MTL4544D HART Barrier: Dual-Loop Isolator for Hazardous Area Transmitters
Core Functionality
The MTL4544D powers and monitors 2/3-wire transmitters in explosive zones. Features dual safe-area outputs and full HART communication support. Delivers precise 16.5V transmitter power at 20mA. Solid-state design ensures fast response.
Technical Specifications
| Brand/Model: | MTL4544D Series |
| Channels: | 1 input → 2 outputs |
| Input Range: | 0-24mA (including over-range) |
| Output Range: | 4-20mA (0-24mA over-range) |
| Accuracy: | Better than 15μA @20°C |
| Response Time: | <50μs |
| Load Capacity: | 450Ω @20mA |
| HART Support: | Full bi-directional |
| Power Consumption: | 96mA @24V DC |
Installation Guide
Connect transmitter to terminals 1-3. Use terminals 2-1 for HART communication. Safe-area outputs connect to terminals 7/8. Certified for Zone 0/IIC T4-T6 areas.
Device Compatibility
Works with all 2/3-wire 4-20mA transmitters and HART-enabled devices. Supports 4-wire transmitters (without HART). Not for bussed power systems.
Safety Certifications
Approved for Division 1, Group A. Safety parameters: Uo=28V, Io=93mA. Meets international intrinsic safety standards.
Package Includes
- MTL4544D barrier unit
- Installation manual
- Terminal labels
Warranty & Shipping
12-month performance guarantee. Ships worldwide via FedEx, UPS, DHL. Tracking provided.
Technical FAQs
- Q: Maximum transmitter cable length?
A: Limited by 360Ω loop resistance - Q: Works with Foundation Fieldbus?
A: No – HART protocol only - Q: Minimum operating voltage?
A: 16.5V maintained at 20mA - Q: Calibration required?
A: Factory calibrated – ready to use - Q: Temperature drift specification?
A: <0.8μA/°C
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