E3S-CL - Proximity sensor OMRON - Free user manual and instructions

Product Type	Distance-adjustable photoelectric proximity sensor
Brand	OMRON
Model	E3S-CL1 / E3S-CL2
Category	Industrial proximity sensor
Detection range	E3S-CL1: 5 to 200 mm (white paper 200x200 mm); E3S-CL2: 5 to 500 mm
Light source	E3S-CL1: Red LED (700 nm); E3S-CL2: Infrared LED (860 nm)
Supply voltage	10 to 30 VDC (including 10% ripple)
Power consumption	E3S-CL1: 35 mA max; E3S-CL2: 50 mA max
Output type	Selectable NPN/PNP open collector, selectable Light-ON/Dark-ON
Response time	E3S-CL1: 1 ms max; E3S-CL2: 2 ms max
Hysteresis	E3S-CL1: 2% max; E3S-CL2: 10% max of detection distance
Black/white error	E3S-CL1: 2% max; E3S-CL2: 10% max
Protection degree	IP67 (IEC), NEMA 6P (indoor)
Operating temperature	-25°C to 55°C (no freezing or condensation)
Operating humidity	35% to 85% RH (no condensation)
Housing material	Die-cast zinc (zamak)
Lens material	Acrylic
Weight (packed)	Approx. 170 g
Cable length	2 m (pre-wired)
Supplied accessories	Mounting bracket, M4x12 screws, adjustment screwdriver, instruction manual
Special functions	6-turn distance adjustment with indicator, NPN/PNP selection, Light-ON/Dark-ON, reverse polarity protection, short-circuit protection, mutual interference prevention
Compliance	CE (IEC947-5-2, EN50081-2, EN55011)

Frequently Asked Questions - E3S-CL OMRON

How to adjust the detection distance on the E3S-CL?

Use the 6-turn distance adjuster located on the control panel. Turn clockwise to increase the distance, counterclockwise to decrease. The distance indicator shows the number of turns. Follow the adjustment procedure in the manual: place the object, adjust until the orange indicator lights up, then remove the object and adjust again if necessary. Ensure the green stability indicator is lit with and without an object.

How to select NPN or PNP output?

The sensor has an output selector switch on the control panel. For NPN output, set the switch to NPN; for PNP, set to PNP. The corresponding wiring diagram is provided in the manual.

What is the difference between the E3S-CL1 and E3S-CL2 models?

The E3S-CL1 uses a red LED (700 nm) with a range of 5 to 200 mm and a hysteresis of 2% max. The E3S-CL2 uses an infrared LED (860 nm) with a range of 5 to 500 mm and a hysteresis of 10% max. The E3S-CL2 offers better resistance to oils and detergents.

How to configure Light-ON or Dark-ON mode?

Use the mode selector switch on the panel. Position L-ON for Light-ON (output active when light is incident), position D-ON for Dark-ON (output active when light is interrupted). Refer to the corresponding wiring diagram.

What are the recommended installation conditions?

Install the sensor so that its detection surface is parallel to the object. For reflective surfaces, tilt the sensor by 5 to 10 degrees. Avoid direct sunlight or strong lamps. Use M4 screws with a maximum tightening torque of 1.2 Nm. Do not strike the sensor during installation.

How to clean the E3S-CL sensor?

Clean the lens with a soft, dry cloth. Do not use aggressive solvents. For oil-resistant E3S-CL2 models, you can use the oils and detergents listed in the manual, but check compatibility beforehand.

What are the indicator lights and what do they mean?

The orange (operation) indicator lights up when the output is active. The green (stability) indicator indicates sufficient detection margin. During adjustment, these indicators help position the distance adjuster.

Is the sensor resistant to water and oils?

Yes, the protection degree is IP67, ensuring water tightness against temporary immersion. The E3S-CL2 is specifically tested to resist common oils and detergents (see list in manual). Outdoor use is not recommended.

What is the adjustment procedure for stable detection?

