MTL4042 Hazardous Area Isolator - MTL Instruments

MTL4042 Hazardous Area Signal Isolator

The MTL4042 delivers intrinsically safe power for 2-wire transmitters in hazardous locations. This reliable interface repeats 4-20mA signals to safe-area control systems with excellent performance. The unit provides robust 650Ω load capacity for demanding applications. It maintains complete safety certification for Zone 0 and Division 1 areas.

Transmitter Power Features

• The isolator provides 18V minimum at 20mA for transmitter operation.
• It delivers 28V maximum open-circuit voltage for reliable starting.
• The unit carries IIB/T4-6 hazardous area certification for safety.
• It ensures stable power supply for various 2-wire transmitters.

Signal Performance Specifications

• The device handles 4-20mA signals with 1.0-21.5mA range capability.
• It maintains high accuracy of ±20μA across the measurement range.
• A fast response time of 20ms ensures quick signal updating.
• The unit provides excellent signal repeatability for control systems.

Technical Specifications

• The isolator carries ATEX Zone 0 IIC and Class I Div 1 certification.
• It supports load capacity of 650Ω at 20mA for long cable runs.
• The device features low temperature drift below 1μA/°C.
• It provides strong isolation voltage of 250V AC for safety.
• The unit requires 24V DC power supply at 65mA typical current.
• It maintains FM entity parameters Voc=28V, Isc=185.5mA.

Terminal Connections

• Field Side: Terminal 2 for TX Supply +ve, Terminal 5 for Current Input -ve
• Safe Area: Terminal 9 for Output +ve, Terminal 11 for Output -ve
• Power Supply: Terminal 14 for Supply +ve, Terminal 13 for Supply -ve
• All connections feature secure screw terminals for reliable contact.

Installation & Operation

• The unit enables safe power for 2-wire transmitters in hazardous areas.
• It provides signal isolation between field and control systems.
• The design supports easy DIN rail mounting in standard enclosures.
• It eliminates ground loops and noise interference in signals.

Industrial Applications

• Perfect for process control systems in chemical plants.
• Essential for pipeline monitoring in oil and gas facilities.
• Ideal for hazardous area instrumentation in various industries.
• Reliable for safety system interfaces in manufacturing plants.

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