The 3500/34 triple – redundant relay module is a highly reliable component of Bently Nevada’s 3500 series monitoring and protection system, mainly used in industrial machinery protection systems, which can meet the extremely high – availability requirements of safety – instrumented systems. The following is a detailed introduction: – **Working Principle** – It consists of two main components, namely the TMR relay module (two in number) and the TMR relay I/O module. The TMR relay module generates three independent alarm contact signals for each of the four relay channels according to the user – programmed alarm drive logic. The TMR relay I/O module contains 12 relays, divided into four – channel groups, with three relays in each group, providing a 2 – out – of – 3 relay voting function for the four relay channels. – **Function and Features** – **Triple – redundant Design**: It adopts a triple – redundant design with three identical relay channels. Even if one channel fails, the other two channels can still operate, ensuring the normal operation of the system and greatly improving the reliability and availability of the system. – **Alarm Drive Logic**: Each relay contains “alarm drive logic”, which is programmed using “AND” and “OR” logic. It can use the alarm inputs (warnings and dangers) from any monitor channel or any combination of monitor channels in the rack. This logic is programmed through the 3500 rack configuration software to meet specific application requirements. – **High – speed Response**: It is designed with high – performance components, which can provide a fast response time, with a response time of less than 25 ms, and can quickly trigger alarms or protection measures when a fault is detected. – **Good Sealing Performance**: It adopts epoxy resin sealing, with a contact life of 100,000 times at 5A, 24Vdc or 120Vdc. – **Technical Parameters** – **Power Supply Voltage**: 24V DC. – **Power Consumption**: Typically 9.6W. – **Contact Capacity**: 25A. – **Working Temperature**: From – 40 °C to 85 °C. – **Application Scenarios** – It is widely used in industries such as power generation, petroleum and natural gas, chemical industry, papermaking, and mining, and is used to protect various rotating machinery, such as turbines, pumps, generators, etc., monitor the vibration, temperature and other key parameters of the equipment, and trigger alarms or take protection measures when a fault is detected.
