Germany: +49 621 776 4411Pepperl+Fuchs Group
Refer to “General Notes Relating to Pepperl+Fuchs Product Information”.
USA: +1 330 486 0001 Singapore: +65 6779 9091
www.pepperl-fuchs.com fa-info@us.pepperl-fuchs.com fa-info@sg.pepperl-fuchs.com
fa-info@de.pepperl-fuchs.com
1
Diffuse mode sensor
VT18-8-400-M/40a/118/128
Release date: 2015-02-05 13:57 Date of issue: 2015-02-12 801132_eng.xml
Dimensions
Electrical connection
Unit connector
Light/dark switch
Indicating/
Operating means
LED yellow LED green
Detail "A"
Detail "A"
Sensing range adjuster
11.2
7.8
2
43.8
44.6
47.1
53.9
65
78
M18 x 1
4
24
4
3
21
SENS.
DL
Option:
2
1
3
4
+UB
n. c.
Q
0 V
/128
= Light on
= Dark on
Model Number
VT18-8-400-M/40a/118/128
Diffuse mode sensor
with 4-pin, M12 x 1 connector
Features
• Array control panel with highly visible
LED display
• Flashing power on LED in case of
short-circuit
• Multiple device installation possible,
no mutual interference (no cross-talk)
• Not sensitive to ambient light, even
with switched energy saving lamps
• Protection class II
Germany: +49 621 776 4411Pepperl+Fuchs Group
Refer to “General Notes Relating to Pepperl+Fuchs Product Information”.
USA: +1 330 486 0001 Singapore: +65 6779 9091
www.pepperl-fuchs.com fa-info@us.pepperl-fuchs.com fa-info@sg.pepperl-fuchs.com
fa-info@de.pepperl-fuchs.com
Diffuse mode sensor
VT18-8-400-M/40a/118/128
2
Release date: 2015-02-05 13:57 Date of issue: 2015-02-12 801132_eng.xml
Technical data
General specifications
Detection range 0 ... 400 mm , adjustable
Detection range min. 0 ... 25 mm
Detection range max. 0 ... 400 mm
Light source LED
Light type modulated visible red light 660 nm
Diameter of the light spot approx. 4 mm at a distance of 120 mm
Optical face frontal
Ambient light limit 30000 Lux
Hysteresis H < 15 %
Functional safety related parameters
MTTFd 700 a
Mission Time (TM) 20 a
Diagnostic Coverage (DC) 0 %
Indicators/operating means
Operation indicator LED green, flashes in case of short-circuit
Function indicator LED yellow, lights up with receiver lit
Control elements Detection range adjuster, light/dark switch
Electrical specifications
Operating voltage UB10 ... 30 V DC , class 2
Ripple 10 %
No-load supply current I0< 30 mA
Protection class II , rated voltage ≤ 300 V AC with pollution degree 1-2 according
to IEC 60664-1
Output
Switching type light/dark on, switchable
Signal output Push-pull output, short-circuit protected, reverse polarity protec-
ted
Switching voltage 30 V DC
Switching current max. 200 mA
Switching frequency f 500 Hz
Response time 1 ms
Ambient conditions
Ambient temperature -25 ... 70 °C (-13 ... 158 °F)
Storage temperature -30 ... 70 °C (-22 ... 158 °F)
Mechanical specifications
Degree of protection IP67
Connection M12 connector, 4-pin (Vario-Quick quick connect technology)
Material
Housing brass, nickel-plated
Optical face plastic
Mass 60 g
Compliance with standards and directi-
ves
Standard conformity
Product standard EN 60947-5-2
Approvals and certificates
CE conformity yes
Protection class II, rated voltage ≤ 300 V AC with pollution degree 1-2 accor-
ding to IEC 60664-1
UL approval cULus
CCC approval CCC approval / marking not required for products rated ≤36 V
Germany: +49 621 776 4411Pepperl+Fuchs Group
Refer to “General Notes Relating to Pepperl+Fuchs Product Information”.
USA: +1 330 486 0001 Singapore: +65 6779 9091
www.pepperl-fuchs.com fa-info@us.pepperl-fuchs.com fa-info@sg.pepperl-fuchs.com
fa-info@de.pepperl-fuchs.com
Diffuse mode sensor
VT18-8-400-M/40a/118/128
3
Release date: 2015-02-05 13:57 Date of issue: 2015-02-12 801132_eng.xml
Curves/Diagrams
Distance X [mm]
Offset Y [mm]
Characteristic response curve
0 10050 200150 300250 350 400 450
-15
-10
-5
0
5
10
15
x
y
VT18-8-400
x
VT18-8-400
Distance X [mm]
Stability control
Relative received light strength
white 90 %
grey 18 %
black 6 %
5
10
15
20
25
10050 150 200 250 450
0
0 300 350 400
VT18-8-400
x
white
grey
black
Object colour
Detection ranges
Distance [mm]
0 50 100 150 200 250 300 350 400 450
Germany: +49 621 776 4411Pepperl+Fuchs Group
Refer to “General Notes Relating to Pepperl+Fuchs Product Information”.
USA: +1 330 486 0001 Singapore: +65 6779 9091
www.pepperl-fuchs.com fa-info@us.pepperl-fuchs.com fa-info@sg.pepperl-fuchs.com
fa-info@de.pepperl-fuchs.com
Diffuse mode sensor
VT18-8-400-M/40a/118/128
4
Release date: 2015-02-05 13:57 Date of issue: 2015-02-12 801132_eng.xml
Sensitivity adjustment
• Turn sensitivity adjuster (counterclockwise) to minimum position.
• Place the object to be detected in the sensing range and turn the sensitivity adjuster
clockwise until the yellow indication LED lights up. This setting indicates the position A
of the sensitivity adjuster.
• Remove the object. Increase the sensitivity slowly (turning the sensitivity adjuster
clockwise) until the yellow LED lights up again. This setting indicates the position B of
the sensitivity adjuster.
Note:
In case of no background object, the LED won’t light up, even in MAX. adjustment. In
that case take care, that in normal operation conditions no temporal background object
can appear in the sensing range (e. g. parked pallets). If this can not be excluded,
place (only for adjustment matter) an object at the appropriate location. Then repeat
this adjustment step. After finishing the adjustment this temporal object should be
removed.
• For optimal setting, now turn the sensitivity adjuster to the middle position between the positions A and B.
VT18-8-400
Emission divergence
Distance X [mm]
Light spot diameter [mm]
35
30
25
20
15
10
5
0
0 50 100 150 200 250 300 350 400 450
Adjustment
sensitivity adjusterlight/dark switch
yellow LED
position A position
B
optimal setting
SENS.
DL
