Datasheet

FIBER
SENSORS
LASER
SENSORS
PHOTO-
ELECTRIC
SENSORS
MICRO
PHOTO-
ELECTRIC
SENSORS
AREA
SENSORS
SAFETY
COMPONENTS
PRESSURE
SENSORS
INDUCTIVE
PROXIMITY
SENSORS
PARTICULAR
USE
SENSORS
SENSOR
OPTIONS
WIRE-
SAVING
SYSTEMS
MEASURE-
MENT
SENSORS
STATIC
CONTROL
DEVICES
LASER
MARKERS
PHOTO-
ELECTRIC
SENSORS
Selection
Guide
Amplifier
Built-in
EX-10
CX-400
EX-20
EX-30
EX-40
EQ-30
EQ-500
MQ-W
RX-LS200
RX
CY
PX-2
RT-610
Amplifier-
separated
Power Supply
Built-in
NX5
VF
SU-7 / SH
SS-A5 / SH
Other
Products
EX-20
Amplifi er
Built-in
275
Ultra-compact Photoelectric Sensor EX-20 SERIES
I/O CIRCUIT AND WIRING DIAGRAMS
NPN output type
I/O circuit diagram
Users’ circuitInternal circuit
D
Z
D
Tr
(Brown) +V
(Black) Output (Note)
(Blue) 0 V
Color code
50 mA max.
Load
Sensor circuit
+
–
12 to 24 V DC
± 10 %
Note: The emitter of the thru-beam type sensor does not incorporate the output.
Wiring diagram
Load
Brown
Black (Note)
Blue
Color code
+
–
12 to 24 V DC
± 10 %
Note: The emitter of the thru-beam type sensor does not incorporate the
black wire.
Symbols ... D : Reverse supply polarity protection diode
Z
D
: Surge absorption zener diode
Tr : NPN output transistor
PNP output type
I/O circuit diagram Wiring diagram
Users’ circuitInternal circuit
D
Tr
(Brown) +V
(Black) Output (Note)
(Blue) 0 V
Color code
50 mA max.
Load
Sensor circuit
+
–
12 to 24 V DC
± 10 %
Z
D
Load
Brown
Black (Note)
Blue
Color code
+
–
12 to 24 V DC
± 10 %
Note: The emitter of the thru-beam type sensor does not incorporate the output.
Note: The emitter of the thru-beam type sensor does not incorporate the
black wire.
SENSING CHARACTERISTICS (TYPICAL)
EX-21□ EX-23□ EX-29□ EX-22□
Correlation between setting distance and excess gain
100 50 0 50 100
3.937 1.969 1.969 3.937
0
0.5
1
1.640
3.281
ℓ
L
Receiver
Emitter
Setting distance L (m ft)
Operating point ℓ (mm in)
CenterLeft Right
Receiver
Emitter
1.640
3.281
Setting distance L (m ft)
Operating angle θ ( ° )
θ
40 20 0 20 40
1
0.5
0
L
Left Center Right
20 10 0 10 20
0
100
200
ℓ
L
Receiver
Emitter
Slit on one
side
Slit on both
sides
0.787 0.394 0.394 0.787
3.937
7.874
Setting distance L (mm in)
Operating point ℓ (mm in)
CenterLeft Right
40 20 0 20 40
0
200
400
600
800
ℓ
L
Receiver
Emitter
Slit on one
side
Slit on both
sides
31.496
23.622
15.748
7.874
1.575 0.787 0.787 1.575
Setting distance L (mm in)
Operating point ℓ (mm in)
CenterLeft Right
Symbols ... D : Reverse supply polarity protection diode
Z
D
: Surge absorption zener diode
Tr : PNP output transistor
EX-21□
Thru-beam type
Parallel deviation Angular deviation Parallel deviation with round slit
masks (ø0.5 mm ø0.020 in)
Parallel deviation with rectangular slit
masks (0.5 × 3 mm 0.020 × 0.118 in)
01 345
10
5
100
2
3.281 9.843 13.123 16.4046.562
Excess gain
50
Setting distance L (m ft)
EX-21□
EX-23□
1
0 200 600 800 1,000
10
5
100
400
50
EX-29□
1
10
7.874 23.622 31.496 39.37015.748
Excess gain
Setting distance L (mm in)
0 50 150 200 250
1
10
5
100
100
50
EX-22□
1.969 5.906 7.874 9.8433.937
Excess gain
Setting distance L (mm in)