MTL Instruments MTL5040 Dual Channel Interface

MTL5040 Bidirectional Signal Interface

The MTL5040 from MTL Instruments provides versatile signal handling for hazardous areas. This dual-channel unit combines transmitter power supply with signal driving capabilities. It handles bidirectional communication between safe and hazardous areas with high precision and speed.

Key Technical Specifications

• Brand: MTL Instruments
• Model: MTL5040
• Product Type: Bidirectional Signal Interface
• Channels: Two independent channels
• Channel 1 Function: Transmitter Power & Repeater
• Channel 2 Function: Signal Driver to Hazardous Area
• Response Time: 250µs typical
• Supply Voltage: 20 to 35V DC

Hazardous Area Certification

• Equipment Location: Zone 0, IIC, T4-T6 hazardous area
• Division Rating: Division 1, Group A hazardous location
• The MTL5040 maintains intrinsic safety for both channels
• It enables safe bidirectional signal transmission in explosive atmospheres

Channel 1 - Transmitter Repeater

• Input Signal: 0 to 24mA from hazardous area transmitter
• Transmitter Voltage: 16.5V at 20mA power supply
• Output Signal: 4 to 20mA to safe area (0-24mA range)
• Load Resistance: 0 to 550Ω maximum
• Input Terminals: Terminal 1 (Input –ve), Terminal 2 (Input +ve)
• Output Terminals: Terminal 11 (Output –ve), Terminal 12 (Output +ve)

Channel 2 - Signal Driver

• Input Signal: 4 to 20mA from safe area controller
• Output Signal: 4 to 20mA to hazardous area load
• Load Resistance: 550Ω maximum (11V at 20mA)
• Input Voltage Drop: <4V at 20mA
• Input Terminals: Terminal 8 (Input –ve), Terminal 9 (Input +ve)
• Output Terminals: Terminal 4 (Output –ve), Terminal 5 (Output +ve)

Performance Specifications

• Transfer Accuracy: Better than 20µA at 20°C
• Typical Accuracy: Typically 5µA
• Temperature Drift: <1µA/°C
• Response Time: Settles within 250µs typical to 10% of final value
• Circuit Ripple: <40µA peak-to-peak
• Output Resistance: >2MΩ for both channels

Power & Isolation

• Supply Voltage: 20 to 35V DC
• Current Consumption: 95mA at 24V with 20mA signals
• Power Dissipation: 1.6W at 24V maximum
• Isolation: 250V AC between all circuits
• Status Indicator: Green LED for power monitoring

Terminal Configuration

• Power Supply: Terminal 13 (Supply –ve), Terminal 14 (Supply +ve)
• Channel 1 Transmitter: Terminals 1-2 (Input), Terminals 11-12 (Output)
• Channel 2 Driver: Terminals 8-9 (Input), Terminals 4-5 (Output)
• Clear terminal identification ensures correct wiring

Safety Parameters

• Safety Voltage: 28V maximum
• Internal Resistance: 300Ω
• Safety Current: 93mA maximum
• Maximum Voltage: Um = 250V rms or DC

Frequently Asked Questions

• What makes the MTL5040 different from other repeaters?
  It provides bidirectional capability - both powering transmitters and driving signals to hazardous areas.
• What load capacity does each channel have?
  Both channels support loads up to 550Ω with full signal accuracy.
• How fast is the signal response?
  The unit typically settles within 250 microseconds to 10% of final value.
• Is this suitable for controller output signals?
  Yes, Channel 2 specifically handles 4-20mA signals from controllers to hazardous area loads.