MTL4573 Temperature Transmitter Hazardous Area Signal Conversion

MTL4573 Smart Temperature Transmitter: Convert Hazardous-Area Signals to 4-20mA Safely

Key Specifications

• Brand/Model: MTL MTL4573 Signal Converter
• Input Types:
  • Thermocouples: 3mV min span
  • RTDs: 10-100Ω span (Pt100, Cu50, Ni100)
  • mV Range: -75 to +75mV
• Accuracy:
  • ±15μV or ±0.05% (thermocouples)
  • ±80mΩ (RTDs)
• Output: 4-20mA into 600Ω max
• Response Time: 500ms typical
• Noise Rejection:
  • 120dB common mode
  • 40dB series mode
• RTD Excitation: 200μA constant current

Critical Safety Features

• Zone 0, IIC Certified for hazardous areas
• Division 1, Groups A-D compliant
• Early Burnout Detection for thermocouples (>50Ω change)
• Automatic sensor failure response (upscale/downscale/off)

Configuration & Setup

• Easy PC configuration with MTL PCS45 software
• Integral CJC sensor for thermocouples (terminals 1-3)
• Simple mounting in safe-area enclosures

Visual Diagnostics

• Dual LED indicators:
  • Green: Power/Early Burnout Detection
  • Yellow: General alarms
• Real-time monitoring of all functions

Performance Advantages

• ≤1.0°C compensation error at cold junction
• Low temperature drift: ±0.003%/°C
• Supports NAMUR NE43 out-of-range signaling
• Minimal power use: 1.2W at 24V

Package & Support

• Includes: MTL4573 unit, HAZ-CJC plug
• 12-month warranty
• Global shipping: FedEx, UPS, DHL options

Expert FAQs

• Q: Can I use custom RTD types?
  Yes – configure using PC software
• Q: What’s the maximum cable length?
  600Ω loop resistance limit (THC)
• Q: Is calibration required?
  Factory-calibrated; field adjustment via software
• Q: How does early burnout detection work?
  Triggers when thermocouple resistance increases >50Ω
• Q: What safety approvals does it have?
  Zone 0, IIC and Division 1, Groups A-D