The Invensys Triconex 3674 is a 24VDC digital input/output module primarily designed for industrial safety instrumented systems (SIS). The following is a detailed description:

Electrical Characteristics: Rated voltage is 24VDC, with a voltage range of 16-30VDC and a maximum voltage of 36VDC. Each output point has a maximum rated current of 2A, can withstand a surge current of 10A every 10 milliseconds, and has a maximum load leakage current of 2mA. The module's voltage drop is typically 1.5VDC, with a minimum point isolation of 1500VDC, a common-mode rejection ratio of -85dB at DC-100Hz, and input overrange protection of 150VDC/115VAC continuous.

Functional Features: A dual-channel design with redundant circuitry improves reliability and fault tolerance. Extensive self-diagnostic features help users quickly identify and resolve system issues, reducing maintenance costs. Multiple programming methods are supported, including ladder diagrams, function block diagrams, and structured text. It provides a variety of communication interfaces and protocols, such as Ethernet and serial communication, to facilitate data exchange and communication with other systems and devices.

Output Channels: This module has 32 output signal channels that can be used to drive external devices such as valves, relays, and indicator lights.

Application Areas: Primarily used in industrial process control applications such as the petroleum, chemical, and power generation industries, it enables secure communication and reliable data exchange between components in safety instrumented systems, ensuring the proper operation of critical safety functions.