Description

TRICONEX 3481 Analog output module

High Reliability: Adopts Triple Modular Redundancy (TMR) technology, fundamentally eliminating the possibility of single-point failures. The module contains three completely independent channels, and an internal voting circuit selects one channel to drive the final output. Even if one channel fails, the remaining channels can seamlessly take over to maintain normal system operation.
High-precision Output: Capable of providing high-precision 4-20mA analog output signals with an output accuracy of <0.25% (within the 4-20mA range, based on 0-22mA Full Scale Range, FSR) and a 12-bit resolution. This ensures the control system accurately commands field actuators, enabling smoother and more precise control.
Powerful Self-diagnosis Function: Through the built-in Forced Switching Diagnostics (FSD) function, it can monitor its own operating status in real time, promptly detect and report potential faults, simplifying maintenance and shortening troubleshooting time.
Easy Integration: With a compact and modular design, it facilitates user installation and replacement, easily integrating into existing TRICONEX safety systems to reduce maintenance costs. Meanwhile, its wide adaptability to external loop power supplies allows flexible application in various industrial fields.

Number of Output Channels: 4.
Output Current Range: 4–20 mA (controlled), 0–22 mA (over-range).
External Loop Power Supply: Maximum 32 VDC, nominal 24 VDC.
Output Loop Power Requirements: >16 VDC at 300Ω (minimum 1 A); >20 VDC at 500Ω (minimum 1 A); >24 VDC at 700Ω (minimum 1 A); >28 VDC at 800Ω (minimum 1 A).
Over-range Protection: Withstands 36 VDC (continuous) and 0 VDC (continuous).
Fault Switching Time: Typical value 1 ms, maximum 3 ms.

Oil & Gas Industry: Used to control critical valves such as emergency shutdown valves and control valves, ensuring rapid and reliable execution of safety actions in abnormal situations to prevent accidents.
Chemical Industry: Meets the strict requirements for control precision in complex processes, applicable to scenarios like temperature and pressure control of reactors, and precise adjustment of material flow, ensuring safe and stable production.
Power Industry: Plays a key role in nuclear and thermal power sectors, used to control actuators of critical equipment such as steam turbines and boilers, safeguarding power plant safety.
Transportation Sector: Applied in safety-related control systems for rail transit and aerospace, such as signal control and braking systems, to ensure operational safety.
Other Industries: Widely used in industries with strict requirements for production stability and safety, such as pharmaceuticals and food & beverage, for precise control of ingredients and production line speeds.

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