Sensing distance3 mm ± 10%6 mm ± 10%11 mm ± 10%20 mm ± 10%
Ambient temp. of
Setting
distance
Differential travel20% max. of sensing distance
Target Ferrous metal (The sensing distance decreases with non-ferrous metal.)
Standard sensing object9 × 9 × 1 mm18 × 18 × 1 mm33 × 33 × 1 mm60 × 60 × 1 mm
Response frequency (See note 1.) 700 Hz350 Hz250 Hz80 Hz
Power supply voltage
(operating voltage range)
Current consumption10 mA max.
Output type
Control output
IndicatorOperation indicator (Yellow LED)
Operation mode
Protection circuits
Ambient air temperatureOperating: −25°C to 70°C, Storage: −25°C to 70°C
Temperature influence
Ambient humidityOperating: 35% to 95%, Storage: 35% to 95%
Voltage influence±1% max. of sensing distance in rated voltage range ±15%
Insulation resistance50 MΩ min. (at 500 VDC) between current-carrying parts and case
Dielectric strength1,000 VAC at 50/60 Hz for 1 min between current-carrying parts and case
Vibration resistance10 to 55 Hz, 1.5-mm double amplitude for 2 hours each in X, Y, and Z directions
Shock resistance
Standards and listings
(See note 2.)
Connection method
Weight
(packed state)
Material
Note 1. The response frequency is an average value. Measurement conditions are as follows: standard sensing object, a distance of twice the
standard sensing object length between sensing objects, and a set distance of half the sensing distance.
2. For USA and Canada: use class 2 circuit only.
−25 to 70°C
Ambient temp. of
−10 to 60°C
Load current 200 mA max. (32 VDC max.)
Residual voltage2 V max. (under load current of 200 mA with cable length of 2 m)
Note 1: With M8 Size Models, there is no output reverse
polarity protection diode.
M12 Connector
Pin Arrangement
(See note 2.)
(See note 1.)
M8 Connector
Pin Arrangement
(3-pin)
Brown
Black
Blue
+V
Load
0 V
NCE2A3-@-@-B2
Sensing
object
(%)
Sensing areaNon-sensing area
1000
Rated
sensing
distance
Proximity
Sensor
ON
Yellow indicator
OFF
ON
Control output
OFF
1
2
4
3
Note 2: Terminal 2 of the M12 connector is not used.
Proximity
Sensor
main
circuits
Note 1: With M8 Size Models, there is no output reverse
polarity protection diode.
M12 Connector
Pin Arrangement
(See note 2.)
1
2
4
3
Note 2: Terminal 4 of the M12 connector is not used.
4
3
1
Brown
Black
(M8 connector: )
(See note 1.)
Blue
M8 Connector
(3-pin)
Pin Arrangement
4
3
1
+V
Load
0 V
E2A3
D-39E2A3
Page 6
DC 3-wire Models
NPN Output
Operation modeModelTiming chartOutput circuit
Sensing
object
(%)
Sensing areaNon-sensing area
1000
Rated
sensing
distance
Proximity
Sensor
Proximity
Sensor
main
circuits
(See note 1.)
Brown
Black
+V
Load
NOE2A3-@-@-C1
NCE2A3-@-@-C2
Sensing
object
(%)
Sensing areaNon-sensing area
1000
Rated
sensing
distance
ON
Yellow indicator
OFF
ON
Control output
OFF
Proximity
Sensor
ON
Yellow indicator
OFF
ON
Control output
OFF
Blue
Note 1: With M8 Size Models, there is no output reverse
polarity protection diode.
Pin Arrangement
4
Pin Arrangement
4
M8 Connector
(3-pin)
4
3
1
(See note 1.)
M8 Connector
(3-pin)
4
3
1
Brown
Load
Black
(M8 connector: )
Blue
M12 Connector
Pin Arrangement
(See note 2.)
1
2
3
Note 2: Terminal 2 of the M12 connector is not used.
Proximity
Sensor
main
circuits
Note 1: With M8 Size Models, there is no output reverse
polarity protection diode.
M12 Connector
Pin Arrangement
(See note 2.)
