifier
Sensor head
Amplifier
Sensor head
Amplifier
Sensor head
Amplifier
Sensor head
Amplifier
Type
Item
Set model No.
0 to 1mm 0 to 2mm 0 to 5mm 0 to 3mm
Iron sheet 8⳯8⳯t1mm Iron sheet 12⳯12⳯t1mm
Iron sheet 30⳯30⳯t1mm Iron sheet 15⳯15⳯t1mm
24V DCⳲ10%
150mA or less
Analog voltage
•Output voltage: 0 to 5V
•Output impedance: 100Ωapprox.
1.6kHz (ⳮ3dB)
0.04% F.S.
WithinⳲ0.5% F.S.
NPN open-collector transistor
•Maximum sink current: 100mA
•Applied voltage: 30V DC or less (between alarm output and 0V)
•Residual voltage: 1.6V or less (at 100mA sink current)
0.4V or less (at 16mA sink current)
Turns ON when the sensor head connection is improper or the sensor head cable is disconnected.
Input condition: Non-voltage contact or NPN open-collector transistor input
Signal condition: Low ... 0 to 1V (duration 30ms or more)
High ... 5 to 30V, or open
Operation: Low ... External zero-adjustment setting
High ... External zero-adjustment ineffective
Push button setting/External input setting
Green LED (lights up when the power is ON)
Orange LED (lights up when sensing range is exceeded)
Yellow LED (lights up when alarm output is ON)
1Shift adjustment (by push-buttons), 2Span adjustment (by 14-turn adjuster)
0.5!m/°C 0.6!m/°C 1!m/°C 0.6!m/°C 1!m/°C 1.5!m/°C 2.5!m/°C 0.9!m/°C 1.5!m/°C
0.4!m/°C 0.8!m/°C 2.0!m/°C 1.2!m/°C
IP67 (IEC), IP67g (JEM)
ⳮ10 toⳭ55°C, Storage:ⳮ20 toⳭ70°C
0 toⳭ50°C (No dew condensation), Storage: 0 toⳭ50°C
35 to 85% RH, Storage: 35 to 85% RH
250V AC for one min. between all supply terminals connected together and enclosure
20MΩ, or more, with 250V DC megger between all supply terminals connected together and enclosure
10 to 55Hz frequency, 1.5mm amplitude in X, Y and Z directions for two hours each
10 to 150Hz frequency, 0.75mm amplitude in X, Y and Z directions for two hours each
500m/s2acceleration (50G approx.) in X, Y and Z directions for five times each
100m/s2acceleration (10G approx.) in X, Y and Z directions for five times each
Enclosure: Stainless steel (SUS303)
Enclosure: Stainless steel (SUS303)
Enclosure: Brass (Nickel plated)
Enclosure: Stainless steel (SUS303)
Sensing part: Polyalylate
Sensing part: ABS
Sensing part: Nylon
Sensing part: ABS
Enclosure: ABS
Connector attached high frequency coaxial cable, 3m long
Up to total 100m with 0.3mm2, or more, cable
40g approx. 50g approx. (Note 3) 45g approx. (Note 3) 50g approx.
170g approx.
Adjusting screwdriver: 1 No. Nut: 2 Nos., Toothed lock washer: 1 No.
Adjusting screwdriver: 1 No.
2 Nos. each of M3 countersunk
head screws, spring washers,
plain washers and M3 nuts
Adjusting screwdriver: 1 No.
Analog current
•Output current: 4 to 20mA
•Load resistance: 0 to 350Ω
For 1mm sensing For 2mm sensing For 5mm sensing For 3mm sensing
Non-threaded type sensor head Non-threaded type sensor head
Threaded type sensor head Threaded type sensor head
Front sensing type sensor head
GP-A5S GP-A5SI GP-A8S GP-A8SI GP-A10M GP-A10MI
GP-A12ML
GP-A12MLI
GP-A14F GP-A14FI
SPECIFICATIONS
Notes: 1) These values are for a range which is 20 to 60% of the maximum sensing distance.
2) Take care that the output voltage is reduced due to the resistance of the wiring cable.
3) The given weight of the threaded type sensor head is the value including the weight of the nuts and the toothed lock washer.
