MTL4511 Single-Channel Switch/Proximity Detector Interface Isolator (Eaton)

1. Product Certifications

• Complies with standards GB/T 3836.1-2021 and GB/T 3836.4-2021 (Chinese national standards for explosive atmospheres).
• Certified to CNCA-C23-01:2019 Implementation Rules for Compulsory Product Certification - Explosion-Proof Electrical Equipment (mandatory certification for explosion-proof electrical products in China).

2. Number of Channels

3. Application Areas

• Switch Installation Location: Suitable for hazardous areas of Zone 0, IIC, T6 (Zone 0: continuous/long-term presence of explosive gas mixtures; IIC: high-level explosion risk for gas groups; T6: highest temperature class, up to 85°C surface temperature).
• Proximity Detector Installation Location: Suitable for hazardous areas of Zone 0, IIC, T4-T6 (if properly certified), as well as Div.1, Group A hazardous locations (Div.1: explosive mixtures may exist under normal operating conditions; Group A: highest risk for flammable gases like acetylene).

4. Hazardous Area Input

• Input compatibility: Supports proximity switches (NAMUR type) conforming to the BS EN 60947-5-6:2001 standard (NAMUR is a common specification for sensors in explosive environments).
• Sensor voltage supply: Provides 7-9V DC voltage through a 1kΩ±10% resistor (powers the field proximity switch).

5. Input/Output Characteristics

• Phase: Normal phase.
• Switching logic:
  • Output closes when input current > 2.1mA (input circuit resistance < 2kΩ).
  • Output opens when input current < 1.2mA (input circuit resistance > 10kΩ).
• Hysteresis: Nominal 200µA (equivalent to 650Ω, prevents frequent switching due to minor signal fluctuations).

6. Line Fault Detection (LFD)

• Selection: Users can enable/disable or configure LFD via a switch on the side of the device.
• Fault response: When an input line fault is detected, the channel’s output relay de-energizes, and the LED indicator illuminates (for visual fault alerts).
• Fault thresholds:
  • Open-circuit alarm: Activates when input current < 50µA; deactivates when > 250µA.
  • Short-circuit alarm: Activates when input resistance < 100Ω; deactivates when > 360Ω.

7. Safe Area Output

• Output type: Relay output.
• Contact rating:
  • 10W, 0.5A at 35V DC;
  • 2A at 250V AC (with power factor cosø > 0.7);
  • 2A at 40V DC (resistive load).

8. Response Time

9. Power Supply

• Voltage range: 20-35V DC.
• Current consumption: Maximum 25mA at 24V DC (low power consumption for system efficiency).

10. Weight

11. Other Features

• Phase inversion: A switch on the module’s side allows users to select channel phase inversion (adapts to different control system logic requirements).
• Functional safety: These operating modes have been evaluated and are suitable for IEC 61508 functional safety applications (ensures reliability in safety-critical systems).