1
2
3
0 V
+V
0 V
Note 2: Terminal 4 of the M12 connector is not used.
D-40Inductive Sensors
Page 7
Dimensions
ping
)
ping
ping
ping
Note:All units are in millimeters unless otherwise indicated.
Pre-wired Models
E2A3-S08KS03-WP-@@
40
26.8
M8×1
45
Two, clamping nuts
(See note 1.)
Indicator (See note 2.)
2
; Insulator diameter: 1.3 mm),
13
Note 1. 4-dia. vinyl-insulated round cable with 3 conductors (Conduc-
tor cross section: 0.3 mm
Standard length: 2 m
2. Operation indicator (yellow)
E2A3-M12KS06-WP-@@
50.4
34
5.5
17
M12×1
Note 1. 4-dia. vinyl-insulated round cable with 3 conductors (Conduc-
tor cross section: 0.3 mm
12
(See note 1.)
Indicator (See note 2.)
Two, clam
nuts
2
; Insulator diameter: 1.3 mm),
Standard length: 2 m
2. Operation indicator (yellow)
M12 Connector Models
E2A3-M18KS11-WP-@@
59.6
39
24
Note 1. 4-dia. vinyl-insulated round cable with 3 conductors (Conduc-
tor cross section: 0.3 mm
615
M18×1
(See note 1.)
Indicator (See note 2.)
Two, clamping nuts
2
; Insulator diameter: 1.3 mm),
Standard length: 2 m
2. Operation indicator (yellow)
E2A3-M30KS20-WP-@@
64.6
36
M30×1.5
Note 1. 4-dia. vinyl-insulated round cable with 3 conductors (Conduc-
tor cross section: 0.3 mm
Standard length: 2 m
2. Operation indicator (yellow)
44
715
Indicator (See note 2.
Two, clamping nuts
2
; Insulator diameter: 1.3 mm),
(See note 1.)
E2A3
E2A3-S08KS03-M1-@@
43.9
26.8
M8×1
45
Two, clam
M12×1
Indicator (See note.)
nuts
13
Note:Operation indicator (yellow LED, 4×90°)
E2A3-M12KS06-M1-@@
49.2
34
5.5
17
M12×1
Note:Operation indicator (yellow LED, 4×90°)
12
Indicator (See note.)
Two, clamping nuts
M12×1
E2A3-M18KS11-M1-@@
54.2
39
24
615
M18×1
Two, clam
M12×1
Indicator (See note.)
nuts
Note:Operation indicator (yellow LED, 4×90°)
E2A3-M30KS20-M1-@@
59.2
36
M30×1.5
Note:Operation indicator (yellow LED, 4×90°)
44
715
M12×1
Indicator (See note.)
Two, clam
nuts
D-41E2A3
Page 8
M8 Connector Models
E2A3-S08KS03-M5-@@
39.8
26.8
13
45
M8×1
M8×1
Indicator (See note.)
Two, clamping nuts
Note:Operation indicator (yellow LED, 4×90°)
Mounting Hole Cutout Dimensions
External diameter
of Proximity Sensor
M8
F
M12
M18
M30
Dimension F (mm)
+0.5
8.5 dia.
0
+0.5
12.5 dia.
0
+0.5
18.5 dia.
30.5 dia.
0
+0.5
0
D-42Inductive Sensors
Page 9
Safety Precautions
3
Precautions for Safe Use
WARNING
This product is not designed or rated for ensuring safety
of persons.
Do not it for such purposes.
Power Supply
Do not impose an excessive voltage on the E2A3, otherwise it may
be damaged. Do not impose AC current (100 to 240 VAC) on any DC
Model, otherwise it may be damaged.
Load Short-circuit
Do not short-circuit the load, or the E2A3 may be damaged.
The E2A3’s short-circuit protection function will be valid if the polarity
of the supply voltage is correct and within the rated voltage range.
Precautions for Correct Use
Designing
Power Reset Time
The Proximity Sensor is ready to operate within 100 ms after power
is supplied. If separate power supplies are connected to the Proximity Sensor and load, be sure to supply power to the Proximity Sensor
before supplying power to the load.
