Omron E2EM User manual

1
Long-distance Proximity Sensor E2EM
Safe Mounting with Greater Sensing
Distance and Easy Wiring with No
Polarity
Ensures a sensing distance approximately 1.5 to 2
times larger than that of any conventional OMRON
Sensor.
Offers greater design flexibility and ease for the
detection of large-sized or non-ferrous sensing
objects.
Problems such as the collision of workpieces are
eliminated.
The E2EM has no polarity, thus eliminating
problems associated with reversed wiring.
Ordering Information
DC 2-wire/Pre-wired Models
Type Size Sensing distance
Model
ype
Se
Se s gdsa ce
NO NC
Shielded M12
4 mm E2EM-X4X1 (see note) E2EM-X4X2
S e ded
M18 8 mm E2EM-X8X1 (see note) E2EM-X8X2
M30 15 mm E2EM-X15X1 (see note) E2EM-X15X2
Unshielded M18
16 mm E2EM-X16MX1 E2EM-X16MX2
M30 30 mm E2EM-X30MX1 E2EM-X30MX2
Note: Connector relay models (cable length of 300 mm) are available.
DC 3-wire/Pre-wired Models
Type Size Sensing distance
Model
ype
Se
Se s gdsa ce
NPN NO PNP NO NPN NC PNP NC
Shielded M8
2 mm E2EM-X2C1 E2EM-X2B1 E2EM-X2C2 E2EM-X2B2
S e ded
M12 4 mm E2EM-X4C1 E2EM-X4B1 E2EM-X4C2 E2EM-X4B2
M18 8 mm E2EM-X8C1 E2EM-X8B1 E2EM-X8C2 E2EM-X8B2
M30 15 mm E2EM-X15C1 E2EM-X15B1 E2EM-X15C2 E2EM-X15B2
DC 3-wire/Connector Models
Type Size Sensing distance Output configuration Model
Shielded M8
2 mm
NPN NO E2EM-X2C1-M1
S e ded
M12 4 mm
O
E2EM-X4C1-M1
M18 8 mm E2EM-X8C1-M1
M30 15 mm E2EM-X15C1-M1
M8 2 mm
PNP NO E2EM-X2B1-M1
M12 4 mm
O
E2EM-X4B1-M1
M18 8 mm E2EM-X8B1-M1
M30 15 mm E2EM-X15B1-M1
Note: Models with output configuration of NPN NC and PNP NC are also available.

E2EM E2EM
2
Specifications
Ratings/Characteristics
E2EM-XjXjDC 2-wire Models
Item E2EM-X4XjE2EM-X8XjE2EM-X16MXjE2EM-X15XjE2EM-X30MXj
Size M12 M18 M30
Type Shielded Shielded Unshielded Shielded Unshielded
Sensing distance 4 mm ±10% 8 mm ±10% 16 mm ±10% 15 mm ±10% 30 mm ±10%
Setting distance (see note 1) 0 to 3.2 mm 0 to 6.4 mm 0 to 12.8 mm 0 to 12 mm 0 to 24 mm
Differential travel 15% max. of sensing distance
Sensing object Ferrous metal (refer to Engineering Data for non-ferrous metal on page 4)
Standard object (mild steel) 12 x 12 x 1 mm 18 x 18 x 1 mm 45 x 45 x 1 mm 30 x 30 x 1 mm 70 x 70 x 1 mm
Response frequency (see note 2) 1 kHz 0.5 kHz 0.4 kHz 0.25 kHz 0.1 kHz
Power supply voltage (operating
voltage range)
12 to 24 VDC, ripple (p-p): 10% max., (10 to 30 VDC)
Leakage current 0.8 mA max.
Control output Switching
capacity
5 to 100 mA
Residual
voltage (see
note 3)
5 V max. (under load current of 100 mA with cable length of 2 m)
Indicator X1 models: Operation indicator (red LED), operation set indicator (green LED)
X2 models: Operation indicator (red LED)
Operation (with sensing object
approaching)
X1 models: NO
X2 models: NC
For details, refer to the timing charts on page 5.
