MTL 4541 Single-Channel Intrinsically Safe 4-20mA HART Repeater Power Supply

Technical Specifications

Input Parameters
- The hazardous – area input signal range covers 0 to 24mA, including over – range signals. It supplies 16.5V voltage to the transmitter when the current is 20mA.
- It is compatible with 2 – wire or 3 – wire 4 – 20mA transmitters, and can also connect to separately powered current sources such as 4 – wire transmitters, though HART communication is not supported for the latter.
Output Parameters
- The safe – area output signal range is 4 – 20mA, with an under/over – range of 0 – 24mA. The load resistance can reach 360Ω at 24mA and 450Ω at 20mA.
- The safe – area circuit has an output resistance greater than 1MΩ, and the circuit ripple is less than 50µA peak – to – peak, ensuring stable output signals.
Accuracy and Response Performance
- The transfer accuracy is better than 15µA at 20°C, and the temperature drift is less than 0.8µA/°C. The linearity error is less than 0.05%, and the temperature coefficient is 0.01% per °C.
- The module settles to within 10% of the final value within 50µs, enabling rapid response to signal changes.

Category: Others

Description

- Power Supply and Isolation
  - The power supply voltage range is 20V DC to 35V DC, with a typical current consumption of 45mA at 24V DC, and the power dissipation is 0.7W at 24V DC.
  - It achieves 250V AC galvanic isolation between input, output and power circuits, effectively avoiding mutual interference between different circuits.
- Physical and Environmental Indicators
  - Its dimensions are 104.8mm in width, 121.8mm in height and 15.8mm in depth, with a weight of approximately 150g. It adopts backplane mounting and screw connection.
  - The operating temperature range is -20°C to 60°C, and it can work normally in an environment with 5% – 95% relative humidity without condensation, with an IP rating of IP20.
Functional Features
- Reliable HART Communication Support
  - It enables bidirectional HART communication through terminals 1 and 2, which allows operators to configure, calibrate and diagnose HART – compatible transmitters in the safe area without entering dangerous hazardous areas, greatly improving the convenience of equipment maintenance.
- High Precision and Stable Signal Transmission
  - It has excellent transfer accuracy and low temperature drift. The minimal ripple of the output circuit ensures that the signal transmitted to the safe – area load can truly reflect the data detected by the hazardous – area transmitters, laying a foundation for accurate industrial control decisions.
- Strong Intrinsic Safety and Wide Adaptability
  - It meets multiple international intrinsic safety certification standards such as ATEX, IECEx, FM and CSA. It can be directly used in high – risk hazardous areas, eliminating the need for additional explosion – proof protective devices and ensuring the safety of the entire industrial loop.
- Easy Integration and Installation
  - It is designed to match the MTL 4000 series backplanes and has a rapid install – and – release mechanism. Its ultra – thin structure achieves a high packing density in control cabinets, which helps save installation space and simplifies the overall wiring of the industrial control system.
Application Scenarios
- Oil and Gas Industry
  - It is installed in onshore oil refineries and offshore oil platforms to connect pressure, flow and temperature transmitters in Zone 0 hazardous areas with the control system in the safe – area central control room. It realizes the transmission of detection data and supports HART communication for remote parameter adjustment of transmitters, ensuring the stable operation of oil extraction and refining processes.
- Chemical Processing Plants
  - It is applied in the production lines involving flammable and corrosive media. It links the concentration, pH and pressure transmitters on reaction kettles and pipelines with the DCS system in the safe area. It guarantees the reliable transmission of process data and enables operators to maintain transmitters remotely without stopping production.
- Pharmaceutical Production Facilities
  - In pharmaceutical workshops that require strict process control, it is used to connect temperature and pressure transmitters in sterile and hazardous production areas with the monitoring instruments in the safe area. The high – precision signal transmission ensures that the production environment parameters meet the pharmaceutical standards, and the intrinsic safety design avoids potential safety hazards caused by electrical equipment.
- Petrochemical Storage Terminals
  - It is used in the liquid level monitoring system of storage tanks. It connects the 4 – 20mA liquid level transmitters installed on the storage tanks with the safe – area display and alarm devices. It transmits the liquid level data in real time and supports HART communication to adjust the transmitter’s measurement range, preventing overflow or dry – running accidents of the storage tanks.
- Power Generation Industry
  - In the hazardous areas such as coal – fired power plant boiler rooms and gas turbine rooms, it connects the gas concentration and temperature transmitters with the central control system. It ensures the safe transmission of key operating data and allows remote diagnosis of transmitter faults through HART communication, which improves the efficiency of equipment maintenance and the stability of power generation operations.

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