TTH300
Siemens TTH300 Temperature Transmitter Module
Product Description
The TTH300 is a high-precision temperature transmitter module developed by Siemens, designed to convert signals from temperature sensors (such as thermocouples and RTDs) into standardized analog outputs for integration with industrial control systems, PLCs, and DCS. It serves as a critical interface in temperature measurement loops, ensuring accurate and reliable conversion of sensor signals into 4-20 mA or 0-10 V DC outputs that can be easily processed by control equipment. This module is widely used in industries including chemical processing (reactor temperature monitoring), food and beverage production (pasteurization temperature control), and HVAC systems (duct and room temperature regulation), where precise temperature measurement is essential for process quality and safety.
In a chemical reactor system, the TTH300 connects to a thermocouple inserted into the reactor vessel, converting the millivolt-level signal from the thermocouple into a 4-20 mA current signal proportional to the measured temperature (e.g., 4 mA = 0°C, 20 mA = 300°C). This signal is transmitted to the DCS, which uses it to adjust heating or cooling systems to maintain the reactor at the desired temperature. In food processing, it ensures pasteurization temperatures are accurately measured and transmitted, enabling the control system to enforce strict temperature-time profiles for microbial safety.
The module features advanced signal conditioning circuitry with high linearity and low drift, ensuring long-term measurement accuracy even in harsh industrial environments. It supports a wide range of sensor types, with configurable input ranges to match specific application requirements. Built-in cold junction compensation for thermocouples and lead wire resistance compensation for RTDs further enhance measurement precision. The TTH300 includes diagnostic functions to monitor sensor integrity (e.g., open circuits, short circuits) and module health, with fault signals transmitted via the output (e.g., a fixed low or high current) to alert the control system of issues. Its rugged design with IP65 protection rating allows for direct installation in harsh environments, including dusty or damp areas, and it supports loop-powered operation to simplify wiring.