Circuit protection Surge absorber, load short-circuit protection
Ambient temperature Operating: –25 ° C to 70 ° C (with no icing or condensation)
Storage: –40 ° C to 85 ° C (with no icing or condensation)
Ambient humidity Operating/Storage: 35% to 95% (with no condensation)
T emperature influence ± 15% max. of sensing distance at 23 ° C in temperature range of –25 ° C to 70 °C
V oltage influence ± 1% max. of sensing distance in rated voltage range ±15%
Insulation resistance 50 M Ω min. (at 500 VDC) between current carry parts and case
Dielectric strength 1,000 V AC at 50/60 Hz for 1 min between current carry parts and case
V ibration resistance Destruction: 10 to 55 Hz, 1.5-mm double amplitude for 2 hours each in X, Y , and Z directions
Shock resistance Destruction: 1,000 m/s
2
for 10 times each in X, Y , and Z directions
Degree of protection IEC60529 IP67
Connection method Pre-wired models (standard length: 2 m)
W eight (packaged) Approx. 60 g Approx. 130 g Approx. 150 g Approx. 180 g Approx. 210 g
Material Case Brass
ae a
Sensing
surface PBT
Accessories Instruction manual
Note: 1. Use within a range where the green indicator is lit. (Excluding the X2 models.)
2. The response frequency of the DC switch section is an average value. Use standard sensing objects, provide a distance of twice the
standard sensing object distance between sensing objects, and provide a setting distance of half the sensing distance as measure -
ment
conditions.
3. Since the residual voltage is 5 V, confirm interface conditions with devices to be connected. Refer to page 11.

E2EM E2EM
3
E2EM-XjBj/CjDC 3-wire Models
Item E2EM-X2Bj/Cj
(-M1) E2EM-X4Bj/Cj (-M1) E2EM-X8Bj/Cj (-M1) E2EM-X15Bj/Cj (-M1)
Size M8 M12 M18 M30
Type Shielded
Sensing distance 2 mm ±10% 4 mm ±10% 8 mm ±10% 15 mm ±10%
Setting distance 0 to 1.6 mm 0 to 3.2 mm 0 to 6.4 mm 0 to 12 mm
Differential travel 10% max. of sensing distance
Sensing object Ferrous metal (refer to Engineering Data for non-ferrous metal on page 4)
Standard object (mild steel) 8 x 8 x 1 mm 12 x 12 x 1 mm 18 x 18 x 1 mm 30 x 30 x 1 mm
Response frequency (see note 2) 1.5 kHz 0.5 kHz 0.3 kHz 0.1 kHz
Supply voltage (operating voltage
range) (see note 1)
12 to 24 VDC, ripple (p-p): 10% max., (10 to 40 VDC)
Leakage current 13 mA max.
Control output
Switching capacity
(see note 1)
200 mA max.
Residual voltage 2 V max. (under load current of 200 mA with cable length of 2 m)
Indicator Operation indicator (Y ellow LED)
Operation (with sensing object
approaching)
B1, C1 models: NO
B2, C2 models: NC
For details, refer to the timing charts on page 5.
