Omron Z4W-V User manual

1
LED Displacement Sensor Z4W-V
Low-cost Displacement Sensor with
10-micron Resolution with Red LED
Measurement point: 25 mm;
measurement range: "4 mm.
Easy adjustment, range/stable light indicators.
Easy-to-use built-in Amp.
High-speed response: 5 ms.
Visible beam spot.
Enclosure rating: IP66.
Ordering Information
Sensing distance Resolution Model
25" 4 mm 10 µm Z4W-V25R
Selecting a Controller
The following controllers can be used with the analog output of the Z4W -V25R. Select one that suits your application.
Unit Z4W-DD1C S3A-DjK-jK3TX K3TS CQM1
Name Linear Sensor
Controller
Linear Sensor
Controller
Intelligent Signal
Processor
Intelligent Signal
Processor
Linear Sensor
Interface Unit
Model Z4W-DD1C S3A-DAK K3TX-ADj-jj K3TS-SDjjj-jj CQM1-LSE01/02
Features Ideal for dimensional
checks with
Displacement Sensors
(tolerance: " 0.1 mm).
Accurate setting
possible via gauged
dials.
Provides both
open-collector and
relay outputs.
High accurate
(" 0.1%) panel meter .
Five discrimination
levels. A vailable with
BCD output.
High-speed sampling
of 1.04 ms. Dual inputs
with arithmetic
functions. Forced zero
function and other
versatile functions
incorporated.
A sensor power supply
with a capacity of
80 mA at 12 VDC
incorporated.
Five-level
discrimination.
High-speed sampling
of 1 ms
(03 ms for timing input)
without CQM1
programs.
A forced-zero function
lets you easily change
reference points for
dif ferent workpieces.
Monitor output
available with
CQM1-LSE02.

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Specifications
Ratings
Measurement range " 4 mm
Measurement point 25" 1 mm
Light source Red LED
Spot diameter 2-mm dia. (at measurement point)
Resolution 10 microns (see Note. 1)
Linearity " 3% FS (See Note. 2)
Response time 5 ms (In case of white alumina ceramic. Linearity change according to object.)
T emperature characteristics " 0.3% FS/ °C
W arming up time 3 min (within 1% of stable value)
Indicators Stability: Stable range: Lit green
Operating range: Not lit
Dark: Lit red
Range: In range: Green
Out of range: Red
Outputs Analog output: 4 to 20 mA/ " 4 mm
Load impedance: 300 Ω max.
DARK output: NPN open collector
50 mA max., 30 VDC
Residual voltage: 1 V max.
External light 3,000 ln (incandescent light)
Characteristics
Power supply voltage 12 to 24 VDC " 10%: ripple (p-p) 10% max.
Current consumption 80 mA max.
V ibration resistance Destruction: 10 to 55 Hz (1.5-mm double amplitude, 30G max.) for 15 min each in X, Y , and Z
directions
Shock resistance Destruction: 50G for 3 times each in X, Y , and Z directions
Ambient temperature Operating: –10 ° to 55 ° C (with no icing)
Ambient humidity 35% to 85% (with no icing)
Enclosure ratings IEC: IP66
Weight 150 g (with 5-m cable); 50 g (without cable)
Attachments Mounting bracket, mounting screws, resistor (250 Ω , 0.5 W)
Note: 1. Resolution
The
resolution is the peak-to-peak displacement
conversion value of the analog output. (Condi-
tions: white alumina ceramic at the measure-
ment
point)
Displacement
Analog displacement
output
90%
10%
Tr Ti
2. Response T ime
The
delays are the 10% to 90% rising and falling
times of the analog output in response to a sud -
den
change in the displacement.
Output
fluctuation
Engineering Data
Linearity Characteristics vs. Objects
Linearity characteristic curves are obtained by detecting an object
at dif ferent positions within the measurement range and plotting the
analog output error resulting from each operation.
The LED Displacement Sensor cannot detect an object accurately if
the reflection ratio of the object is extremely small (a black object) or
extremely large (an object with a glossy surface).

