Specifications are subject to change without notice (14.03.2006)
1
Photoelectrics
Through-beam
Type ET 1820 DC, Nickel-plated Brass Housing
Product Description
Type
Housing diameter
Range
Output type
Housing material
Connection type
Range: 20 m
Adjustable sensitivity
Modulated infrared light
Make and break switching functions,
NPN, PNP (200 mA)
LED-indication for power supply ON (emitter) and
target detected (receiver)
Supply voltage: 10 to 40 VDC
Heavy duty M18 metal housing, IP 67
Cable and plug versions
Ordering Key
The ET1820 is a family of gen-
eral purpose through-beam
sensors in an industrial stan-
dard M18 nickel-plated brass
housing for heavy duty appli-
cations. They are useful for
simple applications where a
basic sensor provide adequate
sensing performance. The sen-
sors are easy to adjust with a
270 single turn potentiometer.
The output is a 4-wire comple-
mentary (NO and NC) circuit
with NPN (current sinking) or
PNP (current sourcing) open
collector transistor output.
Housing
Rated
Connection
Ordering no.
Ordering no.
Ordering no.
diameter
operating
Receiver/NPN Receiver/PNP
Emitter
dist. (S
n
)
Make & break switching
Make & break switching
M18
20 m
Cable
ET 1820 NPAS
ET 1820 PPAS
ET 1820
M18
20 m
Plug
ET 1820 NPAS-1
ET 1820 PPAS-1
ET 1820-1
Note: Please order emitter and receiver separately.
Type Selection
ET 18 20 NPA S-1
Specifications Emitter
Rated operational volt. (U
B
)
10 to 40 VDC
(ripple included)
Ripple (U
rpp
)
10%
Supply current (I
o
)
20 mA
Protection
Reverse polarity,
short-circuits, transients
Light source
GaAIAs LED, 880 nm
Light type
Infrared, modulated
Optical angle
2
Indication
Supply ON
LED, green
Specifications Receiver
Rated operating dist. (S
n
)
Up to 10 m
Sensitivity
270 single turn pot. meter
Temperature drift
0.6%/C
Hysteresis (H) (Differential travel) 3 to 20%
Rated operational volt. (U
B
)
10 to 40 VDC (ripple included)
Ripple (U
rpp
)
Max. 10%
No-load supply current (I
o
)
Max. 12 mA (typ. 8 mA)
Min. operational current (I
e
)
0.5 mA
OFF-state current (I
r
)
Max. 100 A (typ. 0)
Output current
Continuous (I
e
)
Max. 200 mA
Short-time (I)
200 mA
Max. load capacity 100 nF
Voltage drop (U
d
)
Max. 2.5 VDC
Protection
Reverse polarity,
short-circuit, transients
Optical angle
2
Ambient light
Max. 5,000 lux
Operating frequency (f)
Typ. 170 Hz
Response time
OFF-ON (t
ON
)
Typ. 1.6 ms
ON-OFF (t
OFF
)
Typ. 4.2 ms
2
Specifications are subject to change without notice (14.03.2006)
Dimensions
Power ON delay (t
v
)
70 ms
Indication
Light and dark
(Complementary switch)
Output ON
LED, yellow
Environment
Overvoltage category
III (IEC 60664/664A; 60947-1)
Pollution degree
3 (IEC 60664/664A; 60947-1)
Degree of protection
IP 67 (IEC 60529; 60947-1)
Temperature
Operating
-20 to +60C (-4 to +140F)
Storage
-30 to +70C (-22 to +158F)
Vibration
10 to 150 Hz, 0.5 mm/7.5 g
(IEC 60068-2-6)
Shock
2 x 1 m & 100 x0.5 m
(IEC 60068-2-32)
Dielectric voltage
500 VAC
(IEC 60364-4-41)
General Specifications
Operation Diagram
Power supply
Object present, light beam interrupted
Tv
Tv
Output ON: Break switching (NC)
Make switching (NO)
PNP
+
-
1 BN
4 BK
2 WH
3 BU
+
-
BN
BU
10 - 40 VDC
Emitter
Wiring Diagrams
+
-
1 BN
4 BK
2 WH
3 BU
NPN
Housing material
Body
Nickel plated brass
Front
PC, black
Cable end
Polyester, black
Nuts
Nickel plated brass
Connection
Cable
Grey, 2 m oilproof, PVC,
Receiver
4 x 0.34 mm
2
, 5.2 mm
Ermitter
2 x 0.5 mm
2
, 5.2 mm
Plug
M12 x 1
Cables for plug (M1)
CON.1A-..series
Weight
Cable version
137 g
Plug version
54 g
Approvals
UL, CSA
CE-marking
Yes
ET 1820 DC
Specifications are subject to change without notice (14.03.2006)
3
Detection Diagram
Delivery Contents
Photoelectric switch: ET 1820
2 nuts
Packaging: Plastic bag
Accessories
Y
X
Emitter
Receiver
-20.0
-10.0
0.0
10.0
20.0
0.0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
Distance (m)
(cm)
6.6
13
20
26
33
39
46
-8
-4
0
4
8
(feet)
(inch)
MB18A
Connector type CON.1A../CON.14NF.. series
APA18-RAR
APA18-AR
For further information refer to "Accessories".
Installation Hints
Relief of cable strain
Protection of the sensing face
Switch mounted on mobile carrier
To avoid interference from inductive voltage/
current peaks, separate the prox. switch pow-
er cables from any other power cables, e.g.
motor, contactor or solenoid cables
Incorrect
Correct
The cable should not be pulled
A proximity switch should not serve as
mechanical stop
Any repetitive flexing of the
cable should be avoided
ET 1820 DC
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