Circuit protection Reverse connection protection, surge absorber , load short-circuit protection
Ambient temperature (see note 2) Operating/Storage: –40 ° C to 85 ° C (with no icing or condensation) Operating:
–25° C to 70 °C
Storage:
–40° C to 85 °C
(with no icing or
condensation)
Ambient humidity Operating/Storage: 35% to 95% (with no condensation)
T emperature influence ± 15% max. of sensing distance at 23 ° C within temperature range of
–40° C to 85 °C
± 10% max. of sensing distance at 23 ° C within temperature range of
–25° C to 70 °C
± 15% max. of
sensing distance
at 23 ° C within
temperature range
of –25 ° C to 70 °C
V oltage influence ± 1% max. of sensing distance in rated voltage range ±15%
Insulation resistance 50 M Ω min. (at 500 VDC) between current carry parts and case
Dielectric strength 1,000 V AC at 50/60 Hz for 1 min between current carry parts and case
V ibration resistance Destruction: 10 to 55 Hz, 1.5-mm double amplitude for 2 hours each in X, Y , and Z
directions
Shock resistance Destruction:
500 m/s
2
for 10 times
each in X, Y , and Z
directions
Destruction: 1,000 m/s
2
for 10 times each in X, Y , and Z directions
Degree of protection IEC60529 IP67
Connection method Pre-wired models (standard length: 2 m)
Connector models (“-M1” models)
Weight
(kd)
Pre-wired Approx. 55 g Approx. 65 g Approx. 140 g Approx. 190 g
eg
(packaged) Connector
Approx. 10 g Approx. 20 g Approx. 40 g Approx. 90 g
Material Case
Stainless steel
(SUS303) Brass
Sensing surface PBT
Accessories Instruction manual
Note: 1. When using the M8 models within the temperature range from 70 ° C to 85 ° C, the voltage range must be from 10 to 30 VDC and
control output (switching capacity) must be 100 mA max.
2. The response frequency of the DC switch section is an average value. Use standard sensing objects, provide a distance of twice the
standard sensing object distance between sensing objects, and provide a setting distance of half the sensing distance as measure -
ment
conditions.

E2EM E2EM
4
Engineering Data
Operating Range (Typical)
Unshielded Models
E2EM-XjMXj
Sensing distance Y (mm)
Shielded Models
E2EM-XjXjE2EM-XBj/Cj
Sensing distance Y (mm) Sensing distance Y (mm)
Sensing distance X (mm) Sensing distance X (mm) Sensing distance X (mm)
E2EM-X30MX
E2EM-X16MX
E2EM-X15X
E2EM-X8X
E2EM-X4X
E2EM-X15B/C
E2EM-X8B/C
E2EM-X4B/C
E2EM-X2B/C
Influence of Sensing Object Size and Materials
E2EM-X2jj(-M1) E2EM-X4jj(-M1) E2EM-X8jj(-M1)
Mild steel
Stainless
steel
(SUS304)
Copper
Brass
Aluminum
t = 1 mm
Side length of sensing object d (mm)
Mild steel
Stainless steel
(SUS304)
Copper
Brass
t = 1 mm
Side length of sensing object d (mm)
Mild steel
Stainless
steel
(SUS304)
Copper
t = 1 mm
Side length of sensing object d (mm)
E2EM-X15jj(-M1) E2EM-X16MXjE2EM-X30MXj
Mild steel
Stainless steel
(SUS304)
Copper
t = 1 mm
Mild steel
Stainless steel
(SUS304)
t = 1 mm
Mild steel
Stainless steel
(SUS304)
Aluminum
Brass
t = 1 mm
Brass
Brass
Aluminum
Side length of sensing object d (mm)
Side length of sensing object d (mm)
Side length of sensing object d (mm)
Aluminum Copper
Brass
Copper
Sensing distance X (mm)
Sensing distance X (mm)
Sensing distance X (mm)
Sensing distance X (mm) Sensing distance X (mm) Sensing distance X (mm)
d d
d d
d d
d d
d d
d d

E2EM E2EM
5
Residual V oltage Characteristics
E2EM-XjXj
Output residual voltage (V)
Load current (mA)
Operation
Output Circuits
E2EM-XjXjDC 2-wire Models
Opera-
tion Model Timing
chart Output circuit
NO E2EM-X4X1
E2EM-X8X1
E2EM-X15X1
E2EM-X16MX1
E2EM-X30MX1
Non-sensing
zone Unstable sensing zone
Setting
position
Stable sensing
zone
Sensing
object
Proximity
Sensor
Rated sensing
distance
ON
OFF Set indicator
(green)
ON
OFF Operation
indicator
(red)
Control
output
ON
OFF
Main
circuit
(0 V)
0 V
Brown
Blue
Load
NC E2EM-X4X2
E2EM-X8X2
E2EM-X15X2
E2EM-X16MX2
E2EM-X30MX2
Rated sensing
distance
Non-sensing zone Sensing zone Proximity
Sensor
ON
OFF
Control
output
Sensing
object
Operation
indicator
(red)
ON
OFF
Note: 1. The load can be connected to ei -
ther
+V or 0 V line.