Effects of Surrounding Metal
When mounting the E2A3 within a metal panel, ensure that the
clearances given in the following tables are maintained.
l
Wiring
Be sure to wire the E2A3 and load correctly, otherwise it may be
damaged.
Connection with No Load
Be sure to insert a load when wiring. Make sure to connect a proper
load to the E2A3 during operation, otherwise it may damage internal
elements.
Do not expose the product to flammable or explosive gases.
Do not disassemble, repair, or modify the product.
Power OFF
The Proximity Sensor may output a pulse signal when it is turned
OFF. Therefore, it is recommended that the load be turned OFF
before turning OFF the Proximity Sensor.
Power Supply Transformer
When using a DC power supply, make sure that the DC power supply has an insulated transformer. Do not use a DC power supply with
an auto-transformer.
Mutual Interference
When installing two or more Sensors face-to-face or side-by-side,
ensure that the minimum distances given in the following table are
maintained.
d dia.
D
m
n
m
l
(Unit: mm)
DimensionM8M12
Model
E2A3
Shielded
Material of
surrounding
metal
l0.5 (*)2 (*)2 (*)1 (*)
m918
d2436
D0.5221
n2436
Ferrous
metal
Non-
ferrous
metal
Ferrous
metal
Non-
ferrous
metal
(Unit: mm)
DimensionM18M30
Model
E2A3
Shielded
* Using the nuts provided with the E2A3 allows mounting in the way shown be-
low.
Material of
surrounding
metal
l4 (*)2.5 (*)6 (*)4 (*)
m3360
d5490
D42.564
n5490
Ferrous
metal
Non-
ferrous
metal
Nut provided with E2A
Ferrous
metal
Non-
ferrous
metal
Typ e
Shielded
A
A
B
(Unit: mm)
Dimension
M8M12M18M30
A253570110
B20254570
E2A3
l = 0 mm
D-43E2A3
Page 10
Wiring
High-tension Lines
Wiring through Metal Conduit:
If there is a power or high-tension line near the cable of the Proximity
Sensor, wire the cable through an independent metal conduit to prevent against Proximity Sensor damage or malfunctioning.
Cable Extension
The standard cable length is less than 200 m.
The tractive force is 50 N.
Mounting
The Proximity Sensor must not be subjected to excessive shock with
a hammer when it is installed, otherwise the Proximity Sensor may
be damaged or lose its water-resistance.
Do not tighten the nut with excessive force. A washer must be used
with the nut.
Typ eTor que
M8Stainless Steel Model 9 N·m
Brass Model--M1220 N·m
M1860 N·m
M30150 N·m
Maintenance and Inspection
Periodically perform the following checks to ensure stable operation
of the Proximity Sensor over a long period of time.
1. Check for mounting position, dislocation, looseness, or distortion
of the Proximity Sensor and sensing objects.
2. Check for loose wiring and connections, improper contacts, and
line breakage.
3. Check for attachment or accumulation of metal powder or dust.
4. Check for abnormal temperature conditions and other environ-
mental conditions.
5. Check for proper lighting of indicators (for models with a set indicator).
Never attempt to disassemble or repair the Sensor.
Environment
Water Resistivity
The Proximity Sensors are tested intensively on water resistance, but
to ensure maximum performance and life expectancy, avoid immersion in water and provide protection from rain or snow.
Operating Environment
Store and operate the Proximity Sensor only within the given specifications.
Inrush Current
A load that has a large inrush current (e.g., a lamp or motor) will
damage the Proximity Sensor. Connect the load to the Proximity
Sensor through a relay.
<SUITABILITY FOR USE>
OMRON shall not be responsible for conformity with any standards, codes, or regulations that apply to the combination of the products in the
customer’s application or use of the products.
Take all necessary steps to determine the suitability of the product for the systems, machines, and equipment with which it will be used.
<CHANGE IN SPECIFICATIONS>
Product specifications and accessories may be changed at any time based on improvements and other reasons. Consult with your OMRON
representative at any time to confirm actual specifications of purchased product.
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. D102-E2-01A-X
In the interest of product improvement, specifications are subject to change without notice.
D-44Inductive Sensors
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