Omron E3JM-R4M4-US Photoelectric Sensor
Omron E3JM-R4M4-US is a retro-reflective photoelectric sensor with MSR for sensing objects across a distance of up to 4 m using the E39-R1 reflector. A 660 nm red LED sends light toward the reflector and monitors the returned beam to determine the switching state. The SPDT relay is rated up to 3 A at 250 VAC under the stated conditions, while the power input supports 12 to 240 VDC or 24 to 240 VAC. Light-ON or Dark-ON operation can be selected, and timer modes support different switching sequences. The E3JM-R4M4-US belongs to the E3JM Series. Similar reflector-based relay models can be explored under AC DC retro-reflective sensors across the wider sensing range from Omron Industrial Sensing Products.
| Brand | Omron |
| Product | Photoelectric Sensors |
| Model Number | E3JM-R4M4-US |
Omron E3JM-R4M4-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 | 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-R4M4-US Photoelectric Sensor provides retro-reflective sensing with MSR across a maximum distance of 4 m when used with the E39-R1 reflector. A 660 nm red LED establishes the optical path, and the SPDT relay changes state according to the returned light condition. The relay supports up to 3 A at 250 VAC under the specified resistive-load condition. Supply compatibility covers 12 to 240 VDC and 24 to 240 VAC at 50/60 Hz, while terminal-block wiring provides the electrical interface. Light-ON or Dark-ON operation can be selected, and ON-delay, OFF-delay, or one-shot modes provide additional switching control. Operate or reset time is specified at 30 ms max., power consumption is 2 W max., and the stated sensing target is an opaque object with a minimum diameter of 75 mm.
For an Omron relay retro reflective photoelectric sensor requiring 4 m sensing, MSR, and broad AC/DC input compatibility, the corresponding model is the E3JM-R4M4-US. Its 660 nm red LED supports reflector alignment, while selectable timer modes allow the relay sequence to be adjusted according to the application. The specification also suits searches for an Omron 4 m MSR sensor and Omron AC DC relay sensor. Operating temperature extends from -25 to 55°C. For the related standard E3JM 4 m MSR retro-reflective configuration, see E3JM-R4M4.
