Omron E3JM-R4M4-G Photoelectric Sensor
Omron E3JM-R4M4-G provides retro-reflective sensing with MSR over a distance of up to 4 m when used with the E39-R1 reflector. Its 660 nm red LED creates the optical path, while the SPDT relay supplies the switching state to compatible industrial control circuitry. The sensor operates from 12 to 240 VDC or 24 to 240 VAC at 50/60 Hz, allowing use with different machine power arrangements. Light-ON or Dark-ON operation can be selected, while ON-delay, OFF-delay, and one-shot modes provide timing flexibility. Terminal-block wiring supports the electrical connection. The E3JM-R4M4-G is part of the E3JM Series. Related reflector models can be reviewed under MSR photoelectric sensors across the wider range supplied through Omron Sensors.
| Brand | Omron |
| Product | Photoelectric Sensors |
| Model Number | E3JM-R4M4-G |
Omron E3JM-R4M4-G 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-G Photoelectric Sensor uses retro-reflective sensing with MSR over a maximum distance of 4 m when used with the E39-R1 reflector. Its 660 nm red LED establishes the optical path, while an SPDT relay provides switching for compatible machine-control circuits. The sensor supports 12 to 240 VDC and 24 to 240 VAC at 50/60 Hz, allowing operation with different control-power systems. The specified target is an opaque object with a minimum diameter of 75 mm. Light-ON or Dark-ON operation can be selected, while ON-delay, OFF-delay, and one-shot modes provide timing control. Terminal-block wiring provides the electrical connection. Operate or reset time is specified at 30 ms max., and relay capacity reaches 3 A at 250 VAC under the stated resistive-load condition. Power consumption is specified at 2 W max.
For an Omron AC DC retro reflective sensor requiring 4 m sensing, MSR, relay output, and selectable timing modes, the corresponding model is the E3JM-R4M4-G. Its visible red optical path supports reflector alignment, while the broad power range allows installation with different machine supplies. The specification also suits searches for an Omron 4 m relay sensor and Omron MSR photoelectric sensor. Operating temperature extends from -25 to 55°C. For a related E3JM timer variant from the same 4 m retro-reflective group, see E3JM-R4M4T-G.
