Triconex 3301 Digital input Module

Basic parameters:

Number of channels: There are usually 32 channels.

Input voltage: The rated input voltage is 24VDC, the operating voltage range is 15-30VDC, the absolute maximum input voltage is 33VDC, and the absolute maximum reverse input voltage is -0.6VDC.

Input impedance: Greater than 30kΩ without a base plate, and approximately 3kΩ with a base plate.

Input delay: The on-off delay is both less than 10ms, and the typical value is 6.4ms (-3dB) at 25Hz.

Input power: 0.2W per point at 24VDC and 0.5W per point at 33VDC.

Input threshold: 0-5VDC is the off area.

Functional characteristics:

Signal monitoring and control: It can be connected to sensors, actuators, switches, relays and other devices. It reads external signals such as temperature, pressure, flow and other related switch signals through multiple input channels, and can send control signals through output channels to achieve control of motor start and stop, valve opening and closing and other operations.

High reliability: It features a redundant design with multiple processors and I/O modules. Even if some components fail, the system can still continue to operate, enhancing the reliability and stability of the system.

Fault diagnosis: It has a fault diagnosis function, capable of detecting and reporting abnormal or fault conditions, facilitating timely handling by staff.

Working principle: The Triconex 3301 module operates based on Triple Module Redundancy (TMR) technology and has three independent parallel control systems inside. After the module receives the external input signal, it is processed by these three systems respectively. Then, the final signal state is determined through a three-out of two voting mechanism to ensure the accuracy and reliability of the output result and effectively avoid system errors caused by single point of failure.

Application scenarios

In the petrochemical field: It can be used to monitor the status of valves on various process pipelines, such as the opening and closing signals of emergency shut-off valves and control valves, to ensure the safe and stable operation of the process flow. It can also collect the liquid level switch signals of equipment such as reactors and storage tanks. When the liquid level reaches the set high or low limit values, the signal is promptly transmitted to the control system to trigger the corresponding alarm or control actions. In addition, in petrochemical production, for the monitoring of the operating status of key rotating equipment such as compressors and pumps, for instance, by monitoring their shaft displacement and vibration switch signals, the module can provide real-time feedback on the equipment's operating conditions, facilitating the timely detection of potential equipment faults.

In the power industry, it is used to collect the action signals of protective relays for generators, transformers and other equipment in power plants. When faults such as overload or short circuit occur in the equipment, the protective relay acts, and the module quickly transmits the signal to the control system to achieve protective measures such as rapid tripping. It can also monitor the position and status of circuit breakers and disconnectors within the substation, providing accurate switch quantity information for the dispatching and operation management of the power system. In addition, for various auxiliary equipment in the power plant, such as induced draft fans and feed water pumps, the module can receive their start and stop status signals, so as to uniformly monitor and manage the operation of the entire power plant's equipment.

In the metallurgical industry, during the steel production process, it can be used to monitor the signal of the material level switch in the blast furnace, helping operators understand the material filling situation inside the blast furnace and carry out feeding operations in a timely manner. It can also collect the limit switch signal of the tilting Angle of the steelmaking converter to ensure the accurate position of the converter during the tilting process and prevent dangerous situations such as overtilting. In addition, for the steel rolling production line, the module can monitor the start and stop status of the rolling mill, the signal of the rolling speed switch, etc., providing data support for the automatic control and quality monitoring of the production process.

In the field of transportation: In the shipping sector, it can be used to monitor the operational status of various equipment in the ship's engine room, such as the start and stop signals of the main and auxiliary engines, and the alarm signals for the high and low water levels at the bottom of the cabin, ensuring the safety of ship navigation. It can also monitor the on/off status of valves, pumps and other equipment on the ship, achieving the automatic control of the ship's power system and pipeline system. In addition, in rail transit, signals such as the opening and closing status of train doors and the status of signal lights along the tracks can be collected to ensure the safety of train operation and passengers getting on and off the train.

In other fields: In industries such as pharmaceuticals and food, which have high requirements for production environment and processes, switch signals can be used to monitor the operating status of production equipment and key process parameters, such as temperature and pressure switch signals of reaction vessels, to ensure that the production process meets process requirements and quality standards. In sewage treatment plants, the start and stop status of sewage pumps, liquid level switch signals, etc. can be collected to achieve automatic control and operation monitoring of the sewage treatment process.