Ultra-compact Photoelectric Sensor EX-20 (Panasonic)
Miniature-sized and still mountable with M3 screws
The beam-receiving photodiode and the A/D conversion circuit have been fabricated on a single chip optical IC (full custom). Hence, in spite of its miniature size, it has a performance and reliability which is equal to or better than the conventional product.
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 | ||||||
| Retroreflective | 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 reflective | 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 reflective | 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 reflective | 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. |
|---|
| Note 1 : | The sensing range of the retroreflective type sensor is specified for the RF-200 reflector. Further, the sensing range is the possible setting range for the reflector. The sensor can detect an object less than 30 mm 1.181 in away. However, if the reflector is set 100 mm 3.937 in or less away, the sensing object should be opaque.  |
|---|---|
| Note 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. |
| Note 3 : | The model No. with “P” shown on the label affixed 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 |
Package without reflector
Retroreflective type is also available without the reflector RF-200.
When ordering this type, suffix “-Y” to the model No.
(e.g.) Without reflector type of EX-29A-PN is “EX-29A-PN-Y”.
| Standard type | Package without reflector |
|---|---|
| EX-29A | EX-29A-Y |
| EX-29A-PN | EX-29A-PN-Y |
| EX-29B | EX-29B-Y |
| EX-29B-PN | EX-29B-PN-Y |
5 m 16.404 ft cable length type
5 m 16.404 ft cable length type (standard: 2 m 6.562 ft) is also available for NPN output type (including package without reflector of retroreflective type sensor).
When ordering this type, suffix “-C5” to the model No.
(e.g.) 5 m 16.404 ft cable length type of EX-29A-Y is “EX-29A-Y-C5”.
| Standard type | 5 m 16.404 ft cable length type |
|---|---|
| EX-21A | EX-21A-C5 |
| EX-21B | EX-21B-C5 |
| EX-23 | EX-23-C5 |
| EX-29A | EX-29A-C5 |
| EX-29B | EX-29B-C5 |
| EX-29A-Y | EX-29A-Y-C5 |
| EX-29B-Y | EX-29B-Y-C5 |
| EX-22A | EX-22A-C5 |
| EX-22B | EX-22B-C5 |
| EX-24A | EX-24A-C5 |
| EX-24B | EX-24B-C5 |
| EX-26A | EX-26A-C5 |
| EX-26B | EX-26B-C5 |
| EX-28A | EX-28A-C5 |
| EX-28B | EX-28B-C5 |
Accessory
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