()
Temperature
characteristics
(Note 1)
Ambient
temperature
Different
frequency Different
frequency Different
frequency Different
frequency Different
frequency
GP-A
612
MEASUREMENT SENSORS
LA
Collimated Beam Sensors
LD LA-300
Outer Diameter
Measurement
VI
Image Sensor
GP-A
Displacement Sensing
I/O CIRCUIT AND WIRING DIAGRAMS
I/O circuit diagram
Note: In case of using the analog voltage output, connect a
device having a high input impedance. Also, take
care that the output voltage is reduced due to the
resistance of the wiring cable.
Symbols ... D1: Input protection diode
D2:
Reverse supply polarity protection diode
ZD: Surge absorption zener diode
Tr : NPN output transistor
Wiring diagram
100mA max.
Alarm output
Analog voltage output
(0 to 5V) (Note 1)
Analog current output
(4 to 20mA)
0V (Analog output)
0V
ⳭV
Main circuit
100
Ω
47
Ω
47
Ω
Internal circuit Users’ circuitSensor head
Amplifier
Analog output
External
zero-adjustment
input
m1
D1
D2
1
3
2
4
5
7
6
8
Connector for sensor head connection
Tr ZD
Terminal No.
Ⳮ
ⳮ
24V DC
Ⳳ10%
Load
External zero-adjustment input
Alarm output
Analog voltage output (0 to 5V)
GP-A8S
ANALOG PROXIMITY SENSOR
MADE IN JAPAN
1342
OVER ALARMPOWER
1 2 3 4
8765
5786
Ⳮ
Load
Analog current output (4 to 20mA)
m1
ⳮ
Supply voltage
24V DCⳲ10%
m1
Non-voltage contact or NPN open-collector transistor
Low (0 to 1V) (duration 30ms or more): external zero-adjustment setting
High (5 to 30V, or open): external zero-adjustment ineffective
Note: After the wiring, make sure to fit the terminal covers. The terminal
cover having a concave depression at the top should be fitted on the
side having terminal Nos. 1 to 4.
SENSING CHARACTERISTICS (TYPICAL)
Correlation between setting distance and output voltage/current
GP-A5S(I)
As shown in the graph on
the left, an analog volt-
age/current proportional to
the distance from the
standard sensing object
can be obtained.
Correlation between material and output voltage/current
Setting distance L (mm)
Output voltage (V)
Output current (mA)
0.2 0.4 0.6 0.8 1
0
2
4
6
520
4
8
Aluminum Brass
Iron sheet
Stainless steel
(
SUS304
)
Stainless steel
(
SUS410
)
As shown in the graph on
the left, the analog volt-
age/current differs depend-
ing on the material of the
sensing object.
or
Terminal No.
5
6
Correlation between setting distance and output voltage/current
As shown in the graph on
the left, an analog volt-
age/current proportional to
the distance from the
standard sensing object
can be obtained.
Correlation between material and output voltage/current
As shown in the graph on
the left, the analog volt-
age/current differs depend-
ing on the material of the
sensing object.
GP-A8S(I)
GP-A10M(I)
613
GP-A
MEASUREMENT SENSORS
LA
Collimated Beam Sensors
LD LA-300
Outer Diameter
Measurement
VI
Image Sensor
GP-A
Displacement Sensing
Model No. A (mm)
Tightening torque
GP-A5S(I)
5 or more
0.44N䡠m
GP-A8S(I) 0.58N䡠m
This product is not a safety sensor. Its use is not
intended or designed to protect life and prevent body
injury or property damage from dangerous parts of
machinery. It is a normal object detection sensor.
•
Make sure to use in combination the sensor head and
amplifier which have the same production serial number
(5 digit). Since adjustment is done before shipment, if
items with different production serial numbers are
combined, the sensing characteristics will deteriorate
even if they have the same model number.
•The length of the sensor head cable cannot be
changed.
PRECAUTIONS FOR PROPER USE
Linearity in case of disc-shaped or cylindrical objects
•
In case the sensing object is disc-shaped or cylindrical, the
linearity of the analog output varies with the sensing object size.
In this case, if the analog voltage output and the analog current
output are adjusted to 0V and 4mA, respectively, when the
sensor head is in contact with the sensing object, and to 5V and
20mA, respectively, when the sensor head is 2mm
[GP-A5S(I): 1mm, GP-A12ML(I): 5mm, GP-A14F(I): 3mm] away
from the sensing object, the linearity (Ⳳ0.5% F.S.) can be
attained if the disc has a diameter of "12mm [GP-A12ML(I):
"30mm], or more, and the cylinder has a diameter of "10mm
[GP-A12ML(I): "50mm], or more and a length of 50mm.
