Omron E2K-C User manual

D-183E2K-C
E2K-C
Long-distance Capacitive Proximity Sensor
E2K-C
Capacitive Proximity Sensor
with Adjustable Sensitivity
• Detects both metallic and non-metallic objects (glass,
lumber, water, oil, plastic, etc.) without direct contact.
• DC models acquire CE marking
Ordering Information
Sensors
Accessories (Order Separately)
Mounting Brackets
Shape Sensing distance
Model
Output specifications Operating status
NO NC
DC 3-wire NPN
DC 3-wire PNP
E2K-C25ME1
E2-KC25MF1
E2K-C25ME2
E2K-C25MF2
Shape Model Quantity Remarks
Y92E-A34 1 Supplied with the product.
34 dia.
Unshielded
3 to 25mm
F502-EN2-04.book Seite 183 Dienstag, 26. Juli 2005 5:48 17

D-184 Capacitive Sensors
Rating/Performance
* The set distances are sensing distances applicable to standard sensing objects. Refer to Engineering Data for sensing distances applicable to other types of objects.
Item Model E2K-C25M#1E2K-C25M#2
Sensing distance * 25 mm
Sensing distance
adjustable range
3 to 25 mm
Sensing object Conductors and dielectrics
Standard sensing object with grounded metal: 50 x 50 x 1t mm
Differential distance 15% max. of sensing distance (when adjusted to 25 mm ±10% with standard object)
Response frequency 70 Hz
Power supply(Operating
voltage range) 12 to 24 VDC, ripple (p-p): 10% max.,(10 to 40 VDC)
Current consumption E models: 10 mA max. at 12 VDC, 16 mA max. at 24 VDC
Leakage current Y models: 1 mA max. at 100 VAC (50/60 Hz) with output turned OFF., 2 mA max. at 200 VAC (50/60 Hz)
with output turned OFF.
Control
output
Switching
capacity 200 mA max.
Residual
voltage 2 V max. (under load current of 200 mA with cable length of 2 m)
Indicator lamp Detection indicator (red LED)
Operating status
(with sensing object
approaching)
E1, Y1 models: NO
E2, Y2 models: NC
Protective circuits Reverse connection protection, surge absorber
Ambient temperature Operating/Storage: -25°C to 70°C (with no icing or condensation)
Ambient humidity Operating/Storage: 35% to 95%RH (with no condensation)
Temperature influence ±15%max. of sensing distance at 23° within temperature range -10°C to 55°C
Voltage influence ±2% max. of sensing distance at a voltage between 85% and 115% of the rated power supply voltage
Insulation resistance 50 M min. (at 500 VDC) between current carry parts and case
Dielectric strength 1000 VAC 50/60 Hz for 1 min
between energized part and case
Vibration resistance 10 to 55 Hz, 1.5 mm double amplitude for 2 hours each in X, Y, and Z directions
Shock resistance Destruction: 500 m/s2for 10 times each in X, Y, and Z directions
Protective structure IEC 60529 IP66
Connection method Pre-wired models (standard length: 2 m)
Weight (Packed state) Approx. 200 g
Material
Case
Heat-resistant ABS resin
Sensing
surface
Accessories Mounting bracket, instruction manual
F502-EN2-04.book Seite 184 Dienstag, 26. Juli 2005 5:48 17

D-185E2K-C
E2K-C
Characteristic data (typical)
Sensing Distance Change by Sensing Object (Typical)
Output Circuit Diagram
DC 3-wire Models
Operating
status Model Timing chart Output circuit
NO E2K-C25ME1
NC E2K-C25ME2
NO E2K-C25MF1
NC E2K-C25MF2
25
20
15
10
5
0
Sensing distance X (mm)
Standard sensing object
(50 x 50 x t1) Phenol resin
(50 x 50 x 15)
Neoprene rubber
(50 x 50 x 15)
Glass
(200 x 50 x t3)
Lavan plate
(160 x 120 x t15)
Resin pellet
(Duracon)
500 ml milk
(pure water)
Flour
Sugar
Salt
Yes
No
Operates
Releases
H
L
ON
OFF
Load
(between brown and black)
Output voltage
(between black and blue)
Operation indicator (red)
Sensing object
Main
circuit
Load
Brown
Brack *1
Output *2
Blue
4.4kW
+V
0V
Tr
* 1. 200 mA max. (load current)
* 2. When a transistor is connected
Yes
No
Operates
Releases
H
L
ON
OFF
Load
(between brown and black)
Output voltage
(between black and blue)
Operation indicator (red)
Sensing object
Yes
No
Operates
Releases
H
L
ON
OFF
Load
(between brown and black)
Output voltage
(between black and blue)
Operation indicator (red)
Sensing object
Brown
+V
Tr
Black
*2
*1
2.2W
4.7kW
Blue
0V
Output
Main
circuit
100W
Load
* 1. Maximum load current: 200 mA
* 2. Current flows in this direction
if the circuit incorporates the transistor.
Yes
No
Operates
Releases
H
L
ON
OFF
Load
(between brown and black)
Output voltage
(between black and blue)
Operation indicator (red)
Sensing object
F502-EN2-04.book Seite 185 Dienstag, 26. Juli 2005 5:48 17

