Omron E2A3 - User manual

D-35E2A3
E2A3
Long Distance Cylindrical Proximity Sensor
E2A3
Extra long distance for
increased protection and
sensing performance
• triple distance proximity sensors for flush mounting re-
quirements.
• designed and tested for extra long life.
.
Ordering Information
DC 3-wire Models
Note:Material specifications for stainless steel housing case: 1.4305 (W.-No.), SUS303 (AISI), 2346 (SS).
Size Type Sensing
distance Connection Body material
Thread
length Output Operation mode: NO Operation mode: NC
M8 Shielded 3.0mm
Pre-wired
Stainless steel
(See note.)
27 (40) mm PNP E2A3-S08KS03-WP-B1 2M E2A3-S08KS03-WP-B2 2M
NPN E2A3-S08KS03-WP-C1 2M E2A3-S08KS03-WP-C2 2M
M12
connector 27 (44) mm PNP E2A3-S08KS03-M1-B1 E2A3-S08KS03-M1-B2
NPN E2A3-S08KS03-M1-C1 E2A3-S08KS03-M1-C2
M8
connector
(3-pin)
27 (40) mm
PNP E2A3-S08KS03-M5-B1 E2A3-S08KS03-M5-B2
NPN E2A3-S08KS03-M5-C1 E2A3-S08KS03-M5-C2
M12 Shielded 6.0mm
Pre-wired
Brass
34 (50) mm PNP E2A3-M12KS06-WP-B1 2M E2A3-M12KS06-WP-B2 2M
NPN E2A3-M12KS06-WP-C1 2M E2A3-M12KS06-WP-C2 2M
M12
connector 34 (49) mm PNP E2A3-M12KS06-M1-B1 E2A3-M12KS06-M1-B2
NPN E2A3-M12KS06-M1-C1 E2A3-M12KS06-M1-C2
M18 Shielded 11.0mm
Pre-wired
Brass
39 (60) mm PNP E2A3-M18KS11-WP-B1 2M E2A3-M18KS11-WP-B2 2M
NPN E2A3-M18KS11-WP-C1 2M E2A3-M18KS11-WP-C2 2M
M12
connector 39 (54) mm PNP E2A3-M18KS11-M1-B1 E2A3-M18KS11-M1-B2
NPN E2A3-M18KS11-M1-C1 E2A3-M18KS11-M1-C2
M30 Shielded 20.0mm
Pre-wired
Brass
44 (65) mm PNP E2A3-M30KS20-WP-B1 2M E2A3-M30KS20-WP-B2 2M
NPN E2A3-M30KS20-WP-C1 2M E2A3-M30KS20-WP-C2 2M
M12
connector 44 (59) mm PNP E2A3-M30KS20-M1-B1 E2A3-M30KS20-M1-B2
NPN E2A3-M30KS20-M1-C1 E2A3-M30KS20-M1-C2

D-36 Inductive Sensors
Connectivity
E2A3 Sensors are available with the following connectors and cable materials:
Pre-wired Models
Standard cable lengths are 2 m and 5 m.
For other cable lengths, please contact your OMRON
representative.
Standard cable material: PVC (4-mm dia.) -WP
Connector Models
Standard connectors: M12, M8 (3-pin) -M1, -M5
Model Number Legend
Example: E2A3-M12KS06-M1-B1 Triple distance, M12, standard barrel, shielded, Sn = 6 mm, M12 connector, PNP-NO
E2A3-S08KS03-WP-B1 2M Triple distance, M8 stainless steel, standard barrel, shielded, Sn = 3 mm, pre-wired PVC cable,
PNP-NO, cable length = 2 m
1. Basic name
E2A
2. Sensing technology
Blank: Standard double distance
3: Triple distance
3. Housing shape and material
M: Cylindrical, metric threaded, brass
S: Cylindrical, metric threaded, stainless steel
4. Housing size
08: 8 mm
12: 12 mm
18: 18 mm
30: 30 mm
5. Barrel length
K: Standard length
L: Long body
6. Shield
S: Shielded
N: Non-shielded
7. Sensing distance
Numeral: Sensing distance: e.g., 03 = 3 mm, 11 = 11 mm
8. Kind of connection
WP: Pre-wired, PVC, 4-mm dia.
M1: M12 connector (4-pin) *
M5: M8 connector (3-pin)
9. Power source and output
B: DC, 3-wire, PNP open collector
C: DC, 3-wire, NPN open collector
10.Operation mode
1: Normally open (NO)
2: Normally closed (NC)
11.Specials (e.g., cable material, oscillating frequency)
12.Cable length
Blank: Connector Model
Numeral: Cable length
2 3 4 5 6 7 8 9 10 111 12
E2A@-@@@@@-@-@@-@@

