E3L

Prewired DC Sensor Provides Long-
Distance Sensing of Objects as Small
as 0.1 mm

Detect small objects over longer sensing
distances with highly accurate positioning

Attachable apertures allow detection down
to 0.1 mm diameter

Alarm output signals deteriorating detec-
tion conditions due to improper alignment
or dust contamination

Class I (FDA/IEC) laser product E3L-50,
requires no additional protective equip-
ment

Visible spot through-beam version aids in
critical alignment applications

Ordering Information

Method of detection

Through-beam

Diffuse reflective

Sensing distance

10 m (32.8 ft)

2 m (6.56 ft)

20 to 50 cm
(7.9 to 19.7 in)

Light source

Visible red

Infrared

Laser class

Class II

Class I

Part number

NPN output

E3L-2RC4

E3L-2E4-50

E3L-DS50E4-50

PNP output

E3L-2B4-50

SENSORS

Laser Photoelectric Sensor

E3L

Description

Part number

Mounting bracket

For through-beam type; supplied with E3L-2 4- 50, E3L-2RC4

E39-L6

For diffuse reflective type; supplied with E3L-DS50E4-50

E39-L5

Sensitivity adjuster knob

E39-G1

Aperture with 0.85 mm dia. opening

E39-S56

Aperture with 0.10 mm dia. opening

E39-S55

REPLACEMENT PARTS

Apertures for
through-beam types

E3L

Specifications

Part number

E3L-2RC4 (See Note.)

E3L-2 4-50

E3L-DS50E4-50

Method of detection

Through-beam type

Diffuse reflective

Supply voltage

12 to 24 VDC,

10% max. ripple peak-to-peak

Current consumption

50 mA max.

40 mA max.

Sensing distance

10 m (32.8 ft) with no

2 m (6.56 ft) with 0.85 mm

20 to 50 cm (7.9 to 19.7 in)

aperture; 9 m (29.52 ft) with

dia. aperture; 20 cm (7.9 in)

with 2 x 2 mm (0.09 x 0.09 in)

3 mm aperture; 6 m (19.68 ft)

with 0.1 mm dia. aperture

white mat paper

with 2 mm aperture; 3 m
(9.84 ft) with 1 mm aperture;
2 m (6.56 ft) with 0.85 mm
aperture; 1 m (3.28 ft) with
0.5 mm aperture; 30 cm
(11.81 in) with 0.1 mm
aperture

Light source

Visible red, pulse modulated

Infrared, pulse modulated laser diode (

=780 nm) 25

laser diode (

=670 nm)

max., Class I FDA/IEC

480

W max.,

Class II FDA/IEC

Detectable object type

4 mm (0.16 in) dia. object

0.5 mm (0.02 in) dia. object

Opaque, translucent objects

minimum without aperture;

minimum with 0.85 mm dia.

2 x 2 mm

With aperture - object

aperture 0.1 mm (0.003 in)

minimum is same as

dia. object minimum with

aperture size

0.10 mm dia. aperture

Diameter of projected spot

With 4 mm dia. emitter, no aperture, at a distance of

With 4 mm dia. emitter, at a

2 m (6.56 ft), the incident light is 20 mm (0.79 in) in diameter

distance of 50 cm (19.7 in)
from the emitter, the incident
light is 2 mm (0.08 in) in dia.

Directional angle

Emitter: 2

max., Receiver: 20

max.

Operation mode

Light-ON/Dark-ON, wire selectable
Light-ON: + red, - black; Dark-ON: - red, + black

Sensitivity adjustment

Adjustable

Mutual interference protection

Standard level

Control

Type

NPN type, open collector

NPN type, constant current source (E3L-

E4-50)

output

PNP type, open collector (E3L-2B4-50)

Max. load

NPN type: 100 mA max.

NPN type: Load (relay, sink) logic: 80 mA max.
Voltage (source) logic: 1.5 to 3 mA
PNP type: Load (relay, source) logic: 80 mA max.

Response time

1 ms max. (both ON and OFF)

3 ms max. (both ON and OFF)

Type

NPN (E3L-

E4-50); PNP (E3L-2B4-50)

Max. load

50 mA, 24 VDC

Residual voltage

1 V

Response time

Output turns ON after 100 ms delay when light receiving signal level is within unstabe
zone.

