Omron E3FB-TP21 Photoelectric Sensor
Omron E3FB-TP21 is a PNP through-beam photoelectric sensor with a sensing distance up to 20 m. The Emitter E3FB-TP21-L transmits red LED light toward the Receiver E3FB-TP21-D, creating a defined optical path across the monitored area. The sensor operates from 10 to 30 VDC and uses M12 connectors for detachable electrical wiring. Current consumption is specified at 25 mA for the emitter and 15 mA for the receiver. Light-ON or Dark-ON operation can be selected according to the required switching sequence, while response time is 0.5 ms. Within the E3FB Series, the E3FB-TP21 provides the PNP connector configuration. Long-distance machine sensing can explore PNP through-beam photoelectric sensors available across Omron Sensing Products.
| Brand | Omron |
| Product | Photoelectric Sensors |
| Model Number | E3FB-TP21 |
Omron E3FB-TP21 Photoelectric Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Sensing Method | Throughbeam |
| Sensing Distance | 20 m |
| Emitter Number | E3FB-TP21-L |
| Receiver Number | E3FB-TP21-D |
| Light Source | Red LED |
| Power Supply Voltage | 10 to 30 VDC |
| Output Configuration | PNP |
| Connection Method | M12 Connector |
| Current Consumption | Emitter: 25 mA Receiver: 15 mA |
| Operation Mode | Light-ON/Dark-ON |
| Response Time | 0.5 ms |
| Degree Of Protection | IP67/IP69K |
| Material | Brass, nickel plated |
The Omron E3FB-TP21 Photoelectric Sensor works with separate emitter and receiver units to establish a through-beam optical path across a sensing distance up to 20 m. The Emitter E3FB-TP21-L sends red LED light toward the Receiver E3FB-TP21-D, while an object crossing the beam changes the PNP output state. Both sensing units operate from 10 to 30 VDC and use M12 connectors for detachable machine wiring. Current consumption is specified at 25 mA for the emitter and 15 mA for the receiver. Light-ON or Dark-ON operation can be selected according to the required control sequence, and response time is 0.5 ms. The M18 metal housings use nickel-plated brass and carry IP67 and IP69K ratings.
For an Omron PNP through-beam photoelectric sensor requiring 20 m sensing and M12 connector wiring, the applicable model is the E3FB-TP21. The detachable electrical interface allows either sensing unit to be replaced while preserving the installed cable arrangement. Its configuration also matches searches for an Omron 20 m through-beam sensor and Omron M12 photoelectric sensor. For a related E3FB through-beam model using NPN output and pre-wired 2 m cables across the same 20 m sensing distance, see E3FB-TN11 2M.