2. Since there is no polarity , there is
no need to pay attention to the
brown
or blue polarity .

E2EM E2EM
6
E2EM-XjBj/Cj(-M1) DC 3-wire Models
Operation Output
specifica-
tions
Model Timing chart Output circuit
NO
NPN open
collector
output
E2EM-X2C1 (-M1)
E2EM-X4C1 (-M1)
E2EM-X8C1 (-M1)
E2EM-X15C1 (-M1)
Sensing object
Control output
Yes
No
ON
OFF
Operation indicator
(yellow)
ON
OFF Main
circuit
Brown
Black
or
Load
NC E2EM-X2C2
E2EM-X4C2
E2EM-X8C2
E2EM-X15C2
Sensing object
Control output
Yes
No
ON
OFF
ON
OFF
Operation indicator
(yellow)
Blue
Note: Pin 4 is NO and pin 2 is NC.
0 V
NO PNP
open
collector
output
E2EM-X2B1 (-M1)
E2EM-X4B1 (-M1)
E2EM-X8B1 (-M1)
E2EM-X15B1 (-M1)
Sensing object
Control output
Yes
No
ON
OFF
Operation indicator
(yellow)
ON
OFF Main
circuit
Brown
Black
or
Load
1
42
+V
NC E2EM-X2B2
E2EM-X4B2
E2EM-X8B2
E2EM-X15B2
Sensing object
Control output
Yes
No
ON
OFF
ON
OFF
Operation indicator
(yellow)
Blue
Note: Pin 4 is NO and pin 2 is NC.
Load
0 V
3
100 Ω
E2EM-XjBj/Cj-M1 DC 3-wire Models
Connector Output configuration Applicable
models
Pin arrangement
M12 NO E2EM-XjC1-M1
Note: T erminal 2 is not used.
Load
E2EM-XjB1-M1
Note: Terminal 2 is not used.
Load
NC E2EM-XjC2-M1
Note: Terminal 4 is not used.
Load
E2EM-XjB2-M1
Note: Terminal 4 is not used.
Load

E2EM E2EM
7
Dimensions
Note: All units are in millimeters unless otherwise indicated.
Pre-wired Models (Shielded) Mounting
Hole
Dimensions Outer
diameter M8 M12 M18 M30
F (mm) 8.5 dia.
+0.5/0
12.5 dia.
+0.5/0
18.5 dia.
+0.5/0
30.5 dia.
+0.5/0
E2EM-X2Bj/Cj
E2EM-X8jj
E2EM-X4jj
E2EM-X15jj
15 dia.
Toothed washer
Two, tightening nuts
Indicator*2*1
*1: Vinyl-insulated round cable (2 cores/3 cores), 4 dia. (60/0.08 dia.)
Standard length: 2 m
Cable length (in single metal conduit): 200 m max.
*2: Operation indicator: yellow
21 dia.
Toothed washer
Two, tightening nuts
Indicator*2
*1: Vinyl-insulated round cable (2 cores/3 cores), 4 dia.
Conductor cross-section: 0.3 mm2/insulator diameter: 1.3 mm
Standard length: 2 m
*2: X1 models: Operation indicator: red, set indicator: green
X2 models: Operation indicator: red
B/C models: Operation indicator: yellow
42 dia.
Toothed washer
Two, tightening nuts
Indicator*2
*1: Vinyl-insulated round cable (2 cores/3 cores), 6 dia.
Conductor cross-section: 0.5 mm2/insulator diameter: 1.9 mm
Standard length: 2 m
*2: X1 models: Operation indicator: red, set indicator: green
X2 models: Operation indicator: red
B/C models: Operation indicator: yellow
29 dia.
Toothed washer
Two, tightening nuts
Indicator*2
*1: Vinyl-insulated round cable (2 cores/3 cores), 6 dia.
