1. Overview:

️· Two Sensor Series: The document covers two product lines: the E3JM and the E3JK. They appear to be quite similar in many aspects but have differences in their features and application.
️· Sensor Types: The sensors are designed for various applications, including:
- Through-beam: (E3JM-@@M4(T) - for long distances)
- Retro-reflective: (E3JM-@@M4(T) model, with included reflector)
- Diffuse (Background Suppression): (E3JM-@@S4(T) Model)

2. Common Features (E3JM and E3JK):

️· Protection: IP66 rated (dust-tight and protected against strong water jets).
️· Connection: Terminal block connections.
️· Case Material: ABS (Acrylonitrile Butadiene Styrene) for the case, Polycarbonate for the cover, Methacrylic resin for the lens.
️· Mounting Bracket: Iron (with screws).
️· Accessories: Each sensor comes with a mounting bracket, nuts, terminal protection cover, cable connection nuts, and an instruction manual. Retro-reflective sensors come with a reflector (E39-R1).
️· Weight: Roughly 270g (E3JM) and 160g (E3JK).
️· Operating Temperature: -25°C to 55°C, Storage: -30°C to 70°C.
️· Vibration and Shock Resistance: Specifications are detailed for both destruction and malfunction scenarios.
️· Insulation Resistance: 20 MΩ min. at 500 VDC.
️· Dielectric Strength: 2,000 VAC, 50/60 Hz for 1 min.

3. E3JM Specifics:

️· Longer Range (Through-beam): Primarily intended for longer detection distances when used in a through-beam configuration.
️· Control Outputs:
- Relay Output (E3JM-@@M4 (T)): SPDT, 250 VAC, 3A, 5 VDC, 10 mA.
- DC SSR Output (E3JM-@@S4 (T)): 48 VDC, 100 mA (residual voltage 2V max).
- Light-ON/Dark-ON selectable.
️· Timer Function (E3JM-@@@4T): On-delay/Off-delay/One-shot delay switch selectable. Delay time adjustable from 0.1 to 5 seconds. *Timer cannot be disabled*.
️· Ambient Illumination: Can tolerate up to 3000 lx (incandescent lamp) on the receiver side.
️· Sensitivity Adjustment: One-turn adjuster.

4. E3JK Specifics:

️· Diffuse Mode Sensor: Intended primarily for diffuse (background suppression) sensing.
️· Control Outputs:
- Relay Output (E3JK-@@M4 (T)): Same as E3JM.
- DC SSR Output (E3JK-@@S4 (T)): Same as E3JM.
- Light-ON/Dark-ON selectable.
️· Timer Function (E3JK-@@@4T): Same as E3JM. *Timer cannot be disabled*.
️· Sensitivity Adjustment: One-turn adjuster.

Key Differences Summary Table:

Feature	E3JM	E3JK
Primary Application	Through-beam, Retro-reflective	Diffuse/Background Suppression
Range	Longer range (Through-beam)	Shorter range (Diffuse)
Specific Features	Timer functionality