MTL5074 Temperature Signal Conditioner 4-20mA Converter

MTL5074 Temperature Signal Conditioner: Hazardous-Area Sensor to 4-20mA Converter

Transform Hazardous-Area Temperatures into Safe Signals

The MTL5074 converts thermocouple/RTD signals from Zone 0 hazardous areas into 4-20mA current. Features software configuration and cold-junction compensation for accurate readings.

Critical Technical Specifications

• Brand/Model: MTL5074 Temperature Series
• Input Types:
  • Thermocouples: J,K,T,E,R,S,B,N
  • RTDs: 100Ω platinum (2/3/4-wire)
• Input Ranges:
  • Voltage: -75mV to +75mV
  • Resistance: 0-400Ω
• Accuracy:
  • ±15μV or ±0.05% (thermocouples)
  • ±80mΩ (RTDs)
  • ±0.1% span (typical)
• Noise Rejection:
  • 120dB common mode rejection
  • 40dB series mode rejection
• Output: 4-20mA (600Ω max load)
• Response Time: Configurable 0-60s damping

Configuration Options

• Standard Models:
  • MTL5074: Includes HAZ-CJC plug for thermocouples
  • MTL5074-RTD: For RTD/mV inputs
• Software Features:
  • Linearization for 8 thermocouple types
  • Adjustable damping/smoothing
  • Alarm settings for failures

Safety & Certifications

• Hazardous Area Rating:
  • Zone 0, IIC, T4
  • Div.1, Group A
• Isolation: 250V AC between circuits

Wiring & Diagnostics

• Terminal Functions:
  • 1: Input (–) | 3: Input (+)
  • 4: 3-wire RTD | 5: 4-wire RTD
  • 11-12: Output | 13-14: Power
• Diagnostics:
  • Green LED power/status indicator
  • Sensor burnout detection
  • CJC failure alarms

Package & Support

• Contents: Unit, HAZ-CJC plug, manual
• Warranty: 12-month quality guarantee
• Shipping: FedEx/UPS/DHL (2-5 business days)

Expert FAQs

• Q: What’s the RTD excitation current?
  A: 200μA nominal constant current
• Q: Can I use Type S thermocouples?
  A> Yes, all 8 major types supported
• Q: Is calibration software included?
  A: Requires MTL PCS45 software (sold separately)
• Q: Maximum load resistance?
  A: 600Ω at 24V power supply
• Q: Temperature drift performance?
  A: ±0.003%/°C (thermocouples), ±7mΩ/°C (RTDs)