E3JU
PHOTOELECTRIC SENSOR
Instruction Sheet
Thank you for purchasing this
OMRON product. Please read this
instruction sheet and thoroughly
familiarize yourself with the
functions and characteristics of the
product before use. Please retain
this sheet for future reference.
1997 OMRON All rights reserved.
PROTECTIVE COVER CARE
Cover Screw: The torque of the
cover screw must not exceed
3.5 kg-cm (3 in-lb). Over-torquing
will cause the plastic parts to crack.
WARNING
These photoelectric sensors should
not be used in personal safety
applications. Using the sensor as a
safety device may cause an unsafe
condition that could lead to serious
injury or death.
OMRON
EMA0008-B
SPECIFICATIONS
CIRCUIT DIAGRAMS
CONNECTION
OPERATION PANEL LAYOUT
Part number
E3JU-25
4 -
E3JU-R5
4 -
E3JU-D1
4 -
E3JU-D2
4 -
E3JU-R5M1-MN1
Method of detection
Through-beam type
Polarized retroreflective
Diffuse reflective
Diffuse reflective
Polarized retroreflective
Supply voltage
24 to 240 VAC
10%, 50/60 Hz; 12 to 240 VDC, 10% max peak-to-peak ripple
Power consumption
Emit: 2 W max, Rec: 3.5 W max 3.5 W max
4.0 W max
4.0 W max
2.5 W max
Sensing distance / Target
25 m (82 ft)
5 m (16.4 ft) / E39-R1 reflector
1 m (3.3 ft) / 20 cm
2
(7.9 in
2
)
2 m (6.6 ft) / 30 cm
2
(11.8 in
2
)
5 m (16.4 ft) / E39-R1 reflector
(supplied)
(Kodak gray card white side 90% reflective)
(supplied)
Light source
Infrared LED, 950 nm
Polarized red LED, 660 nm
Infrared LED, 950 nm
Infrared LED, 950 nm
Polarized red LED, 660 nm
Detectable object type, size (min)
Opaque, 16 mm (0.63 in)
Opaque, 56 mm (2.2 in)
Opaque and translucent
Opaque and translucent
Opaque, 56 mm (2.2 in)
Operation mode
Light-ON / Dark-ON, switch selectable
Light-ON only
Sensitivity
Adjustable
Not adjustable
Mutual interference protection
Not provided
Provided
Control output Contact
Type
SPDT relay
Max load
3 A, 250 VAC, 30 VDC rated (p.f. =1)
Min load
10 mA, 5 VDC minimum
Response
Models w/o timer and timer models set to No Timer: 12 ms On (6 ms typ.), 12 ms Off (5 ms typ.); Models with timer: 0.1 to 10 sec (adjustable)
Solid state
Type
Power MOSFET relay
Not provided
Max load
400 mA AC/DC (600 mA up to 40
C), 240 VAC, 100 VDC rated
Response
Models w/o timer and timer models set to No Timer: 8 ms On, 12 ms Off max; Models with timer: 0.1 to 10 sec (adjustable)
Timer Functions (models w/ timer)
On-delay, off-delay, on/off delay, one-shot retrigger or non-retrigger, delayed one-shot retrigger or non-retrigger; switch selectable
Not provided
Output short-circuit protection
Not provided
Indicators
Light incident (red LED), output operation (yellow LED), stability (green LED)
Materials
Lens: PMMA; case: ABS/PC; cover: PC
Mounting
Two M5 front-mounting through holes. M30 externally threaded base. 1/2-14 NPSM internal threads accessible for cable type; conduit torque not to exceed 100 in-lbs
Connections
Pre-wired
(-6) 600 V rated, AWG20: 2, 4 wire cables, AWG21: 5 wire cables or (-3) 300 V rated, AWG22: 4, 5 wire cables
Not provided
Connector
Mini-change type connector: 2, 4,and 5 pins
Mini-change 5 pins
Weight
Emitter
(-6): 260 g, (-3): 180 g,
(-6): 300 g, (-3): 220 g, (-MN1): 130 g
(-3): 235 g, (-6): 315 g,
(-MN1): 130 g
(-MN1): 115 g
(-MN1): 145 g
Receiver
(-6): 300 g, (-3): 220 g,
(-MN1): 130 g
Enclosure ratings
UL type 1; NEMA 1, 2, 3, 4X, 5, 12; IEC 144: IP67
Approvals
UL, CSA, CE UL listed: E41515; CSA certified: LR45951; CE: IEC947-5-2
Ambient temperature
Operating: -25
to 55
C (-13
to 131
F); storage: -40
to 70
C (-40
to 158
F)
Main
circuit
Power
supply
COM
NO
NC
Relay output
24 to 240 VAC
12 to 240 VDC
(50/60 Hz AC)
Either polarity
250 VAC, 3 A rated
5 VDC, 10 mA min.
Main
circuit
Load*
Power
supply
Load*
Power
supply
24 to 240 VAC
12 to 240 VDC
(50/60 Hz AC)
Either polarity
0.1 to 400 mA
* Load can be hooked up on either
side of the power supply.
