The MTL5516C is a dual-channel switch/proximity detector interface designed for hazardous-area applications. It provides galvanic isolation, ensuring safe and reliable signal transmission between field devices and control systems. The module also features line fault detection (LFD), enhancing diagnostic capability in industrial environments. Its robust design and compliance with IEC 61508 (SIL2/SIL3) make it ideal for safety-critical systems.

Technical Specifications

• Model Number: MTL5516C
• Type: Switch/Proximity Detector Interface
• Manufacturer: MTL Instruments (Eaton)

Electrical Characteristics

• Number of Channels: 2 independent channels
• Input Supply Voltage: 20–35V DC
• Maximum Safety Voltage: 10.5V DC
• Sensor Supply: 7–9V DC via 1kΩ ±10% resistor
• Power Dissipation: 0.84W at 24V DC

Input Characteristics

• Normal Operation:
  • Output closes if input > 2.1mA (<2kΩ)
  • Output opens if input < 1.2mA (>10kΩ)
• Hysteresis: 200μA (nominal), 650Ω equivalent

Relay Output

• Output Type: 2 single-pole relays with changeover contacts
• Response Time: ≤10ms
• Contact Ratings:
  • 250V AC, 2A (cosØ > 0.7)
  • 40V DC, 2A (resistive load)

Environmental Ratings

• Operating Temperature: -20°C to +60°C
• Storage Temperature: -40°C to +80°C

Certifications and Compliance

• Safety Standard: IEC 61508
• SIL Capability: SIL2/SIL3 capable