D-37E2A3
E2A3
Specifications
DC 3-wire Models
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.
Size M8 M12 M18 M30
Type Shielded Shielded Shielded Shielded
Item
E2A3-S08KS03-@@-B@
E2A3-S08KS03-@@-C@
E2A3-M12KS06-@@-B@
E2A3-M12KS06-@@-C@
E2A3-M18KS11-@@-B@
E2A3-M18KS11-@@-C@
E2A3-M30KS20-@@-B@
E2A3-M30KS20-@@-C@
Sensing distance 3 mm ±10% 6 mm ± 10% 11 mm ±10% 20 mm ±10%
Setting
distance
Ambient temp. of
−25 to 70°C 0 to 2.1 mm 0 to 4.2 mm 0 to 7.7 mm 0 to 14 mm
Ambient temp. of
−10 to 60°C 0 to 2.4 mm 0 to 4.8 mm 0 to 8.8 mm 0 to 16 mm
Differential travel 20% max. of sensing distance
Target Ferrous metal (The sensing distance decreases with non-ferrous metal.)
Standard sensing object 9 ×9 ×1 mm 18 ×18 ×1 mm 33 ×33 ×1 mm 60 ×60 ×1 mm
Response frequency (See note 1.) 700 Hz 350 Hz 250 Hz 80 Hz
Power supply voltage
(operating voltage range)
12 to 24 VDC. Ripple (p-p): 10% max.
(10 to 32 VDC)
Current consumption 10 mA max.
Output type -B models: PNP open collector
-C models: NPN open collector
Control output Load current 200 mA max. (32 VDC max.)
Residual voltage 2 V max. (under load current of 200 mA with cable length of 2 m)
Indicator Operation indicator (Yellow LED)
Operation mode
-B1/-C1 models: NO
-B2/-C2 models: NC
For details, refer to the timing charts.
Protection circuits
Power source circuit re-
verse polarity protection,
Surge suppressor, Short-
circuit protection
Output reverse polarity protection, Power source circuit reverse polarity protec-
tion, Surge suppressor, Short-circuit protection
Ambient air temperature Operating: −25°C to 70°C, Storage: −25°C to 70°C
Temperature influence ±20% max. of sensing distance at 23°C within temperature range of −25°C to 70°C
−10% to +20% of sensing distance at 23°C within temperature range of −10°C to 60°C
Ambient humidity Operating: 35% to 95%, Storage: 35% to 95%
Voltage influence ±1% max. of sensing distance in rated voltage range ±15%
Insulation resistance 50 MΩmin. (at 500 VDC) between current-carrying parts and case
Dielectric strength 1,000 VAC at 50/60 Hz for 1 min between current-carrying parts and case
Vibration resistance 10 to 55 Hz, 1.5-mm double amplitude for 2 hours each in X, Y, and Z directions
Shock resistance 500 m/s2, 10 times each
in X, Y, and Z directions 1,000 m/s2, 10 times each in X, Y and Z directions
Standards and listings
(See note 2.)
IP67 after IEC 60529
IP69K after DIN 40050
EMC after EN60947-5-2
Connection method
-WP models: Pre-wired Models (4-mm dia. PVC cable with length of 2 m)
-M1 models: M12 4-pin Connector Models
-M5 models: M8 3-pin Connector Models
Weight
(packed state)
Pre-wired Models Approx. 65 g Approx. 85 g Approx. 160 g Approx. 280 g
Connector Models M12 Connector Models:
Approx. 20 g Approx. 35 g Approx. 70 g Approx. 200 g
Material
Case Stainless steel Brass-nickel plated
Sensing surface PBT
Cable PVC
Clamping nut Stainless steel Brass-nickel plated

