MTL MTL4511 Switch Proximity Detector Interface

The MTL4511 Switch Proximity Detector Interface Safety Module is designed for reliable control of safe-area loads using proximity detectors or switches located in hazardous environments. This module offers a robust design suitable for Zone 0 and Div.1 hazardous locations, ensuring operational safety in challenging applications. It features user-selectable line fault detection, comprehensive monitoring through LED indicators, and a compact form factor for easy installation. Ideal for applications in chemical processing, oil and gas industries, and other sectors requiring strict safety compliance.

General Info

• Manufacturer: Eaton Electric Limited
• Model Number: MTL4511
• Type: Switch Proximity Detector Interface Safety Module
• Number of Channels: One
• Output Signal Type: Relay output
• Compatibility: Suitable for proximity detectors conforming to BS EN60947–5–6:2001 standards (NAMUR)
• Weight: [Weight to be specified if known]

Features

The MTL4511 offers numerous advantages, including:

• Single Channel Operation: The MTL4511 facilitates straightforward integration into existing systems, allowing for efficient control of loads in hazardous locations while adhering to safety regulations.
• User-Selectable Line Fault Detection: This feature enhances safety by providing real-time alerts for line faults through LED indicators, ensuring proactive maintenance and minimizing potential downtime.
• Versatile Voltage Range: The device operates effectively within a voltage supply range of 20 to 35V DC, making it compatible with various proximity detectors and adaptable to different installations.
• High Safety Standards: Certified for use in Zone 0, IIC, T4–6 hazardous areas, the MTL4511 complies with stringent safety regulations, making it ideal for high-risk environments in industries such as chemical and oil and gas.
• Robust Relay Characteristics: Equipped with a single pole relay with changeover contacts, the MTL4511 guarantees reliable operation in both safe and hazardous areas, ensuring consistent performance under various conditions.

Technical Specifications

Electrical Specifications

• Supply Voltage: 20 to 35V DC
• Voltage Applied to Sensor: 7 to 9V DC from 1kΩ ±10%
• Maximum Current Consumption: 25mA at 24V DC
• Output Rating (Safe Area):
  • 10W, 0.5A at 35V DC
  • 250V AC, 2A (cosØ >0.7)
  • 40V DC, 2A resistive load

Input Specifications

• Hazardous Area Inputs: Inputs conforming to BS EN60947–5–6:2001 standards for proximity detectors (NAMUR)

Input/Output Characteristics

• Normal Phase:
  • Outputs Closed if Input: > 2.1mA (< 2kΩ in input circuit)
  • Outputs Open if Input: < 1.2mA (> 10kΩ in input circuit)
• Hysteresis: 200µA (650Ω) nominal

Line Fault Detection (LFD)

• User-Selectable: Via switches on the side of the unit
• LED Indicators: Line faults are indicated by an LED

Open-Circuit Alarm

• On: if Iin < 50µA
• Off: if Iin > 250µA

Short-Circuit Alarm

• On: if Rin < 100Ω
• Off: if Rin > 360Ω

Required Resistors for LFD

• 500Ω to 1kΩ in series with switch
• 20kΩ to 25kΩ in parallel with switch

Output Specifications

• Channel: Single pole relay with changeover contacts

Relay Characteristics

• Response Time: 10ms maximum
• Contact Rating (Safe Area):
  • 10W, 0.5A, 35V DC
  • 250V AC, 2A, cosØ >0.7, 40V DC, 2A resistive load
• Contact Rating (Zone 2):
  • 10W, 0.5A, 35V DC
  • 35V, 2A, 100VA

LED Indicators

• Green: Power indication
• Yellow: Channel status (on when output energized)
• Red: LFD indication (on when line fault detected)

Safety Description

• Safety Parameters:
  • Uo: 10.5V
  • Io: 14mA
  • Po: 37mW
  • Um: 253V RMS or DC

SIL Capability

• SIL2 Capable: for a single device (HFT=0)
• SIL3 Capable: for multiple devices in safety redundant configurations (HFT=1)