Adjustable Capacitive Prox E2K-C Cylindrical Sensor Offers Adjustable Detecting Distance

E2K-C

Adjustable Capacitive Prox

Cylindrical Sensor Offers

Adjustable Detecting Distance

■

Permits non-contact detection of metallic and non-metallic objects such as glass, wood, water, oil and plastic

■

Allows indirect detection of materials inside non-metallic containers

■

Adjustable detecting distance from 3 to 25 mm

■

Built-in amplifier accepts wide range of supply voltages and switches up to

200 mA

■

Mounting bracket included

Ordering Information

■ SENSORS

Type

Nominal detecting distance

Output type

Part number

AC switching type (SCR)

DC switching type

NPN

PNP

■ REPLACEMENT PARTS

Description

Mounting bracket for E2K-C (supplied with sensor)

Unshielded

3 to 25 mm (0.12 to 0.98 in), adjustable

NO NC

E2K-C25MY1

E2K-C25ME1

E2K-C25MF1

E2K-C25MY2

E2K-C25ME2

E2K-C25MF2

Part number

Y92E-A34

E2K-C

E2K-C

2

E2K-C E2K-C

Specifications

Part number

Sensor type

Body

Supply voltage

Size

Type

Current consumption

Detectable object type

Sensitivity

Effective maximum detecting distance (with standard target)

E2K-C25M ❑❑

Capacitive

34 mm (1.34 in) diameter

Unshielded

10 to 40 VDC, 10% max. permissible ripple peak to peak

10 mA max. at 12 VDC

15 mA max. at 24 VDC

Metallic and non-metallic objects

Adjustable

3 to 25 mm

(0.12 to 0.98 in)

E2K-C25MY ❑

90 to 250 VAC, 50/60 Hz

1 mA max. at 100 VAC

2 mA max. at 200 VAC

Standard target size

(grounded mild steel, L x W x H)

Differential travel

50 x 50 x 1 mm

(2.0 x 2.0 x 0.04 in)

15% max. of detecting distance

Control output

AC solidstate

Type

Max. load

Min. load

Max. off-state leakage current

Max. on-state voltage drop

Type

—

—

—

—

—

DC solidstate

Response frequency

Max. load

Max. on-state voltage drop

Circuit protection

Output shortcircuit

DC power supply reverse polarity

Indicators

Materials

Mounting

Connections

NPN-NO open collector with pull-up

NPN-NC open collector with pull-up

PNP-NO open collector with pull-down

PNP-NC open collector with pull-down

200 mA

See “Residual Load Voltage” graph in

Engineering Data

70 Hz

Not provided

Provided

Weld field immunity Not provided

RFI immunity Not provided

Target Present (red LED)

Housing

Sensing face

Cable sheath

ABS/PC

ABS

PVC

Bracket Y92E-A34 included

Prewired

Weight with cable

Enclosure ratings

Approvals

CSA

Ambient operating temperature

Vibration

Shock

UL

NEMA

IEC 144

UL

IP67

—

SCR-NO (E2K-C25MY1)

SCR-NC (E2K-C25MY2)

200 mA

5 mA

See “Leakage Current Characteristics” graph in Engineering Data

2V max.

Listed, File Number E76675

—

–25

°

to 70

°

C (–13

°

to 158

°

F)

Certified, File Number LR45951

10 to 55 Hz, 1.5 mm (0.06 in) double amplitude

Approx. 50 G's

—

—

10Hz

Not provided

—

Output Operation (red LED)

Three-conductor cable, 2 m (6.56 ft) length Two-conductor cable, 2 m (6.56 ft) length

Approx. 200 g (7.0 oz.)

1

1, 4, 12, 13

3

E2K-C E2K-C

Operation

■ OUTPUT CIRCUIT DIAGRAMS AND TIMING CHARTS

DC Switching Types

E2K-C25ME ❑

The dotted line shows a transistor circuit load.

