Introduction to the MTL5573 Temperature Converter

When precise temperature monitoring in hazardous locations is critical, the MTL5573 delivers reliable performance. This Eaton Crouse-Hinds series MTL5500 temperature converter accepts RTD or THC input signals and converts them to a 4-20mA output. Designed for Zone 0 areas, it ensures safe and accurate operation in demanding industrial environments.

Key Features and Technical Specs

• Single-channel temperature input for THC or RTD sensors.
• Power supply range of 20-35 Vdc with 50mA current consumption.
• Power dissipation of 1.2W for energy-efficient operation.
• Response time of 500ms for timely process feedback.
• Selectable cold junction compensation with ≤1.0°C error.
• Common mode rejection of 120 dB at 240V for noise immunity.
• Series mode rejection of 40 dB at 50 or 60 Hz.
• Safety drive on sensor failure: upscale, downscale, or off.
• Early burnout detection when loop resistance exceeds 50Ω.
• Transfer accuracy of ±11µA and temperature drift of ±1.0µA/°C.
• Galvanic isolation of 250V rms between safe-area circuits and power supply.
• LED indicators: green for power, yellow for status.
• Mounts on T-section 35mm DIN rail.
• Operating temperature range from -20°C to 60°C.

Real-World Applications

In oil and gas processing, the MTL5573 converts temperature signals from RTDs or thermocouples in hazardous zones. Its 4-20mA output integrates with distributed control systems for remote monitoring. The selectable cold junction compensation ensures accuracy even with varying ambient conditions. This makes it ideal for refineries, chemical plants, and other classified locations.

Installation and Setup

Mount the MTL5573 on a standard 35mm DIN rail. Connect power within 20-35 Vdc and wire the temperature sensor to the input terminals using crimp ferrules. The terminal capacity accepts conductors up to 2.5mm² stranded or single-core. Configure the module via a PC running MTL PCS45 software with a PCL45USB serial interface. Set cold junction compensation on or off as needed, and choose the safety drive behavior for sensor failure.

Maintenance and Reliability

Routine inspection of the MTL5573 ensures long-term reliability. Check LED indicators: green confirms power, yellow shows status. Verify that the ambient temperature stays within -20°C to 60°C and humidity between 5-95% relative humidity. The robust design minimizes drift, with temperature drift of ±1.0µA/°C. For cost savings, early burnout detection prevents unplanned downtime by alerting to loop resistance increases above 50Ω.

Compatibility and Integration

The MTL5573 integrates with any system accepting 4-20mA signals. Its 250V rms galvanic isolation protects safe-area circuits from hazardous zone transients. The module works with RTD or THC sensors, and the output drives loads up to 600Ω (or >10kΩ with safety drive disabled). Use MTL PCS45 software for configuration—no other protocols are required.

Frequently Asked Questions

Q: What is the power supply requirement for the MTL5573?

A: The MTL5573 requires a 20-35 Vdc power supply with 50mA current consumption.

Q: Can the MTL5573 accept both RTD and thermocouple inputs?

A: Yes, it accepts either THC or RTD input signals, selectable via configuration.

Q: What does the yellow LED indicate on the MTL5573?

A: The yellow LED indicates status, while the green LED shows power is applied.

Q: How do I configure the cold junction compensation?

A: Cold junction compensation is selectable ON or OFF via the MTL PCS45 software.

Q: What is the maximum load resistance for the output?

A: The output drives 0-400Ω normally, up to 600Ω with safety drive enabled, or >10kΩ with safety drive disabled.

Q: Is the MTL5573 suitable for hazardous areas?

A: Yes, it is certified for Zone 0 hazardous locations per IECEx/ATEX standards.

Product Support and Availability

The MTL5573 is in stock and ready to ship from PetroPartsOnline. Contact our team for pricing and lead times. We support industrial automation and oil/gas parts supply globally.