MTL5049 Dual Channel Signal Isolator - MTL Instruments

MTL5049 Dual Channel Signal Isolator

The MTL5049 from MTL Instruments provides safe signal isolation for hazardous area applications. This dual-channel unit passes two 4-20mA signals from safe-area controllers to loads in explosive atmospheres. It delivers precise signal transfer with complete electrical isolation between areas.

Key Technical Specifications

• Brand: MTL Instruments
• Model: MTL5049
• Product Type: Dual Channel Signal Isolator
• Channels: Two independent channels
• Signal Range: 4 to 20mA standard
• Extended Range: 0 to 24mA capability
• Response Time: 250µs to 10% of final value
• Supply Voltage: 20 to 35V DC

Hazardous Area Certification

• Load Location: Zone 0, IIC, T4-T6 hazardous area
• Division Rating: Division 1, Group A hazardous location
• The MTL5049 maintains intrinsic safety standards
• It provides safe signal transmission to explosive atmospheres

Input Specifications

• Signal Range: 4 to 20mA from controllers
• Extended Range: 0 to 24mA under/over range
• Input Voltage Drop: <4V at 20mA
• Channel 1 Input: Terminal 11 (Input –ve), Terminal 12 (Input +ve)
• Channel 2 Input: Terminal 8 (Input –ve), Terminal 9 (Input +ve)
• Low input voltage drop minimizes impact on controller outputs

Output Performance

• Load Resistance: 550Ω maximum per channel
• Output Voltage: 11V at 20mA driving capability
• Output Resistance: >2MΩ for minimal loading
• Channel 1 Output: Terminal 1 (Output –ve), Terminal 2 (Output +ve)
• Channel 2 Output: Terminal 4 (Output –ve), Terminal 5 (Output +ve)
• Each channel independently drives hazardous area loads

Accuracy & Speed

• Transfer Accuracy: Better than 20µA at 20°C
• Temperature Drift: <1µA/°C for stable operation
• Response Time: Settles within 250µs to 10% of final value
• Circuit Ripple: <40µA peak-to-peak ensures clean signals
• High speed and accuracy maintain process control integrity

Power Requirements

• Supply Voltage: 20 to 35V DC operating range
• Current Consumption: 65mA at 24V with both channels active
• Power Dissipation: 1.4W at 24V maximum
• Supply Terminals: Terminal 13 (Supply –ve), Terminal 14 (Supply +ve)
• Status Indicator: Green LED provides clear power status

Terminal Configuration

• Channel 1: Input (Terminals 11-12), Output (Terminals 1-2)
• Channel 2: Input (Terminals 8-9), Output (Terminals 4-5)
• Power Supply: Terminals 13-14 for 20-35V DC input
• Clear terminal labeling simplifies installation and maintenance

Safety Parameters

• Safety Voltage: 28V maximum
• Internal Resistance: 300Ω
• Safety Current: 93mA maximum
• Isolation Voltage: Um = 250V rms or DC
• Complete isolation ensures safe area protection

Frequently Asked Questions

• How many signals can the MTL5049 handle?
  It isolates and passes two independent 4-20mA signals simultaneously.
• What is the maximum load capacity?
  Each output channel drives loads up to 550Ω with 11V at 20mA.
• How fast does the unit respond to signal changes?
  It settles within 250 microseconds to within 10% of final value.
• Is this suitable for Zone 0 hazardous areas?
  Yes, it carries certification for Zone 0, IIC, T4-T6 areas and Division 1, Group A.