D-38 Inductive Sensors
Engineering Data
Operating Range (Typical)
Influence of Sensing Object Size and Materials
Distance Y (mm)
Sensing distance X (mm)
22
20
18
16
14
12
10
8
6
4
2
0
−30 −20 −10 0 10 20 30
X
Y
E2A3-M30KS20
E2A3-M18KS11
E2A3-M12KS06
E2A3-S08KS03
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0 5 10 15 20 25
Side length of sensing object d (mm)
Sensing distance X (mm)
E2A3-S08KS03
X
@d
t = 1 mm
Iron
Brass
Copper
Stainless steel (SUS303)
Aluminum
7
6
5
4
3
2
1
0
0 5 10 15 20 25 30
Side length of sensing object d (mm)
Sensing distance X (mm)
E2A3-M12KS06
X
@d
t = 1 mm
Iron
Brass
Copper
Stainless steel (SUS303)
Aluminum
12
10
8
6
4
2
0
0 10 20 30 40 50
Side length of sensing object d (mm)
Sensing distance X (mm)
E2A3-M18KS11
X
@d
t = 1 mm
Aluminum
Iron
Brass
Copper
Stainless steel (SUS303)
25
20
15
10
5
0
Side length of sensing object d (mm)
Sensing distance X (mm)
E2A3-M30KS20
X
@d
t = 1 mm
0 10 20 30 40 50 60
Iron
Brass
Copper
Stainless steel (SUS303)
Aluminum

D-39E2A3
E2A3
Operation
DC 3-wire Models
PNP Output
Operation mode Model Timing chart Output circuit
NO E2A3-@-@-B1
NC E2A3-@-@-B2
Sensing
object
(%) 100 0
Rated sensing distance
Sensing areaNon-sensing area
Proximity
Sensor
ON
OFF
ON
OFF
Yellow indicator
Control output
3
1
243
1
4
Load
Brown
Black
(See note 1.)
Blue
+V
0 V
Note 1: With M8 Size Models, there is no output reverse
polarity protection diode.
M12 Connector
Pin Arrangement
(See note 2.)
M8 Connector
(3-pin)
Pin Arrangement
Note 2: Terminal 2 of the M12 connector is not used.
Proximity
Sensor
main
circuits
(%) 100 0
Sensing
object
Rated sensing distance
Sensing areaNon-sensing area
Proximity
Sensor
ON
OFF
ON
OFF
Yellow indicator
Control output
3
1
24
Load
Brown
Black
(See note 1.)
Blue
+V
0 V
Note 1: With M8 Size Models, there is no output reverse
polarity protection diode.
M12 Connector
Pin Arrangement
(See note 2.)
3
1
4
M8 Connector
(3-pin)
Pin Arrangement
Note 2: Terminal 4 of the M12 connector is not used.
Proximity
Sensor
main
circuits
(M8 connector: )

D-40 Inductive Sensors
DC 3-wire Models
NPN Output
Operation mode Model Timing chart Output circuit
NO E2A3-@-@-C1
NC E2A3-@-@-C2
Sensing
object
(%) 100 0
Rated sensing distance
Sensing areaNon-sensing area
Proximity
Sensor
ON
OFF
ON
OFF
Yellow indicator
Control output
Load
Brown
Black
(See note 1.)
Blue
+V
0 V
Note 1: With M8 Size Models, there is no output reverse
polarity protection diode.
Note 2: Terminal 2 of the M12 connector is not used.
Proximity
Sensor
main
circuits
3
1
24
M12 Connector
Pin Arrangement
(See note 2.)
3
1
4
M8 Connector
(3-pin)
Pin Arrangement
(%) 100 0
Sensing
object
Rated sensing distance
Sensing areaNon-sensing area
Proximity
Sensor
ON
OFF
ON
OFF
Yellow indicator
Control output
Load
Brown
Black
(See note 1.)
Blue
+V
0 V
Note 1: With M8 Size Models, there is no output reverse
polarity protection diode.
Note 2: Terminal 4 of the M12 connector is not used.
Proximity
Sensor
main
circuits
(M8 connector: )
3
1
24
M12 Connector
Pin Arrangement
(See note 2.)
3
1
4
M8 Connector
(3-pin)
Pin Arrangement

