MTL Instruments MTL5573 | Zone 0 Temperature Transmitter

Product Overview

The MTL5573 Temperature Converter from MTL Instruments provides intrinsically safe signal conditioning for hazardous area temperature monitoring. This single-channel unit converts RTD and thermocouple inputs to 4-20mA outputs with exceptional 120dB common mode rejection. The MTL5573 features early burnout detection and flexible configuration for reliable process control.

Technical Specifications

• Manufacturer: MTL Instruments
• Model: MTL5573 Temperature Converter
• Channels: Single channel operation
• Hazardous Rating: Zone 0, IIC, Division 1 Groups A-D
• Output: 4-20mA into 600Ω maximum
• Response Time: 500ms typical
• Power Consumption: 50mA at 24V

Signal Performance

• RTD Excitation: 200μA nominal current
• CMRR: 120dB @ 240V, 50/60Hz
• SMRR: 40dB @ 50/60Hz
• CJC Error: ≤1.0°C for thermocouples
• Output Compliance: NAMUR NE43 standard

Safety Features

• Sensor Failure: Upscale/downscale/off options
• Early Burnout: >50Ω resistance detection
• Lead Resistance: 600Ω with safety enabled
• Maximum Voltage: Um=253V RMS or DC
• Certification: Full hazardous area approval

Configuration & Monitoring

• Software: MTL PCS45 with PCL45USB interface
• CJC Control: Selectable ON/OFF for thermocouples
• Alarm Indication: Green EBD, Yellow alarm LEDs
• Power Dissipation: 1.2W at 24V operation

Application Features

• Input Types: RTD and thermocouple compatible
• Output Range: 4-20mA standard process signal
• Isolation: High CMRR for noisy environments
• Diagnostics: Comprehensive failure detection
• Flexibility: Multiple failure mode responses

Frequently Asked Questions

• What is the common mode rejection?

120dB rejection at 240V for 50/60Hz interference.

• How is early burnout detected?

Triggered when loop resistance increases beyond 50Ω.

• What configuration software is needed?

MTL PCS45 software with PCL45USB interface for PC setup.

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