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
271
Ultra-compact Photoelectric Sensor EX-20 SERIES
ORDER GUIDE
Type Appearance Sensing range
Model No.
(Note 3)
Output Output operation
Thru-beam
Front sensing
1 m
3.281 ft
EX-21A
NPN open-collector transistor
Light-ON
EX-21A-PN
PNP open-collector transistor
EX-21B
NPN open-collector transistor
Dark-ON
EX-21B-PN
PNP open-collector transistor
Side sensing
2 m
6.562 ft
EX-23
NPN open-collector transistor
Switchable either
Light-ON or
Dark-ON
EX-23-PN
PNP open-collector transistor
Retrorefl ective
Side sensing
30 to 200 mm
1.181 to 7.874 in
(Note 1)
EX-29A
NPN open-collector transistor
Light-ON
EX-29A-PN
PNP open-collector transistor
EX-29B
NPN open-collector transistor
Dark-ON
EX-29B-PN
PNP open-collector transistor
Diffuse refl ective
Side sensing
5 to 160 mm
0.197 to 6.299 in
(Note 2)
EX-22A
NPN open-collector transistor
Light-ON
EX-22A-PN
PNP open-collector transistor
EX-22B
NPN open-collector transistor
Dark-ON
EX-22B-PN
PNP open-collector transistor
Convergent refl ective
Diffused beam type
Front sensing
2 to 25 mm
0.079 to 0.984 in
(Convergent point: 10 mm 0.394 in)
EX-24A
NPN open-collector transistor
Light-ON
EX-24A-PN
PNP open-collector transistor
EX-24B
NPN open-collector transistor
Dark-ON
EX-24B-PN
PNP open-collector transistor
Small spot beam type
Side sensing
6 to 14 mm
0.236 to 0.551 in
(Convergent point: 10 mm 0.394 in)
EX-26A
NPN open-collector transistor
Light-ON
EX-26A-PN
PNP open-collector transistor
EX-26B
NPN open-collector transistor
Dark-ON
EX-26B-PN
PNP open-collector transistor
Narrow-view refl ective
Long distance spot beam type
Side sensing
45 to 115 mm
1.772 to 4.528 in
EX-28A
NPN open-collector transistor
Light-ON
EX-28A-PN
PNP open-collector transistor
EX-28B
NPN open-collector transistor
Dark-ON
EX-28B-PN
PNP open-collector transistor
NOTE: Mounting bracket is not supplied with the sensor. Please select from the range of optional sensor mounting brackets
(four types) or universal sensor mounting bracket (for EX-23□ only). (Refer to p.273)
Notes: 1) The sensing range of the retrorefl ective type sensor is specifi ed for the RF-200 refl ector.
Further, the sensing range is the possible setting range for the refl ector.
The sensor can detect an object less than 30 mm
1.181 in away.
However, if the refl ector is set 100 mm 3.937 in or less away, the sensing object should be
opaque.
2) In case of using this product at a sensing range of 50 mm
1.969 in or less, take care that the
sensitivity adjustment range becomes extremely narrow.
3) The model No. with suffi x “P” shown on the label affi xed to the thru-beam type sensor is the
emitter, “D” shown on the label is the receiver.
(e.g.) Emitter of EX-21A: EX-21P, Receiver of EX-21A: EX-21AD
Sensor ReflectorReflector
Actual sensing range
of the sensor
Setting range
of the reflector
Reflector cannot
be placed
in this range
30 mm 1.181 in
200 mm
7.874 in