MTL4014 Relay Isolator MTL Instruments Hazardous Area

MTL4014 Hazardous Area Relay Isolator

The MTL4014 from MTL Instruments offers reliable safety isolation for hazardous locations. This NAMUR-compliant isolator provides reed relay outputs for safe-area control with advanced monitoring features. It ensures operational safety in explosive atmospheres with comprehensive fault detection.

Core Functionality

• Reed relay output for safe-area control circuits
• Built-in line fault detection for wiring monitoring
• NAMUR-compliant proximity and switch inputs
• Earth fault monitoring when used with MTL4220

Technical Specifications

• Input Voltage: 7-9V DC through 1kΩ resistor
• Switching Thresholds: 1.2mA OFF and 2.1mA ON
• Relay Rating: 0.5A at 35V DC maximum
• Response Time: 2ms maximum switching delay
• Power Consumption: 1.1W at 24V DC supply
• Safety Certifications: Zone 0, IIC T6 hazardous areas

Safety Features

• Automatic line fault detection for open or short circuits
• Continuous operation during earth fault conditions
• Multi-color LED indicators for status monitoring
• Amber for active, red for fault, green for power

Application Examples

• Oil refinery safety interlock systems
• Chemical tank level monitoring and control
• Explosion-proof conveyor system controls
• Gas pipeline valve control and monitoring

Installation Guide

• Terminal 6 connects to MTL4220 for earth fault detection
• Terminals 7-8 provide relay output contact connections
• Terminals 10-11 used for line fault signaling
• External resistors required for switches with LFD

Package Contents

• 1x MTL4014 relay isolator unit
• 1x DIN rail mounting kit
• 1x Installation manual
• 1x Terminal label sheet