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MTL Instruments | Isolating Driver MTL4546Y

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About the Product

MTL4546Y Hazardous Area 4-20mA to I/P Converter with HART Support

Core Specifications

Parameter Specification
Input Signal 4-20mA (1-24mA under/over-range)
Output Capacity 800Ω max load (16V @ 20mA)
HART Bandwidth 500Hz - 10kHz
Accuracy @20°C ±20μA
Response Time 100ms to ±200μA

Safety & Protection Features

Certification Zone 0, IIC, T4-T6 / Div. 1, Group A
Fault Detection Open-circuit (<0.5mA), Short-circuit (<50Ω)
Output Isolation >1MΩ impedance

Signal Quality

Ripple <40μA p-p (input & output)
Temperature Stability <1.0μA/°C drift
Digital Communication Bi-directional HART signals

Typical Applications

  • Pneumatic valve positioners in refineries
  • Current-to-pressure converters in chemical plants
  • HART-enabled control loops with fault monitoring
  • Process control systems requiring open/short detection

Wiring Guidelines

Minimum Load 90Ω (for proper fault detection)
Optimal Load 520Ω for 24mA over-range
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