Omron E3RA-TP21 Photoelectric Sensor
Omron E3RA-TP21 is a PNP through-beam photoelectric sensor designed for object sensing across a distance of up to 15 m. The E3RA-TP21-L emitter sends 624 nm red LED light toward the E3RA-TP21-D receiver, creating an optical path across the monitored area. The sensor operates from 10 to 30 VDC and provides a PNP output for compatible PLC inputs and machine-control circuitry. Light-ON or Dark-ON operation can be selected by wiring, while the stated response time is 0.5 ms. An M12 connector provides detachable electrical connection. Within the E3RA Series, the E3RA-TP21 provides the long-distance through-beam configuration. Related 15 m through-beam sensors can be explored across Omron Sensor Products.
| Brand | Omron |
| Product | Photoelectric Sensors |
| Model Number | E3RA-TP21 |
Omron E3RA-TP21 Photoelectric Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Sensing Method | Through-beam |
| Sensing Distance | 15 m |
| Standard Sensing Object | Opaque: 7 mm dia.min. |
| Light Source | Red LED (624 nm) |
| Power Supply Voltage | 10 to 30 VDC (include voltage ripple of 10%(p-p) max.) |
| Output Configuration | PNP |
| Connection Method | M12 Connector |
| Current Consumption | 40mA max. |
| Control Output | Load current: 100 mA max. (Residual voltage: 2 V max.), Load power supply voltage: 30 VDC max. |
| Operation Mode | Light-ON/Dark-ON selectable by wiring |
| Response Time | 0.5 ms |
| Sensitivity Adjustment | One-turn adjuster |
| Indicators | Operation indicator (orange) Stability indicator (green) |
| Ambient Illumination | Incandescent lamp: 3,000 lx max./ Sunlight: 10,000 lx max. |
| Ambient Temperature Range | Operating: -25 to 55°C/ Storage: -40 to 70°C (with no icing or condensation) |
| Ambient Humidity Range | Operating: 35 to 85%/ Storage: 35 to 95% (with no condensation) |
| Insulation Resistance | 20 MΩ min. at 500 VDC |
| Dielectric Strength | 1,000 VAC at 50/60 Hz for 1 min. between current-carrying parts and case |
| Vibration Resistance | Destruction: 10 to 55 Hz, 1.5 mm double amplitude for 2 hours each in X, Y and Z directions |
| Shock Resistance | Destruction: 500 m/s2 3 times each in X, Y and Z directions |
| Protection Circuits | Power supply reverse polarity protection, Output short-circuit protection, and Output reverse polarity protection |
| Degree Of Protection | IEC: IP67, DIN 40050-9: IP69K |
| Material | ABS, PMMA, POM, POM |
| Weight | Approx. 20 g/ Approx. 10 g |
The Omron E3RA-TP21 Photoelectric Sensor uses through-beam sensing across a maximum distance of 15 m. The E3RA-TP21-L emitter sends 624 nm red LED light toward the E3RA-TP21-D receiver, establishing the optical path across the sensing area. When an object enters this path, the receiver changes the resulting PNP output state. The sensor operates from 10 to 30 VDC and has total current consumption specified at 40 mA maximum. Load current is rated up to 100 mA with a maximum load supply voltage of 30 VDC. Light-ON or Dark-ON operation can be selected by wiring, while a one-turn adjuster supports setup. Response time is 0.5 ms, and the M12 connector provides detachable electrical connection.
For an Omron PNP through beam photoelectric sensor requiring a 15 m sensing distance and M12 connection, the corresponding model is the E3RA-TP21. The stated sensing target is an opaque object with a minimum diameter of 7 mm. Operating temperature extends from -25 to 55°C, while storage ranges from -40 to 70°C without icing or condensation. Ambient-light resistance reaches 3,000 lx under incandescent light and 10,000 lx under sunlight. Power-supply reverse polarity, output short-circuit, and output reverse-polarity protection are listed. Its specification also fits searches for an Omron 15 m through beam sensor and Omron PNP emitter receiver sensor. For a related E3RA PNP model using retro-reflective sensing with MSR, see E3RA-RP21.