Conductor cross-section: 0.5 mm2/insulator diameter: 1.9 mm
Standard length: 2 m
*2: X1 models: Operation indicator: red, set indicator: green
X2 models: Operation indicator: red
B/C models: Operation indicator: yellow
*1
*1*1

E2EM E2EM
8
Pre-wired Models (Unshielded)
E2EM-X16MXj
E2EM-X30MXj
29 dia.
Toothed washer
Two, tightening nuts
Indicator*2
*1: Vinyl-insulated round cable (2 cores), 6 dia.
Conductor cross-section: 0.5 mm2/insulator diameter: 1.9 mm
Standard length: 2 m
*2: X1 models: Operation indicator: red, set indicator: green
X2 models: Operation indicator: red
14.8 dia.
42 dia.
Toothed washer
Two, tightening nuts
Indicator*2
*1: Vinyl-insulated round cable (2 cores), 6 dia.
Conductor cross-section: 0.5 mm2/insulator diameter: 1.9 mm
Standard length: 2 m
*2: X1 models: Operation indicator: red, set indicator: green
X2 models: Operation indicator: red
26.8 dia.
*1
*1
Connector Models (Shielded)
Mounting Hole
Dimensions Outer
diameter M8 M12 M18 M30
F (mm) 8.5 dia.
+0.5/0
12.5 dia.
+0.5/0
18.5 dia.
+0.5/0
30.5 dia.
+0.5/0
E2EM-X2Bj/Cj-M1
E2EM-X8Bj/Cj-M1
E2EM-X4Bj/Cj-M1
E2EM-X15Bj/Cj-M1
15 dia.
Toothed washer
Two, tightening nuts
Indicator*
21 dia.
Toothed washer
Two, tightening nuts
29 dia.
Toothed washer
Two, tightening nuts
42 dia.
Toothed washer
Two, tightening nuts
Indicator*
Indicator*
*Operation indicator: yellow
Indicator*
*Operation indicator: yellow
*Operation indicator: yellow
*Operation indicator: yellow

E2EM E2EM
9
When Proximity Sensor is Connected to Sensor I/O Connector
Shielded
(Straight) (L-shaped)
Dimensions when connected to XS2F (unit: mm)
Sensor diameter L1 L2
M8 Approx. 75 Approx. 62
M12 DC
Approx. 80 Approx. 67
AC Approx. 85 Approx. 72
M18 Approx. 85 Approx. 72
M30 Approx. 90 Approx. 77
Accessories (Order Separately)
Mounting Brackets
Four kinds of resin mounting brackets are available. Choose an appropriate one depending on external dimensions
Model Dimensions
(mm)
Hexagonal
bolts Applicable Sensor
A B C D E F
bolts
Sensor
outer
diameter
Y92E-B8 18±0.2 10 max. 18 8 dia. 28 max. 6 M4 x 20 M8
Y92E-B12 24±0.2 12.5 max. 20 12 dia. 37 max. 6 M4 x 25 M12
Y92E-B18 32±0.2 17 max. 30 18 dia. 47 max. 7 M5 x 32 M18
Y92E-B30 45±0.2 17 max. 50 30 dia. 60 max. 10 M5 x 50 M30
Note: When using the Mounting Brackets for unshielded models, pay attention to the influence of surrounding metals. (For dimensions of
Sensors, refer to the dimensions shown for each model.)
Installation
Connection with Sensor I/O Connectors
Proximity Sensors
Sensor I/O Connectors Connection
Type Opera-
tion Model
Se so /O Co ec o s
Co ec o
DC
3-wire NO E2EM-XjC1-M1
XS2F-D42j-jC0-A
1: Straight
2: L-shaped
D: 2-m cable
G: 5-m cable
E2EM XS2F
Brown (+V)
Blue (0 V)
Black
(Output)
Main circuit
XS2F D42j j80 A
1: Straight
2: L-shaped
E2EM XS2F
Brown (+V)
Blue (0 V)
Black
(Output)
White (Empty)
Main circuit
NC E2EM-XjC2-M1 XS2F-D42j-j80-A
D: 2-m cable
G: 5-m cable
E2EM XS2F
Brown (+V)
Blue (0 V)
Black
(Empty)
White (Output)
Main circuit
Note: For details, refer to the Sensor I/O Connectors Catalog (G010).