22

Ω

Brown (Red)

4.7 K

Ω

D

2

D

1

Black (White)

Prox.

switch main circuit

2.2

Ω

Tr

ZD

Blue (Black)

+ V

0 V

Note: IEC colors are shown in parentheses.

E2K-C25ME1

NO

Target

Present

Absent

Load (between red and white)

Operates

Releases

Logic (between white and black)

H

Operation indicator

L

ON

OFF

E2K-C25ME2

NC

E2K-C25MF ❑

The dotted line shows a transistor circuit load.

Prox.

switch main circuit

D

2

4.7 K

Ω

ZD

Black (White)

22

Ω

2.2 Ω

D

1

Target

Present

Absent

Load (between white and black)

Operates

Releases

Logic (between red and white)

Operation indicator

H

L

ON

OFF

Brown (Red)

Blue (Black)

E2K-C25MF1

NO

Tr

+ V

0 V

E2K-C25MF2

NC

AC Switching Types

E2K-C25MY ❑

Prox.

switch main circuit

White (Black)

Load

Black (Blue)

Target

Load

Operation indicator

NO

NC

NO

NC

Present

Absent

Operates

Releases

Operates

Releases

ON

OFF

ON

OFF

Note: IEC colors are shown in parentheses.

4

E2K-C

Engineering Data

Operating Range

E2K-C25MY1

Standard target

X

Detecting

30 head

Y 25

Setting distance

25mm

20

20mm

15

15mm

10

10mm

5

5mm

25 20 15 10 5 0 5 10 15 20

25

Detecting head

Y (mm)

Detecting Distance vs. Size and Material of Target

Detecting Distances of Common Materials

30

25

20

Detecting distance

X

❑

Grounded mild steel t = 1 mm

Ungrounded mild steel t = 1 mm

25

20

15

15

10 10

5

Phenolic resin plate t = 6 mm

0

10 20 30 40 50 60 70 80 90 100

Size of target (mm)

5

0

E2K-C

5

E2K-C E2K-C

Residual Load Voltage Characteristics

DC switching types

E2K-C25M ❑❑

24VDC

AC switching types

E2K-C25MY ❑

100 VAC 200 VAC

2.5

2.0

1.5

1

0.5

0.1

0.05

0.01

ON (V

2

)

OFF (V

1

)

24 VDC

0 50 100 150 200 250

Load current (mA)

R

V

S

10 – i

(k

Ω

) P

>

V

S

R

2

(mW) i

P : Power rating of bleeder resistor

V

S

: Load current (mA)

: Supply voltage (V)

Leakage Current Characteristics

AC switching types

E2K-C25MY ❑

3.0

Residual output voltage

100

90

80

70

60

50

40

30

Residual output voltage

Load

ON

AC

100V

20

Residual

10 load voltage OFF

0

1 5 10 50 100 200

Load current (mA)

200

150

ON

100 Load

50

Residual load voltage

OFF

0

1 5 10 50 100 200

AC

200V

Load current (mA)

Note: When the current rating of the load is less than 10 mA, false operation may occur. This is normal, and the problem can be cured by installing a bleeder resistor in parallel with the load. Use the formulas given here to calculate the power rating and value of the resistor.

1.0

0.5

OFF state

0

0 80 100 120 140 160 180 200 220 240

260

Supply voltage (V)

Dimensions

Unit: mm (inch)

■ SENSORS

E2K-C25M ❑❑

34 (1.34) dia.

20

(0.79)

82

(3.23)

31

(1.22)

Cap screw for sensitivity adjustment

6

(0.24)

Operation indicator

(LED)

0.15

(0.006)

Note: Cable may be extended to 200 m (656 ft).

