Omron E3JM-R4S4 Photoelectric Sensor
Omron E3JM-R4S4 is a retro-reflective photoelectric sensor with an MSR function for sensing opaque targets up to 4 m when used with the E39-R1 reflector. Its 660 nm red LED establishes the optical path, while the DC SSR output supports switching up to 48 VDC and 100 mA. Light-ON or Dark-ON operation can be selected to suit the required control logic. Timer options include ON-delay, OFF-delay, and one-shot delay, while the response time is specified at 5 ms. The sensor accepts 12 to 240 VDC or 24 to 240 VAC and uses terminal-block wiring. Within the E3JM Series, the E3JM-R4S4 provides the solid-state output option. Related SSR output photoelectric sensors are available across Omron Automation Sensors.
| Brand | Omron |
| Product | Photoelectric Sensors |
| Model Number | E3JM-R4S4 |
Omron E3JM-R4S4 Photoelectric Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Sensing Method | Retroreflective with MSR function |
| Sensing Distance | 4 m (When using E39-R1) |
| Standard Sensing Object | Opaque: 75-mm dia. min. |
| Light Source | Red LED (660 nm) |
| Power Supply Voltage | 12 to 240 VDC, ripple (p-p): 10% max. 24 to 240 VAC, 50/60 Hz |
| Output Configuration | DC SSR |
| Connection Method | Terminal block |
| Control Output | 48 VDC, 100 mA max. (residual voltage: 2 V max.) |
| Operation Mode | Light-ON Dark-ON (switch selectable) |
| Response Time | Operate or reset: 5 ms max. |
| Timer Function | ON-delay/OFF-delay/One-shot delay switch selectable |
| Ambient Illumination | Incandescent lamp: 3,000 lx max. |
| Ambient Temperature Range | Operating: −25°C to 55°C, Storage: −30°C to 70°C (with no icing or condensation) |
| Ambient Humidity Range | Operating: 45% to 85% (with no condensation), Storage: 35% to 95% (with no condensation) |
| Insulation Resistance | 20 MΩ min. at 500 VDC |
| Dielectric Strength | 2,000 VAC, 50/60 Hz for 1 min. |
| Vibration Resistance | 10 to 55 Hz, 1.5-mm double amplitude for 2 hours each in X, Y, and Z directions |
| Shock Resistance | 500 m/s2 3 times each in X, Y, and Z directions, 100 m/s2 3 times each in X, Y, and Z directions |
| Degree Of Protection | IEC 60529: IP66 |
| Material | ABS (Acrylonitril Butadiene Styrene), Methacrylic resin, Polycarbonate, Iron |
| Weight | Approx. 160 g |
The Omron E3JM-R4S4 Photoelectric Sensor uses retro-reflective sensing with an MSR function for opaque targets across a maximum distance of 4 m when used with the E39-R1 reflector. A 660 nm red LED provides the optical source, while the DC SSR output supports up to 48 VDC and 100 mA with residual voltage specified at 2 V maximum. The sensor operates from 12 to 240 VDC or 24 to 240 VAC and provides selectable Light-ON or Dark-ON operation. Timer selections include ON-delay, OFF-delay, and one-shot delay. The terminal block provides the electrical connection, while operate or reset time is specified at 5 ms maximum. Maximum power consumption is 2 W, and incandescent-light resistance is listed at 3,000 lx.
For an Omron retro-reflective sensor requiring a solid-state output instead of a relay, the applicable model is the E3JM-R4S4. Operating temperature extends from -25 to 55°C, while storage is specified from -30 to 70°C without icing or condensation. Listed materials include ABS, methacrylic resin, polycarbonate, and iron. Insulation resistance is 20 MΩ minimum at 500 VDC, with dielectric strength specified at 2,000 VAC for one minute. The specification also fits searches for an Omron DC SSR photoelectric sensor and Omron 4 m photoelectric sensor. For a related version using an SPDT relay output with adjustable 0.1 to 5 s timing, see the E3JM-R4M4T. Its 5 ms response supports machine sequences where quicker solid-state switching is preferred.
