MTL4516C Dual-Channel Interface | MTL Instruments

MTL4516C Dual-Channel Hazardous Area Interface

The MTL4516C from MTL Instruments provides safe-area control for two independent hazardous-area circuits. This versatile interface works with both standard switches and NAMUR proximity detectors. It offers configurable line fault detection for maximum system reliability.

Key Features and Benefits

• Two completely isolated channels for Zone 0 and Division 1 hazardous locations
• User-selectable line fault detection for both open and short circuit conditions
• Phase reversal switching provides compatibility with NO and NC sensors
• Clear visual status indicators show power, outputs, and fault conditions
• Full compliance with BS EN60947-5-6:2001 NAMUR industry standards

Technical Specifications

• Brand: MTL Instruments
• Model: MTL4516C
• Input Voltage: Operates with 7-9V DC via 1kΩ±10% input resistance
• Activation Thresholds: Activates above 2.1mA and deactivates below 1.2mA
• LFD Detection: Open circuit alarms below 50µA, short circuit alarms below 100Ω
• Relay Outputs: Two changeover contacts rated at 10W, 0.5A, 35V DC
• Response Time: Achieves rapid operation with less than 10ms response time

Safety Certifications and Power Requirements

• Certified for Zone 0, IIC, T6 and Division 1, Group A hazardous areas
• Entity parameters include Uo=10.5V, Io=14mA, Po=37mW for system design
• Standard 24V DC power supply consuming only 35mA (0.84W)

Installation and Configuration

• Mount the MTL4516C on a standard DIN rail in your control panel
• Connect each channel to its respective hazardous area sensor or switch
• Set the line fault detection jumpers for your specific application needs
• Use external resistors when configuring LFD with contact inputs
• Verify all status indicators function properly during commissioning

Application Areas

• Safety instrumented systems requiring dual redundant control channels
• Oil and gas facilities monitoring critical process conditions
• Chemical processing plants with hazardous area classification
• Pharmaceutical manufacturing requiring reliable safety monitoring
• Any application where dependable hazardous-area control is essential

Frequently Asked Questions

• How many channels does the MTL4516C have? It provides two completely isolated control channels.
• What is line fault detection? LFD monitors for open and short circuit conditions in field wiring.
• What sensors are compatible? It works with both standard switches and NAMUR proximity detectors.
• What certifications does it hold? It carries Zone 0, IIC, T6 and Division 1, Group A certifications.

Configuration Note: When using LFD with contact inputs, you need external resistors (500Ω-1kΩ series, 20kΩ-25kΩ parallel) for proper operation.