<In case of disc>
<Non-threaded type>
<In case of cylinder>
Iron disc
Diameter "(mm)
Iron cylinder
Diameter "(mm)
Mounting sensor head
•The tightening torque should be under the value given
below.
Mounting with set screw
•
Make sure to use an M3 or smaller set screw having a cup-point.
Set screw (M3 or less)
(Cup-point)
A
Model No.
B part (mm)
Tightening torque
GP-A10M(I)
7 or more
9.8N䡠m
GP-A12ML(I)
14 or more
20N䡠m
Mounting with nut
GP-A10M(I)
Mounting GP-A14F(I)
GP-A12ML(I)
B
Attached toothed
lock washer
Mounting plate
B
Attached toothed
lock washer
Mounting plate
Note: Do not apply excess torque.
<Threaded type>
SENSING CHARACTERISTICS (TYPICAL)
Correlation between setting distance and output voltage/current
GP-A12ML(I)
0
2
5
4
6
8
4
20
2468
L
Output voltage (V)
Output current (mA)
Setting distance L (mm)
Standard sensing object
Iron steet 30⳯30⳯t1mm
As shown in the graph on
the left, an analog volt-
age/current proportional
to the distance from the
standard sensing object
can be obtained.
Correlation between material and output voltage/current
0
2
5
4
6
8
4
20
12345
Iron
Stainless steel
(SUS304)
Stainless steel
(SUS410)
Brass
Aluminum
Output voltage (V)
Output current (mA)
Setting distance L (mm)
As shown in the graph on
the left, the analog volt-
age/current differs depend-
ing on the material of the
sensing object.
Correlation between setting distance and output voltage/current
GP-A14F(I)
0
2
5
4
6
8
4
20
1234
L
Standard sensing object
Iron steet 15⳯15⳯t1mm
Output voltage (V)
Output current (mA)
Setting distance L (mm)
As shown in the graph on
the left, an analog volt-
age/current proportional
to the distance from the
standard sensing object
can be obtained.
Correlation between material and output voltage/current
0
2
5
4
6
8
4
20
1234
Iron
Stainless
steel
(SUS304)
Stainless
steel
(SUS410)
Brass
Aluminum
Output voltage (V)
Output current (mA)
Setting distance L (mm)
As shown in the graph on
the left, the analog volt-
age/current differs depend-
ing on the material of the
sensing object.
8mm 2-M3 tapped holes
or thru-holes
Plain washer
Spring washer
M3 nut
M3 countersunk
head screws
GP-A
614
MEASUREMENT SENSORS
LA
Collimated Beam Sensors
LD LA-300
Outer Diameter
Measurement
VI
Image Sensor
GP-A
Displacement Sensing
10
or less
3.2 or more
6 or less
19
or less
6
or less
10
or less
"3.2 or more
6 or less
19
or less
6
or less
Y type Round type
PRECAUTIONS FOR PROPER USE
Mounting on DIN rail
Mounting amplifier
Dimensions of suitable crimp terminals
1With the stopper pressed in
the direction of the arrow (it
locks), fit the front portion of
the mounting section of the
amplifier on the 35mm width
DIN rail.
Lightly press the grooved
section of the stopper
downwards when pressing
the stopper in.
2Press and fit the rear portion
of the mounting section on
the 35mm width DIN rail.
mTo remove, insert a ‘minus’
screwdriver into the stopper
and pull out.
Mounting with screws
•
Use two commercially available
M4 pan head screws (length
10mm or more).
The tightening torque should
be 1.2N䡠m or less.
Please arrange the pan head
screws and nuts separately.
The mounting holes for the
screws can be accessed by
removing the terminal cover.
To remove the terminal cover,
insert a ‘minus’ screwdriver
into the groove of the terminal
cover and lift up.
35mm width DIN rail
Stopper
2
1
‘Minus’ screwdriver
Stopper
GP-A8S
ANALOG PROXIMITY SENSOR
MADE IN JAPAN
1234
POWERALARM
OVER
GP-A8S
ANALOG PROXIMITY SENSOR
MADE IN JAPAN
1234
POWERALARM
OVER
Nut
(Please arrange separately.)
M4 pan head screw
(length 10mm or more)
(Please arrange separately.)
()
Notes: 1)
If two, or more, amplifiers are mounted together, make sure to leave
a gap of at least 10mm between them.
2) If the amplifier is installed in a control box, etc., ensure proper
ventilation.
