MTL4544 | Dual-Channel HART Transmitter Isolator

MTL4544 Dual-Channel HART Transmitter Isolator

Dual-Channel Signal Conditioning for Hazardous Areas

The MTL4544 provides two independent isolation channels for 2-wire or 3-wire 4-20mA/HART transmitters in Zone 0/Div. 1 hazardous locations. This intrinsically safe solution delivers 16.5V transmitter power while maintaining full HART communication capability.

Key Features

• Two fully isolated 4-20mA channels with HART transparency
• 16.5V output powers field transmitters at 20mA
• Supports loads up to 450Ω in safe area (20mA)
• Ultra-fast 50μs response time for critical processes
• Simple apparatus certified for easy installation

Technical Specifications

• Input/Output Range: 0-24mA (4-20mA nominal)
• Transmitter Supply: 16.5V at 20mA per channel
• Accuracy: ±15μA at 20°C (±0.8μA/°C drift)
• Load Capacity: 450Ω @ 20mA per channel
• Power Consumption: 1.4W @ 24V DC
• Safety Ratings: Uo=28V, Io=93mA per channel
• Certifications: ATEX, IECEx Zone 0 IIC

Typical Applications

• HART smart transmitter interfaces
• Oil and gas wellhead monitoring
• Chemical processing instrumentation
• Tank level measurement systems
• Burner and boiler controls

The MTL4544 meets all requirements for intrinsic safety according to IEC 60079-11, providing reliable signal isolation for critical process measurements in explosive atmospheres.