1) Place the object at the desired position and turn the adjuster until the orange indicator lights up (point A). 2) Remove the object; if there is a background, turn until the orange indicator lights up (point B), then back off until it turns off (point C); otherwise, use the Max position as C. 3) Position the adjuster midway between A and C. Verify that the green indicator is lit with and without an object.

What to do in case of malfunction or defect?

First check the power supply and wiring. Make sure the switches are in the correct position. If the sensor does not detect properly, redo the distance adjustment. In case of a short circuit, the built-in protection cuts the output; disconnect and reconnect the power to reset. If the problem persists, contact OMRON technical support.

USER MANUAL E3S-CL OMRON

Distance setting photoelectric sensor in metal housing

E3S-CL

• High water, oil and detergent resistance
• Minimal black/white error for highest reliability detecting different colored objects (E3S-CL1)

Features

Eliminates Background Influences with a Hysteresis of Only 2% max. (E3S-CL1)

The hysteresis is the industry's minimum 2% max. (E3S-CL1). As a triangulation measuring is used, objects behind the setting distance cannot be detected. The sensor is insensitive to the influence of background objects of high reflectivity, and stable detects works on a conveyor from above. The hysteresis of the E3S-CL2 is 10% max. of the detecting distance ( 5% max. for white paper).

What Is Distance Setting?

(Differences from other detecting system)

Distance-setting

Fea-tures

When the sensing object moves in direction A, the center position of the reflected light moves in direction B. This is received by the 2-split photodiode and the place where the incident levels are the same on the N and F sides is defined as the setting distance. The object is detected by the incident circuit processing only when N F, and is not detected when N F. Therefore, detection is stable without being influenced by the work type and background objects.

Struc-ture

Received element (Two division photodiode) N: Near F: Far A setting distance variable Light source LED Setting range ← Detecting range → A

Diffuse-reflective

Fea-tures	Since the level of the reflected light is judged for detection, the sensing distance varies with the color, material and/or size of the work. A malfunction may occur if there is any object of high reflectivity in the background.
Struc-ture	Received element Light source LED Detecting area ←→ Detecting range

6-turn adjuster with indicator

• The 6-turn adjuster with indicator ensures ease of distance setting.
• Fine distance setting is possible.

Optical Technology of E3S-CL

By turning the distance setting adjuster (worm gear), the rotation of the gear moves the cam to change the incident angle of the whole incident block (lens and photodiode), setting the distance.

• NPN/PNP Output Selectable.
  Light-ON/Dark-ON is also switch selectable.

Conforms to Applicable EN/IEC Standards

• The sensors satisfy the electrical safety (IEC947-5-2), noise resistance (IEC947-5-2, IEC801-2/3/4) and noise radiation restrictions (EN500 81-2, EN55011) required for photoelectric sensors.

Application

E3S-CL1

E3S-CL2

Red light Infrared light

Shape	Sensing/Setting range	Model
	5 Min. setting 40mm Setting range 40 to 200 mm Max. setting 5 to 200 mm	E3S-CL1
	5 Min. setting 50mm Setting range 50 to 500 mm Max. setting 5 to 500 mm	E3S-CL2