Note: D o no t pu ll by h olding the cable, as this can result in cable
disconnection.
•Hold the sensor head’s
connector by the outer ring
and insert it into the
connector provided on the
amplifier for sensor head
connection. Insert till you
hear a click sound.
mTo remove the sensor
head, hold its connector
by the outer ring and pull
it straight out.
Connection of sensor head and amplifier
GP-A8S
ANALOG PROXIMITY SENSOR
MADE IN JAPAN
1234
Connector for
sensor head
Connector
outer ring
Amplifier
(Unit: mm)
(After crimping) (After crimping)
Note: Please use crimp terminals which have insulation sleeves.
Recommended crimp terminal: Type 1.25 – 3.0
Wiring
•Make sure to carry out the wiring in the power supply off
condition.
•Verify that the supply voltage variation is within the rating.
•If power is supplied from a commercial switching regulator,
ensure that the frame ground (F.G.) terminal of the power
supply is connected to an actual ground.
•In case noise generating equipment (switching regulator,
inverter motor, etc.) is used in the vicinity of the sensor
head or the amplifier, connect the frame ground (F.G.)
terminal of the equipment to an actual ground.
•Do not run the wires together with high-voltage lines or
power lines or put them in the same raceway. This can
cause malfunction due to induction.
GP-A5S(I)
GP-A12ML(I)
GP-A14F(I)
GP-A8S(I)
GP-A10M(I)
Between ‘I’ type
and non-‘I’ type
Between two ‘I’ types
or two non-‘I’ types
Between ‘I’ type
and non-‘I’ type
Between two ‘I’ types
or two non-‘I’ types
Between ‘I’ type
and non-‘I’ type
Between two ‘I’ types
or two non-‘I’ types
Between ‘I’ type
and non-‘I’ type
Between two ‘I’ types
or two non-‘I’ types
Distance from surrounding metal
•As metal around the sensor may affect the sensing
performance, pay attention to the following points.
Model No.
C (mm) D (mm)
GP-A5S(I)4
GP-A8S(I)"18
GP-A10M(I)7
GP-A12ML(I)"50 14
<Embedding of the sensor in metal>
•
Since the analog output may change if the sensor is
completely embedded in metal, keep the minimum distance
specified in the table below. GP-A14F(I) can be used by being
completely embedded in metal. However, the surrounding
metal should not protrude beyond the sensing face.
D
C
Metal
Metal
Mutual interference
•If several sensor heads are mounted together, since the
specifications may not be met, keep the minimum
separation distance given below.
Face to face mounting
Parallel mounting
Face to face mounting
Parallel mounting
E
F
Notes: 1) ‘I’ type is different fre-
quency type.
2)
If the required resolution is
lower than the specification
(0.04% F.S.), it is possible to
bring the sensor heads
nearer than the separation
distances given in the table
above. For further details,
please contact our office.
Non-threaded type sensor head
threaded type sensor head
<Front sensing type sensor head>
E (mm) F (mm)
18 11
50 36
22 11
60 38
24 14
210 130
14 0
68 30
Model No.
Condition
<Front sensing type sensor head>
E
Sensing face
FF
Non-threaded type sensor head
threaded type sensor head
615
GP-A
MEASUREMENT SENSORS
LA
Collimated Beam Sensors
LD LA-300
Outer Diameter
Measurement
VI
Image Sensor
GP-A
Displacement Sensing
Others
•Do not use during the initial transient time (0.5 sec.) after
the power supply is switched on.
•Do not use the sensor at places having intense vibrations,
as this can cause malfunction.
•Avoid dust, dirt, and steam.
•Take care that the product does not come in direct contact
with water, oil, grease, or organic solvents, such as,
thinner, etc.
•Take care that the sensing face is not covered with metal
dust, scrap, etc., as this can cause malfunction.
1
2
3
4
5
6
7
8
9
Power indicator
(Green)
Over indicator
(Orange)
Alarm indicator
(Yellow)
Span adjuster
Zero-adjustment
button
Shift-up button
Shift-down
button
Button operation
effective/ineffective
selection switch
Connector for
sensor head
Lights up when the power is ON.
Lights up when the sensing range is exceeded.
Lights up when the sensor head connection is
improper or the sensor head cable is disconnected.
Analog output’s output voltage range and output current
range can be adjusted. It is a 14-turn potentiometer.
The zero-point of the analog output can be set.
Further, if it is pressed continuously for 3 sec., or
more, the zero-point value can be erased.
