Omron E3JM-R4M4 Photoelectric Sensor
Omron E3JM-R4M4 is a retro-reflective photoelectric sensor with MSR and a sensing distance of up to 4 m when used with the E39-R1 reflector. A 660 nm red LED establishes the optical path between the sensor and reflector, while the SPDT relay provides the switching interface for compatible machine-control circuits. The sensor accepts 12 to 240 VDC or 24 to 240 VAC and supports selectable Light-ON or Dark-ON operation. ON-delay, OFF-delay, and one-shot timing can also be selected according to the required control sequence. The E3JM-R4M4 belongs to the E3JM Series. Similar reflector-based configurations can be explored under 4 m retro-reflective sensors across the wider range available from Omron Retro-Reflective Sensors.
| Brand | Omron |
| Product | Photoelectric Sensors |
| Model Number | E3JM-R4M4 |
Omron E3JM-R4M4 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 Photoelectric Sensor provides retro-reflective sensing with MSR across a distance of up to 4 m when used with the E39-R1 reflector. A 660 nm red LED establishes the optical path between the sensor and reflector, while the SPDT relay responds when an object changes the returned light. The sensor accepts 12 to 240 VDC or 24 to 240 VAC at 50/60 Hz and uses terminal-block wiring for electrical connection. The specified sensing target is an opaque object with a minimum diameter of 75 mm. Light-ON or Dark-ON operation can be selected, and ON-delay, OFF-delay, or one-shot timing modes provide additional sequence control. Operate or reset time is specified at 30 ms max. The relay supports up to 3 A at 250 VAC under the stated resistive-load condition, while power consumption is specified at 2 W max.
For an Omron MSR retro reflective sensor requiring 4 m sensing and broad AC/DC supply compatibility, the corresponding model is the E3JM-R4M4. Its red LED provides a visible optical path toward the E39-R1 reflector, while MSR supports the specified retro-reflective sensing arrangement. The specification also suits searches for an Omron 4 m photoelectric sensor and Omron relay retro reflective sensor. Operating temperature extends from -25 to 55°C, and selectable timer modes provide additional relay control. For the related E3JM 4 m retro-reflective model with the G designation, see E3JM-R4M4-G.
