Omron E3JM-R4M4T-US Photoelectric Sensor
Omron E3JM-R4M4T-US is a retro-reflective photoelectric sensor with an MSR function for sensing opaque targets across a maximum distance of 4 m with the E39-R1 reflector. A 660 nm red LED forms the sensing path, while the SPDT relay output supports compatible control circuitry. Light-ON or Dark-ON operation can be selected, and the adjustable timer provides settings from 0.1 to 5 s. The sensor operates from 12 to 240 VDC or 24 to 240 VAC and uses a terminal-block connection. Its response time is specified at 30 ms. Within the E3JM Series, the E3JM-R4M4T-US provides the US relay version. Related retro-reflective relay sensors can be compared across Omron Industrial Sensors.
| Brand | Omron |
| Product | Photoelectric Sensors |
| Model Number | E3JM-R4M4T-US |
Omron E3JM-R4M4T-US 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 | Relay |
| Connection Method | Terminal block |
| Control Output | SPDT, 250 VAC, 3A (cosφ=1) max., 5 VDC, 10 mA min. |
| Operation Mode | Light-ON Dark-ON (switch selectable) |
| Response Time | Operate or reset: 30 ms max. |
| Timer Function | Delay time: 0.1 to 5 s (adjustable) |
| 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-R4M4T-US Photoelectric Sensor uses retro-reflective sensing with an MSR function across a maximum distance of 4 m when used with the E39-R1 reflector. Its 660 nm red LED creates the optical path, while the SPDT relay output supports switching up to 250 VAC at 3 A under the specified resistive-load condition. The sensor accepts 12 to 240 VDC or 24 to 240 VAC and supports selectable Light-ON or Dark-ON operation. A terminal block provides the electrical interface, and the adjustable timer supports settings from 0.1 to 5 s. Operate or reset time is specified at 30 ms maximum, while maximum power consumption is 2 W. Incandescent-light resistance is listed at 3,000 lx.
For an Omron retro-reflective photoelectric sensor requiring a 4 m range and US relay configuration, the relevant model is the E3JM-R4M4T-US. Operating temperature extends from -25 to 55°C, with storage from -30 to 70°C without icing or condensation. The listed materials include ABS, methacrylic resin, polycarbonate, and iron. Insulation resistance is specified at 20 MΩ minimum at 500 VDC, while dielectric strength is 2,000 VAC for one minute. Its specification also aligns with searches for an Omron SPDT photoelectric sensor and Omron timer photoelectric sensor. For the related G version in the same E3JM 4 m relay group, see the E3JM-R4M4T-G. Selectable switching logic and adjustable timing support object sensing, movement monitoring, and control sequences requiring a delayed relay response.