E2EM E2EM
10
Precautions
Safety Precautions
Power Supply
Do not impose an excessive voltage on the E2EM, otherwise it may
be damaged. Do not impose AC current (100 VAC) on any E2EM
DC
model, otherwise it may be damaged.
Load Short-circuit
Do not short-circuit the load, or the E2EM may be damaged.
The E2EM’ s short-circuit protection function will be valid if the polar -
ity
of the supply voltage imposed is correct and within the rated volt -
age
range.
Wiring
Be sure to wire the E2EM and load correctly, otherwise it may be
damaged.
Connection with No Load
Be sure to insert loads when wiring. Make sure to connect a proper
load to the E2EM in operation, otherwise it may damage internal ele -
ments.
Do not expose the product to flammable or ex-
plosive gases.
Do not disassemble, repair, or modify the prod-
uct.
Correct Use
Designing
Power Reset T ime
The
Proximity Sensor is ready to operate within 100 ms after power
is supplied. If power supplies are connected to the Proximity Sensor
and load respectively , be sure to supply power to the Proximity Sen -
sor
before supplying power to the load.
Effects of Surrounding Metal
When mounting the E2EM within a metal panel, ensure that the
clearances
given in the following table are maintained.
ȏ
d dia.
ȏ
(Unit: mm)
Type Item M8 M12 M18 M30
E2EM-
XjXj
Shielded ȏ--- 2.4 3.6 6
XjXj
DC 2
-
wire
S e ded
d 18 27 45
DC
2
-w
i
re D 2.4 3.6 6
m 12 24 45
n 18 27 45
Unshielded ȏ--- --- 25 45
U s e ded
d 70 120
D 25 45
m 48 90
n 70 120
E2EM-
XjBj/Cj
Shielded ȏ0 2.4 3.6 6
XjBj/Cj
DC 3
-
wire
S e ded
d 8 18 27 45
DC
3
-w
i
re D 0 2.4 3.6 6
m 4.5 12 24 45
n 12 18 27 45
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 .
AND/OR Connection
When
using the product in an AND/OR circuit, the product may not
function properly due to incorrect pulses or leakage currents.
Therefore,
confirm that no problems will occur before actually using
the product in such a circuit.
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)
Type Item M8 M12 M18 M30
E2EM-
XjXj
Shielded A--- 30 60 110
XjXj
DC 2
-
wire
S e ded
B 20 35 90
DC
2
-w
i
re Unshielded A--- 200 350
U s e ded
B 120 300
E2EM-
XjB/C
Shielded A 20 30 60 110
XjB
/C
DC 3-wire B 15 20 35 90

E2EM E2EM
11
Designing
Confirmation of Connection between DC 2-wire Proximity
Sensor and Programmable Controller
Connection conditions are determined from the relationship be-
tween
the input ON voltage and OFF voltage of the PC and the out -
put
residual voltage and leakage current of the Proximity Sensor .
Connection Conditions
1. Relationship between the ON voltage of the PC and the
residual
voltage of the Proximity Sensor must be as follows:
VonxVcc – V
R
Von : ON voltage of the PC
Vcc : Supply voltage
VR : Output residual voltage the Proximity Sensor
2. Relationship between the OFF voltage of the PC and the
leakage
current of the Proximity Sensor must be as follows:
VoffyIleak x Rin
Voff : OFF voltage of the PC
Ileak : Leakage current of the Proximity Sensor
Rin : Input impedance of the PC
Connection is possible under the following conditions.
Example values on the PC side
ON voltage: 10.2 V min.
OFF voltage: 3 V max.
Input impedance: 3.5 k Ω
Example values on the Proximity Sensor side
Output residual voltage: 5 V max.
Leakage current: 0.8 mA max.
