I. Functional Features

1. System Connection:
   • Connects up to 16 loops via the backplane, receives multiplexed control signals from MTL4841, and selects one channel for communication.
   • A single MTL4842 module can connect 16 on-site signals; when used with MTL4841, it collects on-site HART instrument signals and transmits them to the control system or upper computer software.
2. Address Setting:
   • Module address can be selected via the top switch, enabling flexible configuration for easy identification and management in the system.
3. Signal Isolation:
   • Provides isolation between on-site instruments and multiplexers, preventing damage to multiplexers due to instrument faults and enhancing system stability and reliability.
4. Status Indication:
   • Green LED: Indicates power status.
   • Amber LED: Indicates whether the module is selected by MTL4841.
   • 4 red LEDs: Used to identify loop addresses.
   • These indicators allow users to intuitively monitor the module’s working status, facilitating debugging and fault troubleshooting.

II. Technical Parameters

• Power Supply: Powered by the backplane, power consumption < 0.1W (low power consumption, saving energy and reducing overall system power usage).
• Operating Temperature: -40°C to +85°C (wide adaptation range, ensuring stable operation in harsh industrial environments).
• Input Voltage: 12 to 48V DC (compatible with multiple power voltages, improving applicability and flexibility).
• Dimensions & Weight:
  • Dimensions: Approximately 100mm × 100mm × 45mm.
  • Weight: Approximately 0.30kg (the product manual also mentions 0.2kg, which may vary by version or configuration).
  • Compact and lightweight, facilitating installation and integration into various devices.

III. Application Fields

1. Industrial Automation Control Systems:
   • Used in automated production lines (e.g., automobile manufacturing, electronic equipment production) to connect various HART-protocol smart sensors and actuators. It enables precise control of production processes and equipment status monitoring, improving production efficiency and product quality.
2. Petrochemical Industry:
   • Applied in oil extraction, refining, and chemical production processes to connect on-site HART-protocol instruments (e.g., temperature transmitters, pressure transmitters, flowmeters). It transmits signals from these instruments to the control system in the central control room, realizing real-time monitoring and automated control of production processes to ensure safety and stability.
3. Power Industry:
   • Used in power plants, substations, etc., to transmit signals from HART-protocol devices (e.g., smart electricity meters, relay protection devices) to the monitoring system. This enables real-time monitoring and management of the power system’s operating status, ensuring safe and reliable operation of the power system.