MTL5031 Vibration Sensor Interface - MTL Instruments

MTL5031 Vibration Sensor Interface

The MTL5031 from MTL Instruments safely repeats vibration signals from hazardous areas to monitoring systems. This single-channel interface works with 3-wire eddy-current probes and accelerometers located in explosive atmospheres. 

Key Technical Specifications

• Brand: MTL Instruments
• Model: MTL5031
• Product Type: Vibration Sensor Interface
• Channels: One channel
• Compatible Sensors: 3-wire eddy-current probes & accelerometers
• Voltage Bandwidth: -3dB at 43kHz typical
• Supply Voltage: 20 to 35V DC

Hazardous Area Certification

• Sensor Location: Zone 0, IIC, T4-T6 hazardous area
• Division Rating: Division 1, Group A hazardous location
• The MTL5031 maintains intrinsic safety for vibration monitoring
• It enables safe operation of sensors in explosive atmospheres

Input Specifications

• Input Impedance: 10kΩ ±2% (Terminals 1 and 2)
• Transducer Supply: Terminals 3 and 1 for sensor power
• Signal Range: -20V to -0.5V for <100mV DC error
• Input Terminals: Terminal 1 (Common), Terminal 2 (Signal)
• The interface provides power for 3-wire vibration sensors

Output Performance

• Output Impedance: <20Ω (Terminals 11 and 12)
• Output Terminals: Terminal 11 (Signal –ve), Terminal 12 (Signal 0V)
• Low output impedance ensures strong signal drive capability
• Clean signal transmission to monitoring systems in safe areas

Accuracy & Frequency Response

• DC Transfer Accuracy: <±100mV at 20°C
• AC Transfer Accuracy: ±1% (0Hz to 1kHz)
• Frequency Response: -5% to +1% (1kHz to 10kHz)
• Voltage Bandwidth: -3dB at 43kHz typical
• Temperature Coefficient: ±50ppm/°C (10 to 65°C)

Phase Response & Timing

• Phase Response: <14µs equivalent delay
• Phase Shift: -1° at 200Hz, -3° at 600Hz, -5° at 1kHz
• High Frequency: -50° at 10kHz, -100° at 20kHz
• Minimal phase distortion preserves signal integrity for analysis

Power Requirements

• Supply Voltage: 20 to 35V DC operating range
• Current Consumption: 80mA at 24V with 22mA transducer load
• Power Dissipation: <1.7W maximum
• Supply Terminals: Terminal 13 (Supply –ve), Terminal 14 (Supply +ve)
• Status Indicator: Green LED for power monitoring

Terminal Configuration

• Hazardous Area: Terminal 1 (Common), 2 (Signal), 3 (Transducer Power)
• Safe Area Output: Terminal 11 (Signal –ve), 12 (Signal 0V)
• Power Supply: Terminal 13 (Supply –ve), 14 (Supply +ve)
• Clear terminal identification ensures proper sensor connection

Safety Parameters

• Terminals 3 to 1: 26.6V, 94mA, 0.66W
• Terminals 2 to 1: Non-energy-storing apparatus specifications
• Safety Limits: ≤1.2V, ≤0.1A, ≤20µJ and ≤25mW
• Comprehensive safety protection for hazardous area operation

Frequently Asked Questions

• What sensors work with the MTL5031?
  It is compatible with 3-wire eddy-current probes and accelerometers for vibration monitoring.
• What is the frequency response range?
  The interface maintains ±1% accuracy from 0Hz to 1kHz with 43kHz bandwidth.
• Can this interface power the sensors?
  Yes, it provides transducer supply voltage through terminals 3 and 1.
• Is this suitable for Zone 0 vibration monitoring?
  Yes, it carries full certification for Zone 0, IIC, T4-T6 hazardous areas.