Circuit

Output short-

Provided

protection

circuit

DC power supply

Provided

reverse polarity

Indicators

Light Incident (red LED), Stable Operation (green LED)

Materials

Lens

Plastic, PMMA

Case

Diecast zinc

DC
solid-
state

Alarm
output

(This table continues on the next page)

Note: In consideration of vibration and other environmental and mounting conditions, the sensing distance values for the E3L-2RC4 are
very conservative. If these conditions can be minimized, longer sensing distances are possible. Please see excess gain and operating
range curves for more accurate sensing ranges.

E3L

Part number

E3L-2RC4

E3L-2 4-50

E3L-DS50E4-50

Mounting

Two side mount M4 threaded holes or

Two side mount M4 threaded

mounting bracket E39-L6 (supplied)

holes or mounting bracket
E39-L5 (supplied)

Connections

Prewired

2 m (6.56 ft); 3 conductor

2 m (6.56 ft) 4 conductor

cable for emitter, 3

cable for emitter, 4

cable

conductor cable for receiver

conductor cable for
receiver

Weight

Emitter: 160 g (5.6 oz)

250 g (8.8 oz)

Receiver: 175 g (6.2 oz)

Enclosure

NEMA

NEMA 4

IEC 144

IP67

Ambient

Operating

-10

C to 50

C (14

F to 122

F) with no icing

Storage

-30

C to 70

C (-22

F to 158

Specifications Table - continued from previous page

OUTPUT CIRCUIT DIAGRAMS

Sensor

Through-beam

Diffuse reflective

* Alarm (orange) wire not present for E3L-2RC4

The indicator can be wired for Light Incident by connecting the black
wires together as shown in the dotted line. For Power indication, connect
the emitter's black wire to the receiver's blue wire.

The indicator can be wired for Light Incident by connecting the black
wires together as shown in the dotted line. For Power indication, connect
the emitter's black wire to the receiver's brown wire.

NPN
output
type

PNP
output
type

TIMING CHARTS

(between brown

and black)

(between blue

and black)

(between blue

and black)

(between brown

and black)

E3L

EXCESS GAIN

Through-beam Type E3L-2 4-50

Through-beam Type E3L-2RC4

Diffuse Reflective Type
E3L-DS50E4-50

Through-beam Type E3L-2 4-50
without aperture

Through-beam Type E3L-2 4-50
with 0.85 mm diameter aperture

Through-beam Type E3L-2 4-50
with 0.1 mm diameter aperture

OPERATING RANGE

Diffuse Reflective Type
E3L-DS50E4-50

Through-beam Type E3L-2RC4
without aperture

Through-beam Type E3L-2RC4
with 1.0 mm diameter aperture

Excess gain ratio

Sensing distance (cm)

Excess gain ratio

Sensing distance (m)

Excess gain ratio

Sensing distance (cm)

Parallel of

fset distance

(mm)

Sensing distance X (cm)

Parallel of

fset distance

(mm)

Sensing distance X (cm)

Parallel of

fset distance

(mm)

Sensing distance X (cm)

Parallel of

fset distance

(mm)

Sensing distance X (cm)

with 2 x 2 mm
white mat paper

Parallel of

fset distance

(mm)

Sensing distance X (m)

Parallel of

fset distance

(mm)

Sensing distance X (m)

Slit 0.5, 1, 2, 3 mm dia.

Slit 0.85 mm dia.

Slit 0.1 mm dia.

E3L

Through-beam Type E3L-2RC4
with 0.85 mm diameter aperture

Through-beam Type E3L-2RC4
with 0.5 mm diameter aperture

Through-beam Type E3L-2RC4
with 0.1 mm diameter aperture

Dimensions

Unit: mm (inch)

THROUGH-BEAM TYPE E3L-2 4-

Mounting holes

Cable
2 m length

Sensitivity adjuster

Indicators
(for receiver only)

Lens
diameter

Mounting bracket
E39-L6 supplied

Two M4
hexagonal bolts

22.2

Note: Mounting bracket E39-L6
can be attached to surface "A".

Parallel of

fset distance

(mm)

Sensing distance X (m)

Parallel of

fset distance

(mm)

Sensing distance X (m)

Parallel of

fset distance

(mm)

Sensing distance X (m)

E3L

Operation

LIGHT INCIDENT INDICATOR

The LIGHT incident indicator (red LED) illuminates when the
light from the emitter is incident on the receiver and exceeds
the operating level (trigger point) of the sensor. This indicator
illuminates whenever the object is absent for through-beam
type and when the object is present for diffuse reflective type.

