Omron EE-SPW421 Photomicrosensor
Omron EE-SPW421 is a pre-wired through-beam photomicrosensor specified for sensing across a 300 mm optical path. A target entering the beam changes the receiving condition, allowing the NPN output to communicate the switching state to compatible industrial control circuitry. Light-ON operation determines the required output sequence. The sensor operates from 12 to 24 VDC, draws an average current of 30 mA, and provides a 1 ms maximum response time. Its 2 m pre-wired connection includes a 0.5 m cable between the emitter and amplifier, while red indicators are provided on both sections. The EE-SPW421 offers fixed wiring within the 300 mm Light-ON sensor range across Omron Pre-Wired Photomicrosensors.
| Brand | Omron |
| Product | Photomicro Sensors |
| Model Number | EE-SPW421 |
Omron EE-SPW421 Photomicrosensor – Technical Specifications
| Specification | Value |
|---|---|
| Sensing Method | Through-beam type |
| Sensing Distance | 300 mm |
| Power Supply Voltage | 12 to 24 VDC |
| Control Output (Output Type) | NPN |
| Connection Method | Pre-wired models |
| Cable Length | 2 m (Cable length from emitter to amplifier: 0.5 m) |
| Current Consumption | Average value: 30 mA |
| Operation Mode | Light-ON |
| Response Time | Operate or reset: 1 ms max. |
| Control Output (Residual Voltage) | at 100 mA load current: 1 V max. |
| Control Output (Load Current) | 100 mA max. |
| Indicator | Light indicator (red LEDs on Sensor and Amplifier) |
| Ambient Temperature (Operating) | -20 to 55 ℃ |
| Ambient Humidity (Operating) | 5 to 85 % |
| Vibration Resistance | Destruction: 10 to 55 Hz, 1.5 mm double amplitude each in X, Y, and Z directions for 2 h |
| Shock Resistance | Destruction: 500 m/s2 |
| Degree Of Protection | IP64 |
| Material | Case: ABS resin Lens: Acrylic resin |
The Omron EE-SPW421 Photomicrosensor uses a 300 mm through-beam optical path with Light-ON switching. When a target changes the beam condition, the NPN output communicates the resulting state to compatible control circuitry. The sensor operates from 12 to 24 VDC and consumes an average of 30 mA. Operate or reset time is specified at 1 ms maximum, while the output supports a 100 mA maximum load with residual voltage of 1 V maximum at that current. A 2 m pre-wired cable provides the main electrical connection, and the emitter-to-amplifier section measures 0.5 m. Red indicators are provided on both the sensing unit and amplifier. The supplied arrangement therefore integrates fixed wiring and an amplifier into a compact through-beam format.
For an Omron Light-ON photomicrosensor requiring pre-wired 300 mm sensing, the relevant model is the EE-SPW421. Operating temperature is specified from -20 to 55°C, with operating humidity from 5% to 85%. ABS resin is listed for the case and acrylic resin for the lens. The 1 ms response supports quick changes at the control output as the beam condition varies. Compared with the EE-SPW321, the main functional distinction is the switching behavior: this model uses Light-ON, while the related model uses Dark-ON. Both provide a similar amplified, pre-wired installation format. For the corresponding Dark-ON version, see EE-SPW321.