Line voltage
5 to 240 VAC
5 to 100 VDC
Either polarity
Optically
isolated
Relay output types
E3JU-
M
-
Solid state relay output types
E3JU-
P
-
Pre-wired types:
Connector types:
Through-beam emitter types:
E3JU-25L-3
E3JU-25L-6
Through-beam emitter type:
E3JU-25L-MN1
Brown
Blue
Power
24 to 240 VAC
12 to 240 VDC
Relay output types:
E3JU-
M
-3
E3JU-
M
-6
Relay output type:
E3JU-
M
-MN1
Solid state relay output types: E3JU-
P
-3
E3JU-
P
-6
Solid state relay output type:
E3JU-
P
-MN1
Brown
Blue
COM
NO
NC
Power
24 to 240 VAC
12 to 240 VDC
Gray
Black
White
Power
Brown
Blue
Power
White
Load
Black
24 to 240 VAC
12 to 240 VDC
Load*
Power
2
1
24 to 240 VAC
12 to 240 VDC
COM
NO
NC
Power
2
1
5
4
3
24 to 240 VAC
12 to 240 VDC
Power
2
1
4
3
24 to 240 VAC
12 to 240 VDC
Load
Power
Load*
Sensor without timer
E3JU-
4-
Sensor with timer
E3JU-
4T-
Sensor without timer
E3JU-R5M1-MN1
* Load can be hooked up on
either side of the power supply
TIMING CHART
SUGGESTED USE
DIMENSIONS
SENSITIVITY ADJUSTMENT (DIFFUSE REFLECTIVE SENSORS)
Wiring
Separating the sensor line from inductive or noisy
power lines is recommended.
Output Protection Circuit
The protection circuit below increases reliability
by protecting the sensor output from surge or
noise.
By utilizing the constant-voltage characteristic of a
surge absorber, this circuit prevents high voltages
from being applied across the contacts.
This circuit, if connected across the load, is effective
when the supply voltage is 24 to 48 V. If the supply
voltage is 100 to 240 V, connect the circuit across the
contacts.
Employ a diode having a reverse breakdown voltage
of more than 10 times the circuit voltage and a
forward current rating greater than the load current.
A diode having a reverse breakdown voltage two to
three times that of the supply voltage can be used in
an electronic circuit where the circuit voltage is not
particularly high.
Inductive load
(motor, lamp,
solenoid)
AC Power Source
Surge
absorbers
DC Power Source
Inductive load
(motor, lamp,
solenoid)
Diode
E3JU-[R5, 25, D1]
-
Unit: mm(in)
E3JU-D2
-
Unit: mm(in)
SENSITIVITY ADJUSTMENT (DIFFUSE REFLECTIVE SENSORS)
Step/Function
Step 1: Determine position A
Step 2: Determine position B
Step 3: Adjust to optimum setting
Sensing condition
Sensitivity adjuster
Indicators
Procedure
Photoelectric sensor
Background
Target
Photoelectric sensor
Target
Background
Photoelectric sensor
Target
Background
A
(Position A: designates the
point at which the LED has
turned ON.)
Min
Max
(Position B: designates the
point at which the LED has
turned OFF.)
B
Min
Max
(In some cases, positions A
and B are opposite of this
example.)
B
A
Min
Max
ON
LIGHT Incident
Indicator (red)
OFF
LIGHT Incident
Indicator (red)
OFF
LIGHT Incident
Indicator (red)
Place target at the desired sensing distance. Set
sensitivity adjuster to the minimum scale position and
gradually increase sensitivity by turning the sensitivity
adjuster clockwise until the Light Incident Indicator (red
LED) turns ON (see Position A).
Remove the target. Starting from the maximum scale
position, gradually decrease sensitivity by turning the
sensitivity adjuster counterclockwise until the Light
Incident Indicator (red LED) turns OFF (see Position B).
Set the sensitivity indicator to the position between
Positions A and B. NOTE: To ensure stable sensor
operation, green stability indicator should be fully ON in
both the sensing and non-sensing condition.
PDF 
ZIP