If these values are put in the above formula, V
on
and V
off
will be as
follows:
Von : 10.2 V t 24 V–5 V (=19 V)
Voff : 3 V u 0.8 mA x 3.5 k Ω (=2.8 V)
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.
Connections
DC 2-wire Models
Connection to relay load
Brown
Blue 24 VDC
Note: The residual voltage of the DC 2-wire model is 5 V . Check
the operating voltage of the relay .
DC 3-wire Models
Connection to S3D2 Sensor Controller
Operation can be reversed by selecting the signal input selec
-
tor of the S3D2.
Blue 0 V
Black OUT
Brown +12 V
S3D2
Cable Extension
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-resistivity .
Do
not tighten the nut with excessive force. A washer must be used
with the nut.
Shielded Model Unshielded Model
Part B Part A Part B Part A
Note: The table below shows the tightening torques for part A and
part B nuts. In the previous examples, the nut is on the sen -
sor
head side (part B) and hence the tightening torque for
part B applies. If this nut is in part A, the tightening torque for
part A applies instead.
Type Part A Part B
Length Torque Torque
M8 Shielded 9 mm 9 N S m 12 N S m
M12 30 N S m
M18 70 N S m
M30 180 N S 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
environmental
conditions.
5. Check for proper lighting of indicators (for models with a set
indicator.)
Never disassemble or repair the Sensor .
Environment
W ater Resistivity
Do not use the Proximity Sensor underwater, outdoors, or in the
rain.
Operating
Environment
Be sure to use the Proximity Sensor within its operating ambient
temperature
range and do not use the Proximity Sensor outdoors so
that its reliability and life expectancy can be maintained. Although
the Proximity Sensor is water resistive, a cover to protect the Prox -
imity Sensor from water or water-soluble machining oil is recom-
mended
so that its reliability and life expectancy can be maintained.
Do not use the Proximity Sensor in an environment with chemical
gas (e.g., strong alkaline or acid gasses including nitric, chromic,
and
concentrated sulfuric acid gases).
Connecting Load to DC 2-wire Sensor
Refer to the following before using DC 2-wire Proximity Sensors.
Surge Protection
Although the Proximity Sensor has a surge absorption circuit, if
there
is any machine that has a large surge current (e.g., a motor or
welding machine) near the Proximity Sensor , connect a surge sup -
pressor
to the machine.

E2EM E2EM
12
Leakage Current
When the Proximity Sensor is OFF , the Proximity Sensor has leak -
age current. In this case, the load is imposed with a small voltage
and
the load may not be reset. Before using the Proximity Sensor ,
make
sure that this voltage is less than the load reset voltage.
Countermeasures Against Leakage Current
Connect a bleeder resistor as the bypass for the leakage current so
that the current flowing into the load will be less than the load reset
current.
Bleeder resistor R
Load
VS
Refer to the following to calculate the bleeder resistance and the al -
lowable
power of the bleeder resistor .
R x
V
S/(iR
– i
OFF) (kΩ)
P > V
S2/R (mW)
P: The
allowable power of the bleeder resistor . (The actual power
capacity of the bleeder resistor must be at least a few times
larger
than the allowable power of the bleeder resistor .)
iR:
Leakage current of the Proximity Sensor (mA)
iOFF : Load reset current (mA)
It is recommended that 15 kΩmax./450 mW min. for 12 VDC and
30 k Ω max./0.1 W min. for 24 VDC be used.
Inrush Current
A load that has a large inrush current (e.g., a lamp or motor) will
damage
the Proximity Sensor , in which case connect the load to the
Proximity Sensor through a relay .
24
OMRON Corporation
Industrial Automation Company
Industrial Sensors Division
Sensing Devices and Components Division H.Q.
28th Fl., Crystal T ower Bldg.,
1-2-27, Shiromi, Chuo-ku,
Osaka 540-6028 Japan
Phone: [phone] Fax: [phone]
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. T o convert grams into ounces, multiply by 0.03527.
Cat. No. D090-E1-1 In the interest of product improvement, specifications are subject to change without notice.
Printed in Japan
0599-3M (0599) a