MTL 831C Analog Input Multiplexer

Technical Specifications
- Input and Output Performance
  - It has 16 analog input channels and supports mixed connections of multiple types of sensor signals without the need for additional adapter components.
  - The output signals include 4 – 20mA and 0 – 10V, and the transmission accuracy reaches ±0.1% of span, which guarantees the precision of signal transmission in industrial control processes.
- Transmission Parameters
  - It relies on a single shielded twisted pair as the data highway for signal and power transmission, with a maximum transmission distance of up to 2 kilometers when used with the MTL838C receiver.
  - It achieves 3-way galvanic isolation among input, output and power circuits, effectively preventing signal interference and ensuring signal integrity.
- Power Supply
  - The power supply range is 20V DC to 35V DC, and some versions can also adapt to an 8V DC to 32V DC input range, which is compatible with various industrial power supply systems.
- Physical and Environmental Indicators
  - Its overall dimensions are 10.2 cm × 8 cm × 5 cm and the net weight is 0.12 kg. It supports DIN rail mounting and can also be installed in on-site junction boxes or explosion-proof enclosures.
  - The operating temperature range is -40°C to 70°C, and the storage temperature ranges from -40°C to 85°C. It can work normally in an environment with 5% to 95% relative humidity without condensation, and the protection level reaches IP65.

Category: Others

Description

Functional Features
- Intrinsic Safety and High Security
  - It has intrinsic safety certification and can be directly installed in Zone 0, Zone 1 and Zone 2 hazardous areas without additional explosion-proof measures, which fundamentally ensures the safety of equipment operation in flammable and explosive environments.
- Cost-Effective Wiring Solution
  - The design of transmitting multiple signals and power through a single shielded twisted pair replaces the traditional point-to-point wiring method. It can reduce installation costs by up to 50%, especially showing obvious cost advantages in scenarios that require long-distance transmission of thermocouple compensation cables.
- Convenient Maintenance and Expansion
  - It offers an optional plug-in screw terminal version named MTL831C – PS, which simplifies the disassembly and assembly process during later maintenance and shortens equipment downtime.
  - A single MTL838C receiver can connect to one or two MTL831C units, enabling the system to expand to a maximum of 32 input channels and meeting the needs of large-scale industrial signal collection.
- Strong Anti-Interference and Stability
  - The 3-way galvanic isolation design and shielded twisted pair transmission effectively resist electromagnetic interference in complex industrial environments. Its high linearity and stable signal transmission performance ensure the reliability of industrial process control.
Application Scenarios
- Oil and Gas Industry
  - It is widely used in oil wells, offshore oil platforms and refineries. It collects temperature, pressure and flow signals of pipelines and processing equipment in Zone 0 hazardous areas, and transmits them safely to the central control system, providing data support for real-time monitoring and control of production processes.
- Chemical Industry
  - In chemical production workshops involving flammable and corrosive media, it is used to collect analog signals such as temperature, liquid level and pH value of reaction kettles and storage tanks. It ensures the safe transmission of signals in harsh and hazardous environments and guarantees the stable operation of the production process.
- Pharmaceutical Industry
  - In pharmaceutical production links that require strict temperature and pressure control, such as drug crystallization and sterilization, it collects key process parameter signals. It not only meets the intrinsic safety requirements of the production environment but also ensures the accuracy of parameter transmission, which is conducive to maintaining the consistency and quality stability of pharmaceutical products.
- Food and Beverage Industry
  - It is applied in food processing processes such as high-temperature sterilization and low-temperature refrigeration. It monitors temperature and liquid level signals in production equipment and workshops. Its stable and reliable signal transmission helps enterprises comply with food safety production standards and realize refined process control.
- Mining Industry
  - In underground mines and open-pit mining sites, it collects signals from temperature and gas concentration sensors in hazardous areas. It transmits the data to the ground control center through long-distance transmission capacity, providing a safe guarantee for the safety monitoring and production scheduling of mining operations.

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