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Inclined Object (Typical Example)
Measurement point
(distance in mm)
Error (% FS)
Angle: –15 ° Angle: +15 °
Error (% FS)
Measurement point
(distance in mm)
Error (% FS) Error (% FS)
Measurement point
(distance in mm)
Angle: –30 ° Angle: +30 °
Measurement point
(distance in mm)
Negative
inclination
Positive
inclination
Negative
inclination
White ceramic
Black paper
Rolled steel
plate
White ceramic
Black paper
Rolled steel
plate
Positive
inclination
Negative
inclination
White ceramic
Black paper
Rolled steel
plate
Positive
inclination
Positive
inclination
Negative
inclination
White ceramic
Black paper
Rolled steel
plate
Angle: 0 °
Error (% FS)
Measurement point
(distance in mm)
White ceramic
Black paper
Rolled steel
plate
Obliquely Positioned Object (Typical Example)
Measurement point
(distance in mm)
Error (% FS)
Angle: –15 ° Angle: +15 °
Error (% FS)
Measurement point
(distance in mm)
Error (% FS) Error (% FS)
Measurement point
(distance in mm)
Angle: –30 ° Angle: +30 °
Measurement point
(distance in mm)
Note: The LED Displacement Sen -
sor cannot detect an object
accurately
if the object is po -
sitioned at an angle oblique
to the sensor position. If the
oblique
angle is large, detec -
tion is not possible because
of insufficient reflection of
light.
This must be taken into
consideration when install-
ing
the sensor .
Positive
inclination
Negative
inclination
White ceramic
Black paper
Rolled steel
plate
Positive
inclination
Negative
inclination
White ceramic
Black paper
Rolled steel
plate
Positive
inclination
Negative
inclination
White ceramic
Black paper
Rolled steel
plate
Positive
inclination
Negative
inclination
White ceramic
Black paper
Rolled steel
plate

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Sensing Various Objects
Offset Error vs. Object Material
When detecting a variety of objects successively , refer to the of fset
error
graph below . The graph illustrates the change in sensor output
characteristics when black paper is compared to white paper . T o re -
duce the of fset error value, install the Sensor so that objects are de -
tected
at or as close as possible to the measurement point.
Offset Error Range
(Typical Example)
Measurement point
(distance in mm)
Offset Error (% FS)
Angle Characteristics
The angle characteristics were obtained by detecting an object with
different angles of inclination at the measurement point and plotting
the analog output error resulting from each operation.
The LED Displacement Sensor is designed to detect the front of an
object facing the sensor . Error occurs when the object is positioned
at an oblique angle to the sensor .
Inclined Object
(Typical Example)
Inclination angle ( °)
Error (% FS)
Obliquely Positioned Object
(Typical Example)
Error (% FS)
Inclination angle ( °)
Positive
inclination
Negative
inclination
White ceramic
Black paper
Rolled steel
plate
Positive
inclination
Negative
inclination
White ceramic
Black paper
Rolled steel
plate

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Nomenclature
Range indicator (green/red)
Stability indicator (green/red)
Optical axis marker
Transmitter Receiver
Operation
Connections/Output Circuits
Power supply (Brown) 12 to 24 VDC . . . .
GND (Blue) 0 V . . . . . . . . . . . .
DARK output (Orange) 50 mA max. at 30 VDC . . . .
Analog output (Black) 40 to 20 mA . . . .
GND (Shield)* . . . . . . . . . . . .
Load power supply
(30 VDC max.)
12 to 24 VDC
4 to 20 mA
0 V
(Red)
(White)
(Shield)
(Black) Linear
differentiator
, etc.
Signal processor
(Orange)
Note: 1. *The two ground terminals (black and shield) are inter -
nally connected. However, the black ground must be
used
with the red terminal for the power supply and the
shield ground must be used with the white terminal for
the
analog output.