D-41E2A3
E2A3
Dimensions
Note:All units are in millimeters unless otherwise indicated.
Pre-wired Models
E2A3-S08KS03-WP-@@
Note 1. 4-dia. vinyl-insulated round cable with 3 conductors (Conduc-
tor cross section: 0.3 mm2; Insulator diameter: 1.3 mm),
Standard length: 2 m
2. Operation indicator (yellow)
E2A3-M12KS06-WP-@@
Note 1. 4-dia. vinyl-insulated round cable with 3 conductors (Conduc-
tor cross section: 0.3 mm2; Insulator diameter: 1.3 mm),
Standard length: 2 m
2. Operation indicator (yellow)
E2A3-M18KS11-WP-@@
Note 1. 4-dia. vinyl-insulated round cable with 3 conductors (Conduc-
tor cross section: 0.3 mm2; Insulator diameter: 1.3 mm),
Standard length: 2 m
2. Operation indicator (yellow)
E2A3-M30KS20-WP-@@
Note 1. 4-dia. vinyl-insulated round cable with 3 conductors (Conduc-
tor cross section: 0.3 mm2; Insulator diameter: 1.3 mm),
Standard length: 2 m
2. Operation indicator (yellow)
M12 Connector Models
E2A3-S08KS03-M1-@@
Note:Operation indicator (yellow LED, 4×90°)
E2A3-M12KS06-M1-@@
Note:Operation indicator (yellow LED, 4×90°)
E2A3-M18KS11-M1-@@
Note:Operation indicator (yellow LED, 4×90°)
E2A3-M30KS20-M1-@@
Note:Operation indicator (yellow LED, 4×90°)
40
26.8
45
13
(See note 1.)
Indicator (See note 2.)
Two, clamping nuts
M8×1
17
50.4
34
5.5 12
(See note 1.)
Indicator (See note 2.)
Two, clam
p
in
g
nuts
M12×1
24
59.6
39
615
(See note 1.)
Indicator (See note 2.)
Two, clamping nuts
M18×1
36
64.6
44
715
(See note 1.)
Indicator (See note 2.
)
Two, clamping nuts
M30×1.5
43.9
26.8
45
13
Indicator (See note.)
Two, clam
p
in
g
nuts
M8×1
M12×1
17
49.2
34
5.5 12
Indicator (See note.)
Two, clamping nuts
M12×1
M12×1
24
54.2
39
615
Indicator (See note.)
Two, clam
p
in
g
nuts
M18×1
M12×1
36
59.2
44
715
Indicator (See note.)
Two, clam
p
in
g
nuts
M30×1.5
M12×1

D-42 Inductive Sensors
M8 Connector Models
E2A3-S08KS03-M5-@@
Note:Operation indicator (yellow LED, 4×90°)
39.8
26.8
45
13
Two, clam
p
in
g
nuts
M8×1
M8×1
Indicator (See note.)
Mounting Hole Cutout Dimensions
F
External diameter
of Proximity Sensor
Dimension F (mm)
M18
M30
M8
M12
8.5 dia.+0.5
0
12.5 dia.+0.5
0
18.5 dia.+0.5
0
30.5 dia.+0.5
0

D-43E2A3
E2A3
Safety Precautions
Precautions for Safe Use
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.
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 explo-
sive gases.
Do not disassemble, repair, or modify the product.
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 Proxim-
ity 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.
(Unit: mm)
(Unit: mm)
* Using the nuts provided with the E2A3 allows mounting in the way shown be-
low.
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 sup-
ply 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.
(Unit: mm)
This product is not designed or rated for ensuring safety
of persons.
Do not it for such purposes.
WARNING
Model
Dimension M8 M12
Material of
surrounding
metal
Ferrous
metal
Non-
ferrous
metal
Ferrous
metal
Non-
ferrous
metal
E2A3
Shielded
l 0.5 (*) 2 (*) 2 (*) 1 (*)
m9 18
d24 36
D0.5221
n24 36
Model
Dimension M18 M30
Material of
surrounding
metal
Ferrous
metal
Non-
ferrous
metal
Ferrous
metal
Non-
ferrous
metal
E2A3
Shielded
l 4 (*) 2.5 (*) 6 (*) 4 (*)
m33 60
d54 90
D42.564
n54 90
l
m
n
m
D
d dia.
l
l = 0 mm
Nut provided with E2A
3
Type Dimension M8 M12 M18 M30
Shielded A 253570110
B 20254570
A
A
B

D-44 Inductive Sensors
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 pre-
vent 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.
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 indi-
cator).
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 immer-
sion in water and provide protection from rain or snow.
Operating Environment
Store and operate the Proximity Sensor only within the given specifi-
cations.
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.
Type Torque
M8 Stainless Steel Model 9 N·m
Brass Model ---
M12 20 N·m
M18 60 N·m
M30 150 N·m
In the interest of product improvement, specifications are subject to change without notice.
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