Rating/performance

Sensing method Item	Model	Distance-setting
		E3S-CL1	E3S-CL2
Sensing		5 to 200 mm (White paper 200 x 200 mm) (Setting distance 200 mm)	5 to 500 mm (White paper 200 x 200 mm) (Setting distance 500 mm)
Setting range		40 to 200 mm (White paper 200 x 200 mm)	50 to 500 mm (White paper 200 x 200 mm)
Differential distance		2% max.	10% max.
Reflectivity characteristics (black/white error)	*1	2% max.	10% max.
Light source (wave length)		Red LED (700 nm)	Infrared LED (860 nm)
Power supply voltage		10 to 30 VDC [ripple (p-p) 10% included]
Current consumption		35 mA max.	50 mA max.
Control output		Load supply voltage 30 VDC max., load current 100 mA max. (residual voltage NPN output: 1.2 V max., PNP output: 2.0 V max.) Open collector output type (NPN/PNP switch selectable) Light-ON/Dark-ON switch selectable
Protective circuits		Reverse polarity protection, output short-circuit protection, mutual interference prevention
Response time		Operation or reset: 1 ms max.	Operation or reset: 2 ms max.
Distance setting		6-turn endless adjuster (with indicator)
Ambient illuminance		Incandescent lamp: 5,000 lux max. Sunlight 10,000 lux max.
Ambient temperature		Operating/Storage: -25°C to 55°C (with no icing or condensation)
Ambient humidity		Operating/Storage: 35% to 85%RH (with no condensation)
Insulation resistance		20 M min. at 500 VDC
Dielectric strength		1,000 VAC at 50/60 Hz for 1 minute
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/s² for 3 times each in X, Y, and Z directions
Protective structure		IEC Standard IP67, NEMA 6P (limited to indoor use)*2	IEC Standard IP67, NEMA 6P (limited to indoor use)
Connection method		Pre-wired models (standard length: 2 m)
Weight (Packed state)		Approx. 170 g
Ma-terial	Case	Zinc diecast
	Operation panel cover	Polyethyl sulfon
	Lens	Acrylics
	Mounting Brackets	Stainless steel (SUS304)
Accessories		Mounting bracket, hexagon bolt M4 x 12 (with spring washer, flat washer), adjusting screwdriver, instruction manual

1. Sensing distance difference between standard white paper (reflectivity 90%) and standard black paper (reflectivity 5%)
2. NEMA (National Electrical Manufacturers Association) Standards

Spot Diameter vs. Sensing Distance
E3S-CL1

E3S-CL2

Short distance characteristic
E3S-CL1

E3S-CL2

Output Circuit Diagram

NPN output

Model	Operating status of output transistor	Timing chart	Mode selec-tion switch	Output circuit
E3S-CL1 E3S-CL2	Light ON	Incident Interrupted Operation indicator (orange) ON OFF Output transistor Load Operate (Relay) Reset	L ON (LIGHT ON)	Brown 10 to 30 VDC Load Load current Black Control output NPN and PNP output selector NPN output transistor ZD Blue 0V * Please make a changeover switch into the NPN side.
	Dark ON	Incident Interrupted Operation indicator (orange) ON OFF Output transistor Load Operate (Relay) Reset	D ON (DARK ON)

PNP output

Model	Operating status of output transistor	Timing chart	Mode selec-tion switch	Output circuit
E3S-CL1 E3S-CL2	Light ON	Incident Interrupted Operation indicator (orange) OFF Output transistor Load Operate (Relay) Reset	L ON (LIGHT ON)	Brown 10 to 30 VDC Operation indicator Stability indicator Main circuit NPN and PNP output transistor ZD Black Load current Load Control output Blue 0V * Please make a changeover switch into the PNP side.
	Dark ON	Incident Interrupted Operation indicator (orange) OFF Output transistor Load Operate (Relay) Reset	D ON (DARK ON)

Nomenclature:

Operation panel

Output selection switch

① When using the sensor with NPN output, move the switch to the NPN position.
② When using the sensor with PNP output, move the switch to the PNP position.

Mode selection switch

① When using the sensor with Light-ON, move the switch to the L-ON position.
② When using the sensor with Dark-ON, move the switch to the D-ON position.

Distance Adjuster

① Turning the distance setting adjuster clockwise (to the Max position) increases the detecting distance, and turning it counterclockwise (to the Min position) decreases the distance.
(2) The distance setting adjuster is a 6-turn endless adjuster ranging from the Min position to the Max position, and its number of turns is displayed on the setting distance indicator according to the rotation of the adjuster.

