1. General Overview & Models

️· Product: E3JK Photoelectric Sensor
️· Types: The data covers Through-beam, Retroreflective, and Diffuse-reflective models.
️· Model Naming: E3JK followed by a suffix that indicates variations in output, timing, and features (e.g., E3JK-5M1, E3JK-R2S3).
️· Purpose: Used for object detection and sensing.
️· Accessories: Mounting brackets, reflector (for retroreflective models), instruction manual

2. Technical Specifications (Shared Across Models)

️· Protective Structure: IEC60529 IP64 (dust and water resistant)
️· Connection Method: Pre-wired models (standard length: 2 m)
️· Weight (Packed): Approximately 420g (Through-beam & Retroreflective), Approximately 250g (Diffuse-reflective)
️· Materials:
- Case: ABS
- Lens: Acrylics
- Mounting Bracket: Steel
️· Operating Voltage: Can vary, 24-240 VAC or 12-240 VDC are mentioned.
️· Note: The output stage leakage currents are 0.1 mA max.

3. Model-Specific Outputs & Circuits

This is the most complex section, detailing different output types:

️· Relay Output (e.g., E3JK-5M1, E3JK-R2M2, E3JK-R4M2, E3JK-DS30M2):
- "Light indicator (red)" - likely a status LED.
- L-ON (Ta) - Light ON mode
- D-ON (Ta) - Dark ON mode
- Includes a built-in relay (G6C).
- Wiring: Power source, Main circuit (Polarity Optional), 24 to 240 VAC, 12 to 240 VDC, White, Brown, Blue, Black, Contact output.
️· DC Transistor Output (e.g., E3JK-5S3, E3JK-R2S3, E3JK-R4S3, E3JK-DS30S3):
- Similar L-ON and D-ON modes.
- Wiring: Power source, Main circuit, Load, Gray (D-ON), Black (L-ON), Drive circuit.
️· Specialized DC Transistor Output (E3JK-R2R3):
- Designed for specific load requirements.
- Notes: Connect to brown and blue on the emitter side. Output Stage limitation: I1 + I2 < 100 mA

4. Performance Characteristics (Illustrative Diagrams)

️· Excess Gain Ratio vs. Setting Distance:
- Shows how the sensor's gain changes with distance for Through-beam, Retroreflective, and Diffuse-reflective models.
- Used to set appropriate distance for best sensor performance.
- Includes diagrams with various distance ranges (0-5m) and corresponding gain values.

5. Diagrams and Wiring

️· Output Circuit Diagrams: Detailed illustrations showing the electrical connections for the different output types (Relay and DC Transistor). These diagrams specify wire colors and connection points.

Key Takeaways & Cautions:

️· Careful Model Selection: The E3JK family offers multiple models with different output types and performance characteristics. Selecting the correct model for your application is critical.
️· Wiring Diagrams: Refer to the output circuit diagrams *very* carefully when wiring the sensor. Incorrect wiring can damage the sensor or the connected load.
️· Load Limits: The DC Transistor Output (especially the E3JK-R2R3 variant) has load limits. Exceeding these limits can damage the sensor.
️· Setting Distance: Adjust the sensor's setting distance to optimize performance. The diagrams show the relationship between distance and gain.
️· Polarity: Some models indicate "Polarity Optional" for the main circuit.