Stability indicator
(green LED)

Light incident indicator
(red LED)

STABILITY INDICATOR

The STABILITY indicator (green LED) illuminates when the
control output is in a stable OFF or ON state. A "stable" state
occurs when the receiver element of the sensor receives less
than 80% (OFF state) or more than 120% (ON state) of
incident light needed to operate the sensor.

The control output STABILITY indicator goes off every time the
amount of light incident on the receiver is within 20% of the
amount of light needed to change the control output state.

The unstable control output condition may occur when the
sensor encounters the leading and trailing edges of the object
to be detected. However, the alarm output described later will
not operate if the unstable condition recovers within 100 ms.
The condition can occur when a change in sensor position,
atmosphere (dust contamination), temperature or ambient light
causes the light incident on the receiving element to be near
the operating level of the sensor.

ALARM OUTPUT (-50 models)

The alarm output operates when the control
output is in an unstable OFF or ON state for
more than 100 ms. An unstable state occurs
when the amount of light incident upon the
receiver is within 20% of the amount of light
needed to change the control output state.

The alarm output feature indicates gradual
degradation of stability caused by changes in
sensor position, atmosphere, temperature or
ambient light that will eventually result in an
unstable control output. A change that occurs in
less than 100 ms will not cause the alarm
output to operate.

A 100 ms time delay is built into the alarm
output circuit. This prevents false triggering of
the alarm output as the leading and trailing
edges of the object to be detected are sensed.
When sensing objects moving at low speeds, a
separate ON-delay timer should be used to
prevent false triggering of the alarm output.

E3L

Precautions

STATIC ELECTRICITY

When handling the device, special care should be taken to avoid static electricity, as any static discharge can damage the laser diode
element of E3L photoelectric sensor.

LASER REGULATIONS

The E3L laser photoelectric sensor is intended for use as an
element incorporated into a larger system.

The E3L laser photoelectric sensor meets the standards
required by the Food and Drug Administration (FDA) in the
United States. OMRON has had also reported to the Center
for Devices and Radiological Health (CDRH). The report
includes the condition that the unit is to be used as a part of a
larger system.

Labels (FDA Regulations)

For products sold in North America, attach the following FDA
safety labels for the appropriate sensor body proir to use.
Some or all of these labels may already be attached.

Caution Label

E3l-2RC4

Certification and Identification Label

E3L-2L 4-50

E3L-DS50E4-50

E3L-2LRC4

TYPE E3L-2L

E4-50

(Tc=25*C, 25

T: 50

sec ts: 2.5

sec f: 20 kHz

This product complies with 21 CFR 1040.10 and 1040.11
OMRON Corporation
10 TSUCHIDO-CHO, HANAZONO, UKYO-KU, KYOTO 615 JAPAN
MANUFACTURED JAN, 1990

TYPE E3L-DS50E4-50
(Tc=25*C, 25

T: 200

sec ts: 5

sec f: 5 kHz

This product complies with 21 CFR 1040.10 and 1040.11
OMRON Corporation
10 TSUCHIDO-CHO, HANAZONO, UKYO-KU, KYOTO 615 JAPAN
MANUFACTURED JAN, 1990

TYPE E3L-2LRC4
(Tc=25*C, 40

T: 60

sec ts: 5

sec f: 16.7 kHz

This product complies with 21 CFR 1040.10 and 1040.11
OMRON Corporation
KARASUMA NANAJO, SHIMOGYO-KU, KYOTO 600 JAPAN
MANUFACTURED , 1990

Aperture Label for E3L-2LRC4

AVOID
EXPOSURE

LASER

RADIATION IS

EMITTED FROM

THIS APERTURE

Labels (European)

For exports to European countries, attach the appropriate
label shown below to the cable.

E3L-2 4-50 & E3L-DS50E4-50

E3L-2RC4

CLASS I
LASER PRODUCT

LASER RADIATION

DO NOT STARE INTO BEAM

CLASS 2 LASER PRODUCT

Weight:

670 nm

Maximum output:

2 mw (Peak)

Pulse duration:

5 sec

MAINTENANCE

The E3L laser photoelectric sensor contains no user-
serviceable parts. Refer all servicing to an authorized
OMRON agent.

These devices generate Class I or Class II laser radiation.
Avoid looking at the beam for prolonged periods.

Note: For more information on laser safelt and requirements,
please see Omron's Measurement Sensors Catalog.

Do not disassemble the unit. Users expose themselves to
the risk of laser radiation if they disassemsble the device,
or use it for any purpose other than those described in this
data sheet or in the instruction sheet provided with the unit.

Caution

Document Outline

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: E3L-24-50

Document Outline

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: E3L-24-50