Sensitivity adjustment (distance setting type, Light-ON)

Sequence	Detection state	Position of dis-tance setting ad-juster	State of setting dis-tance indicator	Indicator state	Adjustment Steps
(1) Point (A)	Photoelectric SensorSensing object	(A)Min Max	(A)134	ON→OFFOFF→ONStability indicator (green)Operation indicator (orange)	Place a sensing object in the predetermined position, turn the adjuster clockwise until the incident indicator (orange) is turned ON, and define this position as (A).
(2) Points (B),(C)	Photoelectric SensorSensing object	(B)CMax	(C)354	ON→OFFON→OFFStability indicator (green)Operation indicator (orange)	(1) If there is a background object, remove the sensing object, turn the adjuster further clockwise until the incident indicator (orange) is turned ON, and define this position as (B). Turn the adjuster counterclock-wise from (B) until the incident indicator (orange) is turned OFF, and define this position as (C). (2) If there is no background object, define the maximum adjuster position (Max) as (C).
(3) Setting	---	(A)Min CMax	(A)134(C)54	ONON←OFFStability indicator (green)Operation indicator (orange)	Set the adjuster in the middle of positions (A) and (C). Also make sure that the stability indicator (green) is turned ON when there is an object and when there is no object. When the indicator is not turned ON, reexamine the detection method since there is a little allowance.

Precautions

Correct Use

Design

Cable

The oil-resistant cable is used to ensure oil resistance.

(E3S-CL2)

Installation

Sensor installation

Mounting orientation

• Install the photoelectric sensor in such manner that its detection surface and the object surface are parallel (without inclination relative to the sensing object).

If the sensing object has a glossy surface, incline the Sensor by 5^ to 10^ as shown on the right. In this case, ensure that the Sensor is not influenced by any background objects.

• If there is a mirror-smooth object under the photoelectric sensor, operation may become instable. Therefore, incline the photoelectric sensor as shown below or move it away from the object.

• Install the photoelectric sensor in either of the following orientations, being careful of the direction in which the sensing object will move.

• Also, when the color/material of the sensing object varies extremely, install the photoelectric sensor in either of the following orientations.

• Install the photoelectric sensor so that the sun, fluorescent lamp, incandescent lamp or any other strong light will not enter the directional angle range of the sensor.

Mounting Precautions

• Do not strike the Photoelectric Sensor with a hammer or any other tool during the installation of the Sensor, or the Sensor will loose its water-resistive properties.
• Use M4 screws.
• Tighten the screws to the torque of 1.2 Nm max.

Others

Oil resistance/chemical resistance (E3S-CL2)

For the oil resistance of E3S-CL2, the Sensor has passed tests on the oils given in the following table. Refer to the table for examining the oil to be used. Depending on the oil type, however, the Sensor may not be able to exhibit its performance.

Testing oil classificatio	JIS classificatio	Product name	Dynamic vis-cosity (mm2/s) at 40°C	PH
Lubricant	---	Velocity No. 3	2.02	---
Water-in-solublecoolant	Class 2No. 5	Daphne Cut	Not less than10 to less than50
	Class 2No. 11	Yushiron Oil No. 2ac	Less than 10
Water-solublecoolant	Class W1No. 1	Yushiroken EC50T-3	---	7'9.5
		Yushiron Lubic HWC68		7'9.9
	Class W1No. 2	Gryton 1700D		7'9.2
	Class W2No. 1	Yushiroken S50N		7'9.8

Note: 1. E3S-C was submerged in the oils in the above table at 50^ for 240
hours, and passed the test of 100-M or more insulation resistance.
2. For use in the environment where E3S-C is exposed to the oil other than those in the above table, use the dynamic viscosity and PH in the above table. Pre-check the oils since the sensor may be affected by additives etc. in the oils.

Dimensions (Unit: mm)

E3S-CL1

E3S-CL2

With Mounting Bracket Attached

E3S-CL1: Vinyl-insulated round cable of 4 dia. 3 cores conductor cross-sectional area: 0.2mm^2 insulation diameter: 1.1mm Standard length: 2m
E3S-CL2: Vinyl-insulated round cable of 4 dia.
3 cores conductor cross-sectional area: 0.2mm^2 ; insulation diameter: 1.1mm Standard length: 2m

Note: The output selector, mode selector and distance setting adjuster are exposed when the cover is opened.

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. E237-E2-02A-X

In the interest of product improvement, specifications are subject to change without notice.