D-186 Capacitive Sensors
Operation
Sensitivity adjustment
Remove the rear rubber cap of the E2K-C and turn the poten-
tiometer in the hole to adjust the sensitivity of the E2K-C.
The sensing distance increases by turning the potentiometer
clockwise and decreases by turning the potentiometer coun-
terclockwise. The potentiometer can make 15±3 valid turns
and then make slip turns because the potentiometer does not
have a stopper. The slip turns will not, however, damage the
potentiometer.
1. Slowly turn the potentiometer clockwise until the E2K-C
turns on with no sensing object.
2. Turn the potentiometer counterclockwise until the E2K-C
turns off with the sensing object located within the sensing
distance.
3. The E2K-C will be in stable operation if there is a difference
of 1.5 turns or more between the points the E2K-C is turned
on and off, otherwise the E2K-C will not be in stable oper-
ation.
4. Set the potentiometer midway between the two points.
5. If the distance of each sensing object varies, take step 2
with the sensing object located at the farthest sensing dis-
tance to be applied.
Remove this rubber
cap and adjust the
potentiometer.
Potentiometer
Stop turning the potentiometer
at the moment the E2K-C turns off.
Potentiometer
Stop turning the potentiometer
at the moment the E2K-C turns off.
The point the
E2K-C turns on.
The point the
E2K-C turns off.
Stable detection if the
difference is 1.5 turns or more.
The point the
E2K-C turns on.
The point the
E2K-C turns off.
Midway
F502-EN2-04.book Seite 186 Dienstag, 26. Juli 2005 5:48 17

D-187E2K-C
E2K-C
Precautions
Design
Effects of Surrounding Metal
During Proximity Sensor installation provide a distance of 80
mm min. from the surrounding metal objects to prevent the
Sensor from being affected by metal objects other than the
sensing object.
If installing the Sensor with the L-shaped mounting bracket,
provide a distance of 20 mm min. between the face of the
sensing head and the mounting bracket.
Mutual Interference
Space the two Sensors at a distance exceeding 100 mm to
prevent mutual interference.
Effect of High-frequency Electro-magnetic Field
The E2K-C may malfunction if there is an ultrasonic washer,
high-frequency generator, transceiver, or inverter nearby.
Sensing Object
• Sensing Object Material. The E2K-C can detect almost
any type of object. The sensing distance of the E2K-C, how-
ever, will vary with the electrical characteristics of the ob-
ject, such as the conductance and inductance of the object,
and the water content and capacity of the object. The max-
imum sensing distance of E2K-C will be available if the ob-
ject is made of grounded metal.
• Indirect Detection. In the case of the detection of objects
in metal containers, each metal container must have a non-
metallic window.
Miscellaneous
Organic Solvents
E2K-C has a case made of heat-resistant ABS resin. Be sure
that the case is free from organic solvents or solutions con-
taining organic solvents.
Correct Use
20 mm min. 80 mm min.
80 mm min. 80 mm min.
80 mm
min.
Sensing surface
Metal
Be sure to ground
Surrounding conductive object Surrounding conductive object
100 mm min.
100 mm min.
Face-to-dace Mounting Parallel Mounting
F502-EN2-04.book Seite 187 Dienstag, 26. Juli 2005 5:48 17

D-188 Capacitive Sensors
Dimensions (Unit: mm)
Sensors
Accessories (Order Separately)*
E2K-C25M##
* E models: Detection indica-
tor (red); Y models: Opera-
tion indicator (red)
L-shaped Mounting Bracket
Y92E-A34
* Attached to the product.
82
34 dia.
20
7
Cap cord
13
Cord clamp
Screw hole for sensitivity adjustment
Operation indicator *
E type: 6-dia. three conductors vinyl-insulated round cable (cross-sectional
area of conductors: 0.5 m‡u; insulation diameter: 1.9 mm) Standard length: 2 m
Y type: 6-dia. two conductors vinyl-insulated round cable (cross-sectional area
of conductors: 0.5 m‡u; insulation diameter: 1.9 mm) Standard length: 2 m
45
43 6.3
5.2 R2.6
Two elliptic holes
for bracket mounting
35
2
23.5
15
Two, M4 sensor clamping screws
42
30
35
6
E2K Proximity Sensor
With Mounting Bracket Attached
* The holes are not drilled straight through.
Drill through the holes before using them.
Sensor mounting holes
Two, 5.5-dia. mounting holes *
54.4
45
57.6
51
14
30
In the interest of product improvement, specifications are subject to change without notice.
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.
Cat. No. D016-E2-04-X
F502-EN2-04.book Seite 188 Dienstag, 26. Juli 2005 5:48 17