Analog output’s offset value
can be increased.
Analog output’s offset value
can be decreased.
If it is set to the ‘LOCK’ side, the operation of the
zero-adjustment button, the shift-up button and the
shift-down button is ineffective.
Set it to the ‘FREE’ side during adjustment, and to
the ‘LOCK’ side during sensing.
The values of zero-point setting and shift
adjustment are stored in an EEPROM (memory)
whenever the switch is changed from the ‘FREE’
side to the ‘LOCK’ side.
It is the connector for sensor head connection.
Description Function
PRECAUTIONS FOR PROPER USE
Functional description
POWER OVER ALARM
SHIFT
FREE
LOCK
SPAN
O-ADJ.
1
2
3
6
7
9
4
5
8
mCover opened condition
If both the buttons
are pressed simulta-
neously for 3 sec., or
more, the set value
can be erased.
Alarm output
•It is output when the sensor head connection is improper
or the sensor head cable is disconnected.
•The alarm output is not incorporated with a short-circuit
protection circuit. Do not connect it directly to a power
supply or a capacitive load.
External zero-adjustment input
•The external zero-adjustment input should be applied
30 min., or more, after the power supply is switched on.
•
Zero-adjustment can be remotely done by an external input
by using the zero-adjustment input terminals (terminal Nos. 5
and 6).
•If the external zero-adjustment input terminals (terminal
Nos. 5 and 6) are short-circuited for 30ms, or more, the
analog voltage output and the analog current output are
forcibly set to 0V and 4mA, respectively.
External
zero-adjustment
input
m1
8765
5786
OVER ALARMPOWER
m1
Non-voltage contact or
NPN open-collector transistor
6
5
or
Terminal No.
Low (0 to 1V) (duration 30ms or more):
external zero-adjustment setting
High (5 to 30V, or open):
external zero-adjustment ineffective
•The external zero-adjustment input operation is
independent of the state of the
‘
button operation effec-
tive/ineffective selection switch
’
.
However, since the external zero-adjustment setting is not
stored in the EEPROM (memory), it is canceled when the
power supply is switched off. In case it is desired to store
the setting in the EEPROM, set the ‘button operation
effective/ineffective selection switch’ once to the ‘FREE’
side and again to the ‘LOCK’ side, before switching off the
power supply.
Note: If the power supply is switched on with the external zero-adjustment
input terminals (terminal Nos. 5 and 6) short-circuited, since zero-
adjustment gets done in the transient state of the power supply
switching on, stable sensing is not possible.
Further, ensure to apply the zero-adjustment input 30 min., or more,
after the power supply is switched on.
GP-A
616
MEASUREMENT SENSORS
LA
Collimated Beam Sensors
LD LA-300
Outer Diameter
Measurement
VI
Image Sensor
GP-A
Displacement Sensing
PRECAUTIONS FOR PROPER USE
Adjustment
•This product is delivered after being adjusted with the
standard sensing object. However, since there is some
difference due to the sensing object being used, carry out
the adjustment as per the following procedure, using a
voltmeter or ammeter, oscilloscope, etc.
1Switch on the power supply after confirming that proper
connection has been made to the external device to
which GP-A is to be connected.
2Start the adjustment 30 min., or more, after switching on
the power supply.
3
Open the cover on the top of the
amplifier and set the ‘button operation
effective/ineffective selection switch’
to the ‘FREE’ side.
4Touching the sensor head to the sensing object, press
the
‘
zero-adjustment button
’
and set the zero-point.
At this time, the analog voltage output and the analog
current output are forcibly set to 0V and 4mA,
respectively.
Button operation
effective/ineffective
selection switch.
FREE
LOCK
Sensing object
Touch
Sensor head
O-ADJ.
Zero-adjustment button
Press
Sensing object
Sensor head
Maximum distance
Span adjuster
SPAN
5
Set the sensor head at the maximum distance [GP-A5S(I):
1mm, GP-A8S(I) and GP-A10M(I): 2mm, GP-A12ML(I):
5mm and GP-A14F(I): 3mm ] from the sensing object.
At this time, adjust the analog voltage output toⳭ5V or the
analog current output to 20mA with the ‘span adjuster’.
Note: Since the analog voltage output and the analog current output get
adjusted simultaneously, it is not possible to adjust them individually.
6
Once again, touch the sensor head to the sensing object,
and confirm that the analog voltage output and the
analog current output are 0V and 4mA, respectively.
