TRICONEX AO3481S2 Analog Output Module

I. Product Overview

II. Technical Specifications

1. Electrical & Input Parameters

2. Redundancy & Safety Parameters

3. Environmental & Reliability Parameters

4. Compatibility & Communication Parameters

III. Functional Features

1. Triple-Redundant Fault-Tolerance Design: Ensures Uninterrupted Signal Acquisition

• 3-Channel Independent Acquisition: Each of the 16 input signals is collected by 3 independent channels (equipped with separate AD converters, isolation circuits, and signal conditioning chips). The 3 channels synchronously acquire the same signal and transmit it to the central voting unit in real time. In hydrocracking units, if a pressure switch signal experiences temporary open circuit due to cable aging, the other 2 channels continue normal acquisition, and the module outputs valid signals via "2-out-of-3" voting to prevent erroneous unit shutdowns.

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• Flexible Voting Logic: Supports three voting modes—"2-out-of-3" (2oo3, high reliability), "1-out-of-3" (1oo3, high availability), and "3-out-of-3" (3oo3, ultra-high safety)—configurable via TriStation 1131 software. In nuclear power cooling systems, the "2-out-of-3" mode (action triggered only when 2 channels agree) reduces the risk of false operations; in oil and gas wellhead shutdown systems, the "1-out-of-3" mode (action triggered by 1 channel) improves emergency response speed.

• Fault Self-Shielding & Alarm: When a single channel experiences open circuit, short circuit, or signal drift, the module automatically marks the faulty channel as "invalid" and excludes it from voting. Simultaneously, it uploads fault information (e.g., "Channel 5 short circuit fault") to the controller via the backplane bus, and the yellow LED on the module front panel illuminates. Maintenance personnel can locate faulty channels via HMI and replace modules without shutting down the system, increasing system availability to 99.9995%.

2. High-Precision Signal Acquisition: Adapts to Complex Industrial Scenarios

• Low-Latency Rapid Response: With a signal response time of ≤5ms (typical 3ms)—far faster than traditional dual-redundant modules (≥10ms)—it meets the needs of emergency interlock scenarios. In reactor overpressure interlocks, when a pressure switch is triggered (switching from "normal" to "alarm"), the module acquires the signal and transmits it to the controller within 3ms, and the controller triggers pressure relief valve action within 5ms, resulting in a total response time of ≤8ms to prevent reactor overpressure accidents.

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• Adaptive Signal Types: Supports both dry contact (voltage-free) and wet contact (24V DC) inputs, with input types selectable via software (no additional hardware modifications required). In aseptic pharmaceutical workshops, it can simultaneously acquire 12 channels of dry-contact emergency stop button signals (voltage-free) and 4 channels of wet-contact high-temperature alarm signals (24V DC), simplifying system wiring.

• Software-Configurable Debounce Time: Debounce time (1-200ms) is adjustable to adapt to different input devices. For mechanical contact switches (bounce time: 5-10ms), a 10ms debounce time prevents false alarms caused by contact bounce; for photoelectric sensors (bounce time: ≤1ms), a 1ms debounce time ensures rapid signal acquisition.

3. Extreme Environment Protection: Ensures Long-Term Stable Operation

• Multi-Layer Electromagnetic Isolation: With inter-channel and channel-backplane isolation voltage of ≥2.5kVrms, plus ±8kV ESD protection, it resists strong electromagnetic interference. In blast furnace gas recovery systems of steel plants—where 10kV high-voltage frequency converters are present—the error of gas pressure switch signals acquired by the module is ≤0.1%, with no false signal triggers.

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• Wide-Temperature & Corrosion Resistance: Its -40℃ to 70℃ wide-temperature design uses industrial-grade components (e.g., capacitors with a temperature range of -55℃ to 125℃), ensuring consistent acquisition performance in outdoor oil and gas tank farms (-35℃ in northern winter) or refinery units (65℃ in southern summer). The anti-salt spray coating and IP20 dust protection enable 2 years of corrosion-free operation in the high-salt environment of offshore oil and gas platforms, complying with the ISO 12944-5 C5-M high-corrosion standard.

• Vibration & Shock Resistance: With a vibration tolerance of 2g (10-500Hz) and shock tolerance of 15g (11ms), it avoids solder joint detachment or interface loosening in underground mine blasting environments, ensuring reliable acquisition of underground ventilation system fault signals.

4. Intelligent Diagnosis & Easy Maintenance: Reduces Management Costs

• Full-Chain Fault Diagnosis: Supports channel-level (open circuit, short circuit, overvoltage) and module-level (power, communication, voting unit) fault diagnosis, with a diagnosis coverage of ≥99.5%. When the module power supply voltage drops below 18V DC, it immediately outputs a "power undervoltage fault" signal to alert maintenance personnel to check rack power supply.

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• Intuitive Status Indication & Hot Swapping: The module front panel is equipped with 3 groups of LED indicators (Power: Green, Normal: Green, Fault: Red, Voting Abnormality: Yellow), allowing maintenance personnel to judge operation status without connecting software. It supports hot swapping (with hot-swap rack configuration), enabling replacement of faulty modules during system operation without interrupting signal acquisition.

• Seamless System Integration: Compatible with all TRICONEX Tricon controllers, it enables data interaction via a proprietary backplane bus (no additional communication modules required). The TriStation 1131 software provides a graphical configuration interface for batch setting of input types, voting logic, and debounce time, and automatically generates test reports after configuration—shortening integration time by 40% compared to traditional modules.