Description
The MTL 4073 is not a standard analog input safety barrier in the typical sense of a pass-through isolator; rather, it is a single-channel temperature converter. It is designed to accept low-level DC signals from hazardous-area temperature sensors—specifically thermocouples or RTDs—and convert them into a standard 4–20 mA signal for safe-area instrumentation.
Key Specifications & Functionality
- Primary Function: Converts temperature sensor inputs (thermocouples or RTDs) into a 4–20 mA output signal.
- Input Compatibility:
- Thermocouples: Supports eight types (e.g., J, K, T, E, R, S, B, N).
- RTDs: Supports 2-, 3-, and 4-wire Pt100, Pt500, and Pt1000 sensors.
- Hazardous Area Rating: Suitable for use with sensors located in Zone 0, IIC, T4–T6 or Division 1 Group A hazardous locations.
- Software Configuration: Features include linearization, ranging, monitoring, testing, and tagging, which are configured via PC software.
- Cold Junction Compensation: For thermocouple applications requiring cold-junction compensation, an SCJ01 hazardous-area connector (which includes an integral sensor) is typically used.
Usage Notes
- Isolation: It provides galvanic isolation between the input, output, and power supply circuits.
- Installation: It is designed for use with the MTL 4000 series backplanes, which allow for modular, space-efficient mounting in control cabinets.
- Note on Listings: You may occasionally see online listings (such as on eBay) incorrectly label the MTL 4073 as a “2-channel analog input isolator.” Based on the manufacturer’s technical specifications, it is a single-channel temperature converter. If you specifically require a standard 4–20 mA analog input isolator (where the input is already a 4–20 mA signal), you would typically look for other models in the MTL 4000 or 5500 series, such as the MTL 4041B or similar isolators.