In case they are not, repeat the adjustment from step
4.
7The following shift adjustment and span adjustment can
be done if required.
Shift adjustment range
<Analog voltage output><Analog current output>
0V
Maximum
distance
Shift adjustment
range: Ⳳ0.5V
Shift adjustment
range: Ⳳ0.5V
Ⳮ5V
ⳮ5V
Zero-adjustment
settable range
•Using the ‘shift-up button’ and
the ‘shift-down button’, it is
possible to adjust the offset
value for the analog voltage
output byⳲ0.5V and that for
the analog current output by
Ⳳ1.6mA.
Shift-up button
Press
Shift-down button
Press
SHIFT
•As long as the sensing object is within the sensing range,
the analog voltage output and the analog current output
can be adjusted to 0V and 4mA, respectively, with the
‘zero-adjustment button’.
Note:
The analog current output is limited to a lower limit of 3mA and an upper
limit of 23mA by a control circuit.
Note: Since the span adjustment can be done irrespective of the ‘button
operation effective/ineffective selection switch’ position, do not operate
the span adjuster after the adjustment.
Span adjustment range
•The output span (slope) can be adjusted with the ‘span
adjuster ’ over a range of 0.7 to 1.3 times than that for the
standard sensing object.
Maximum distance
6.5V
5V
0V
3.5V
Span adjuster
0.7 times 1.3 times
SPAN
8After the adjustment, make sure to
set the ‘button operation effec-
tive/ineffective selection switch’ to
the ‘LOCK’ side and close the cover
on top of the amplifier.
FREE
LOCK
•
The values of zero-point setting and shift adjustment get
stored in an EEPROM when the switch is set to the ‘LOCK’
side. The values stored in the EEPROM are not erased
even when the power supply is switched off.
However, kindly note that the EEPROM has a life span and
its guaranteed life is 100,000 write operation cycles.
Button operation
effective/ineffective
selection switch
Notes: 1) The set values are not stored in the EEPROM if the power supply
is switched off when the switch is on the ‘FREE’ side.
2) If the switch is set to the ‘LOCK’ side before adjustment, the set
values cannot be changed.
4mA
20mA
3mA
0mA
23mA
Shift adjustment
range: Ⳳ1.6mA
Maximum distance
Shift adjustment
range: Ⳳ1.6mA
Zero-adjustment
settable range
617
GP-A
MEASUREMENT SENSORS
LA
Collimated Beam Sensors
LD LA-300
Outer Diameter
Measurement
VI
Image Sensor
GP-A
Displacement Sensing
AB
4
484
16
C
D
2 -"3.5 mounting holes
"5.4
"2.5 high frequency coaxial
cable 3m long
Connector
25.7
"6.4
6.217
17
25.7
"6.4
6.217
"817
"2.5 high frequency coaxial
cable 3m long
Connector
Toothed lock washer
(internal tooth)
M10⳯1
6.2
25.7
17
3
14 17
"18
"6.4
"2.5 high frequency coaxial
cable 3m long
Connector
Connector for sensor head connection
Suitable for 35mm width DIN rail
90
53 6.5
(100)
(119)
67
19.8
7
2
1234
Shift-up button
Shift-down button
5678
Button operation effective/
ineffective selection switch
Zero-adjustment button
Span adjuster
Alarm indicator (Yellow)
Over indicator (Orange)
Power indicator (Green)
76
39
2-"8.2
2-"5 mounting holes
DIMENSIONS (Unit: mm)
Mounting bracket for GP-A5S(I) (Optional), mounting bracket for GP-A8S(I) (Optional)
Material: Nylon 66
MS-SS5
MS-SS8
Amplifier
GP-A5S(I)
GP-A8S(I)
GP-A10M(I)
Connector
"2.5 high frequency
coaxial cable 3m long
"6.4
17
25.7
17
"21
21
7
3.5
"10.1
M12⳯1
6.2
Toothed lock washer (internal tooth)
GP-A14F(I)
GP-A12ML(I)
All models
Cover removed condition
MS-SS5 MS-SS8
A1820
B1011
C 8.3 10.3
D 6.1 6.5
Applicable model GP-A5S(I)GP-A8S(I)
Model No.
Item
Sensor head
25.7
17
8
"6.4
5.4
34
7.5 27.5
15
Connector
Center of sensing 2-countersunk mounting holes for M3
"2.5 high frequency
coaxial cable 3m long