TRICONEX 3451 Remote Terminal Unit/Relay Output Module

Technical Specifications:

• It is designed for high availability and fault tolerance, ensuring continuous operation even in the event of hardware failures.
• The system supports safety integrity levels up to SIL 3 according to IEC 61508, making it suitable for critical safety applications.
• It operates with a triple modular redundant (TMR) architecture where three independent systems process data simultaneously and compare results to ensure accuracy and reliability.

• Communication Port Parameters
  • It is equipped with three configurable RS - 232/485 serial ports and two Ethernet ports. Some versions can be configured with four serial ports, with a total data transmission rate of 460.8 kilobits per second for all serial ports.
  • The two Ethernet ports include 802.3 copper Ethernet ports and fiber - optic Ethernet ports in different models, with the Ethernet transmission speed reaching 100Mbps.
  • The first serial port can support Modbus or Trimble GPS interface, and the fourth serial port can be configured as Modbus or Tristation interface.
• Power and Electrical Parameters
  • The nominal input voltage is 24V DC, and the working voltage range is 19.2V DC to 30V DC, which can tolerate 5% AC ripple.
  • The maximum power interruption time allowed from the nominal voltage is 1 millisecond, the minimum repetition rate of power interruption is 1 second, and the maximum logic power consumption of the module is 8 watts.

• Technical Specifications
  • Input and Signal Parameters
    • It is configured with 64 commoned, DC-coupled input channels. It offers software-selectable voltage options of 24 VDC or 48 VDC, adapting to different industrial field requirements.
    • The voltage range for 24 VDC is 15 - 30 VDC with a maximum voltage of 36 VDC; for 48 VDC, the range is 20 - 72 VDC. The turn-on voltage threshold exceeds 15 VDC for 24 VDC and 32 VDC for 48 VDC, while the turn-off threshold is below 6 VDC for 24 VDC and 11 VDC for 48 VDC.
    • The nominal turn-on current is 2 - 3 mA. The input delay is less than 2 ms for 24 VDC and less than 10 ms for 48 VDC, and the minimum point isolation voltage reaches 1500 VDC.
  • Physical and Weight Parameters
    • There are conflicting data on its physical dimensions from different sources, but it is designed for integration into standard Triconex system racks. One source lists its weight as 5000 grams, while another cites approximately 0.5 kilograms, and these discrepancies may stem from differences in whether accessories are included in the weighing.
  • Environmental Parameters
    • It maintains stable operation within an operating temperature range of -40°C to 70°C, which allows it to adapt to extreme temperature conditions in various industrial sites.
    • It has a protection level of IP65, enabling it to resist the impact of dust and water in harsh industrial environments and ensuring long-term reliable operation.

• Electrical Parameters
  • It is configured with 32 commoned digital output channels, the nominal output voltage is 24 VDC, and the adaptive voltage range is 16 - 32 VDC, with a maximum withstand voltage of 36 VDC.
  • Each output channel can provide a maximum current of 1.7 A, the overall power consumption of the module is less than 13 watts, and some data shows that its output power can reach 15 watts.
  • It adopts a dual-power design, which further improves the stability of power supply and avoids system operation interruption caused by single power failure.
• Processing and Memory Parameters
  • It is equipped with a dual-core PowerPC processor with a clock frequency of 800 MHz, which can efficiently support complex control algorithms and logic operations.
  • The module provides a memory range of 1 GB - 8 GB, which can store a large number of control logic programs and real-time operating data to meet the needs of complex industrial control scenarios.