MTL 4045C Isolator | 4-20mA Input/Output, IS, DIN Rail, ATEX/IECEx, FM/CSA Specs

MTL 4045C Isolator | 4-20mA Input/Output, IS, DIN Rail, ATEX/IECEx, FM/CSA Specs

MTL 4045C signal conditioner specifications. 4-20mA input, 4-20mA output, 2-port isolator, intrinsic safety. ATEX/IECEx/FM/CSA approved for hazardous areas.

Product Overview

The MTL 4045C​ is a single-channel signal conditioner/isolator​ from MTL's 4000 series, designed to provide galvanic isolation and intrinsic safety protection​ for 4-20mA process signals. This device provides 1:1 signal isolation​ between hazardous and safe areas, features a two-port (input/output) configuration, and carries ATEX, IECEx, FM, and CSA approvals​ for Zone 1 hazardous locations. The "4045C" designation identifies this specific two-port isolator model. This unit ensures signal integrity and provides safety isolation for control loops in explosive atmospheres.

Technical Specifications

Note: Specifications are based on MTL 4000 series documentation. The 4045C is a fixed-range, two-port isolator. Always verify with the latest product datasheet for your region.

Key Features

• Two-Port Isolation:​ Provides galvanic isolation between field and control systems

• High Accuracy:​ ±0.1% accuracy for precise signal transmission

• Intrinsic Safety:​ Approved for Zone 1 hazardous locations

• Compact Design:​ Only 12.5mm wide for high-density installations

• Wide Power Supply Range:​ 20-30V DC operation

• LED Status Indicator:​ Visual confirmation of operation

• Global Approvals:​ Certified for international hazardous area applications

• Maintenance-Free:​ No calibration or configuration required

• High Isolation:​ 500V AC isolation between input and output

• Burnout Protection:​ Configurable response for sensor failure

Entity Parameters (for Hazardous Area Design)

Note: The 4045C is typically considered a "simple apparatus" when used within its electrical parameters. Connected field transmitters must be certified as intrinsically safe.

Performance Characteristics

Typical Wiring Configuration

Hazardous Area (Zone 1)        Safe Area
      |                             |
[4-20mA Transmitter]         [Control System]
      |                             |
      |---[MTL 4045C Isolator]---|
      |         |                 |
   Input (4-20mA)           Output (4-20mA)

Typical Applications

• Process Control Loops:​ Isolation of 4-20mA signals from field transmitters

• Temperature Monitoring:​ Signal isolation for RTD and thermocouple transmitters

• Pressure/Level Measurement:​ Isolation for pressure/level transmitter signals

• Flow Measurement:​ Signal conditioning for flow transmitters

• Analytical Instruments:​ Isolation for gas detectors and analyzers

• Motor Monitoring:​ Current signal isolation for motor protection

• Any application requiring​ intrinsic safety isolation for standard 4-20mA signals

Important Technical Notes

1. Power Supply Requirements:​ Requires 20-30V DC power supply. Ensure adequate current capacity: Isolator (< 50mA) + Output load (e.g., 250Ω @ 20mA = 5V drop).

2. Field Device Certification:​ 4-20mA transmitters in the hazardous area must be certified as intrinsically safe or qualify as "simple apparatus."

3. Burnout Response Configuration:​ The 4045C typically has a fixed burnout response (often up-scale). Verify the specific configuration for your application requirements.

4. Grounding:​ While the isolator doesn't require a safety ground, proper grounding of the control system is essential for noise immunity and lightning protection.

5. Wiring Practices:​ Use twisted pair cables for noise immunity. Maintain separation between intrinsically safe and non-intrinsically safe wiring (minimum 50mm).

6. Voltage Limitations:​ Do not exceed 30V DC on either input or output. Ensure power supply and field devices operate within these limits.

7. LED Indicator:​ Green LED indicates normal operation (power present and signal within range).

8. Certification Compliance:​ Verify that the 4045C's certifications match the hazardous area classification (Zone 1, IIC, T6) and gas groups of your specific application.

9. High-Density Installation:​ The 12.5mm width allows high-density mounting. Ensure adequate spacing for heat dissipation, especially in high ambient temperatures.

10. Calibration:​ While highly accurate, periodic verification may be required based on process criticality and quality system requirements.

Note: This data sheet provides general specifications for the MTL 4045C two-port signal isolator. For complete installation guidelines, certification details, wiring diagrams, and safety instructions, consult the official MTL 4000 Series Technical Manual. Always verify that the product configuration and certifications match your specific application requirements.