TRICONEX 9761-210 terminal board module

TRICONEX 9761-210 terminal board module

Working principle

Current-voltage conversion: This module supports 0-5VDC and -5 to + 5VDC analog input modules. Each input has a precise 250-ohm resistor for converting the input current into voltage for subsequent circuit processing. For instance, when a current signal of 4-20mA is input, it can be converted into a voltage signal of 1-5V through this resistor.

Signal transmission and isolation: The terminal board module transmits the converted voltage signal to the analog input module connected to it. During this process, electrical isolation measures will be taken to prevent interference signals from external circuits from entering the control system, and at the same time, to avoid mutual interference among channels, ensuring the accuracy and stability of signal transmission.

Power supply and protection: Supports redundant 24VDC power supply with diode ring circuit to enhance reliability. Each positive terminal is current-limited by a 180-ohm series resistor, which can prevent excessive current from damaging the module or other equipment when the power supply is abnormal, ensuring that the module operates in a stable power supply environment.

Status monitoring and diagnosis: The module has a certain self-monitoring function and can monitor its own working status in real time, such as power status, signal input conditions, etc. When an anomaly is detected, a fault signal will be sent to the control system through the relevant interface, facilitating maintenance personnel to discover and handle the problem in a timely manner.

Integration with the system As a part of the industrial control system, the 9761-210 terminal board module connects to the TRICONEX control system or other related equipment through specific interfaces and communication protocols, accurately transmitting the processed analog signals to the control system and providing real-time process parameter information for the control system. So that the control system can perform corresponding operations and control decisions based on these signals.

Application case:

Application in petrochemical plants: In the Zhejiang Petrochemical Chemical New Materials project, a plant-wide SIS safety instrument system solution centered on the Triconex controller was adopted. The TRICONEX 9761-210 terminal board module can be used as a component of this system to connect various analog input devices on site, such as pressure sensors, temperature sensors, etc. It converts the current signal sent by the sensor into a voltage signal and isolates and transmits it, providing accurate process parameter signals for the safety instrument system. This helps Zhejiang Petrochemical enhance its ability to perceive, assess, monitor, warn and respond to safety production risks, and improve its safety production and management levels.

Application in power system monitoring: In the control systems of some power plants, the TRICONEX 9761-210 terminal board module can be used to connect devices such as current transformers. The current signal output by the current transformer is converted into an appropriate voltage signal through this terminal board module and then transmitted to the analog input module of the control system, so as to monitor and control the current and other parameters of the generator in real time, ensuring that the generator operates in a safe and stable state. At the same time, it also provides reliable data support for the fault diagnosis and protection of the power system.

Application in the monitoring of chemical tank farms: In the automation upgrade projects of tank farms in enterprises such as Sinopec and petrochina, DCS control systems and intelligent sensors and other technologies have been applied. The TRICONEX 9761-210 terminal board module can be connected to the liquid level sensors, temperature sensors, etc. in the tank farm. After converting and processing the current signals of these sensors, they are sent to the DCS system to achieve precise monitoring of parameters such as liquid level and temperature in the tank farm. Then, safety early warning and control of the tank farm are carried out through the DCS system. Ensure the safe operation of the tank farm.