Cable: 2 m (6.56 ft.) length

6

E2K-C

Unit: mm (inch)

■ MOUNTING BRACKET

Y92E-A34 (supplied with sensor)

45 (1.77)

43 (1.69)

5.2 (0.20)

R2.6

(0.102)

6.3 (0.25)

Two elliptic holes for bracket mounting

(0.08)

23.5 (0.93)

35 (1.38)

15 (0.59)

2

42 (1.65)

Two M4 sensor clamping screws

55 (2.16)

Sensor mounting hole

E2K-C proximity sensor

51 (2.01)

30

(1.18)

14

(0.55)

6 (0.24)

45 (1.77)

58 (2.28)

Two 5.5 (0.22) dia. mounting holes

35

(1.38)

Precautions

■ EFFECTS OF SURROUNDING METALS

When mounting the sensor, be sure to provide the minimum distance shown in the diagram. This prevents the sensor from being affected by metallic objects other than the target. Also, when using the supplied mounting bracket, be sure to allow a distance of 20 mm or more between the detecting face and the mounting bracket.

20 (0.79) mm min.

80 (3.15) mm min.

Surrounding conductive object

Detecting face

Metal

To ground

E2K-C

■ MUTUAL INTERFERENCE

To prevent mutual interference, be sure to space the two sensors at a distance greater than that shown in the diagrams.

Opposed mounting

100 (3.94) mm min.

Parallel mounting

100 (3.94) mm min.

80

(3.15) mm min.

80 (3.15) mm min.

80 (3.15) mm min.

Surrounding conductive object

7

E2K-C

■ SENSITIVITY ADJUSTMENT

NO type (E2K-C25M ❑ 1)

Remove protective rubber plug to gain access to sensitivity adjustment screw. Use the screwdriver provided with each sensor to turn the sensitivity adjustment screw.

1) Remove any targets from in front of the sensor. Turn the sensitivity adjustment screw CLOCKWISE until the sensor turns ON and the indicator illuminates.

Sensitivity adjustment

Stop when the sensor turns ON

2) Place a target in front of the sensor. Turn the sensitivity adjustment screw COUNTERCLOCKWISE until the sensor turns OFF and the indicator goes out. Note the number of revolutions between OFF and ON positions.

Sensitivity adjustment

Stop when the sensor turns OFF

3) If the number of revolutions is greater than one and a half, the sensor will provide stable output. If the number of revolutions is less than one and a half, increase or decrease the distance between the target and the sensing face as necessary to allow at least one and a half revolutions between the ON and OFF positions.

1

ON point

Stable operation if the difference is more than 1.5 turns

2

4) Now turn the sensitivity adjustment screw CLOCKWISE to the midpoint between the ON and OFF points.

1 ON point

1

Set at midpoint between ON and

OFF points

2 OFF point

5) If the distance between the target and the sensor is not constant, perform the first adjustment operation (#1) when the target is at the closest position to the sensor. Then perform the second adjustment operation (#2) when the target is at the farthest position from the sensor.

NC type (E2K-C25M ❑ 2)

The sensitivity adjustment procedure for NC type proximity sensors is the same as for NO type sensors, with the exception that ON and OFF operations of the proximity sensor and ON and OFF points in the adjustment procedure are exactly reversed.

E2K-C

■ USING METAL CONDUIT

If a high voltage of power line runs near the proximity sensor cable, be sure to wire the sensor cable through a metal conduit to protect the sensor from malfunctioning or damage.

■ SURGE PROTECTION

The proximity sensor is provided with a surge suppressor circuit. However, if any large surge generating source (i.e., motor, welding machine, etc.) exists in the vicinity of the proximity sensor, insert a surge suppressor (such as a varistor) into the surge generating source.

8

E2K-C E2K-C

OMRON ELECTRONICS LLC

One East Commerce Drive

Schaumburg, IL 60173

1-800-55-OMRON

Cat. No. CEDSAX4 11/01

OMRON ON-LINE

Global - http://www.omron.com

USA - http://www.omron.com/oei

Canada - http://www.omron.com/oci

Specifications subject to change without notice.

OMRON CANADA, INC.

885 Milner Avenue

Scarborough, Ontario M1B 5V8

416-286-6465

Printed in the U.S.A.