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Product Overview: TRICONEX 3720
The TRICONEX 3720 is a high-integrity Triple Modular Redundancy (TMR) analog input module engineered for precision measurement and monitoring of temperature and process variables in safety-critical industrial environments. As a key component of the TRICONEX Tricon V9 safety platform, this module specializes in interfacing with thermocouples, resistance temperature detectors (RTDs), and millivolt-level sensors, making it indispensable for applications where accurate temperature control directly impacts operational safety and efficiency.
Designed to meet the rigorous demands of industries such as oil and gas, chemical processing, and power generation, the TRICONEX 3720 features 16 differential input channels that support a wide range of sensor types, including Type J, K, T, E, R, S, B thermocouples and PT100 RTDs. Its TMR architecture ensures three independent signal paths process data simultaneously, with a voting mechanism that eliminates erroneous readings caused by single-point failures. This redundancy, combined with built-in cold-junction compensation for thermocouples and lead-wire resistance correction for RTDs, guarantees measurement accuracy within <0.1% of full-scale range (FSR) across an operating temperature range of -40°C to +70°C.
In automation systems, the TRICONEX 3720 acts as a critical bridge between field sensors and safety logic solvers, enabling real-time monitoring of variables like reactor temperatures, turbine exhaust heat, and furnace conditions. Its hot-swap capability allows for online module replacement without system shutdowns, minimizing downtime. By integrating advanced diagnostics—such as open-circuit detection, overrange alerts, and sensor drift monitoring—the TRICONEX 3720 enhances system transparency and simplifies troubleshooting, making it a cornerstone of reliable, compliant safety instrumented systems (SIS) and distributed control systems (DCS).
Technical Specifications: TRICONEX 3720
| Parameter | Value |
|---|---|
| Manufacturer | TRICONEX |
| Product Type | TMR Analog Input Module (Thermocouple/RTD) |
| Physical Dimensions | 263 mm × 58 mm × 28 mm (10.35″ × 2.28″ × 1.10″) |
| Weight | 2.65 kg (5.84 lbs) [net]; 3.8 kg (8.38 lbs) [shipping] |
| Power Requirement | 24V DC ±10% |
| Input Channels | 16 differential channels |
| Sensor Compatibility | Thermocouples (J, K, T, E, R, S, B); PT100 RTDs (3-wire/4-wire) |
| Accuracy | <0.1% of FSR (0°C to 60°C); <0.2% of FSR (-40°C to +70°C) |
| Response Time | <100 ms (thermocouples); <200 ms (RTDs) |
| Operating Temperature | -40°C to +70°C |
| Certifications | IEC 61508 (SIL 3), CE, UL, ATEX/IECEx (Zone 2) |
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Related Products: TRICONEX 3720
- TRICONEX 3700A: A TMR analog input module for voltage signals (0–5V DC), ideal for pressure and flow sensor integration where voltage-based measurements are required.
- TRICONEX 3701: A current-input TMR module supporting 4–20mA signals, used for monitoring transmitters in process control loops.
- TRICONEX 3703E: An isolated TMR analog input module with enhanced noise immunity, suitable for high-electromagnetic interference (EMI) environments.
- TRICONEX 3503E: A digital input module for 24V AC/DC discrete signals, complementing the 3720 by monitoring switch states and alarm contacts.
- TRICONEX 3601E: A digital output module with relay contacts, enabling the 3720’s measured data to trigger actuators like valves or shutdown systems.
- TRICONEX 4351B: A communication gateway module that connects the 3720 to Modbus, Ethernet/IP, and other industrial networks for data aggregation.
- TRICONEX 8310: A redundant power supply module providing stable 24V DC power to the 3720 and other Tricon platform components.
- TRICONEX 9566-711: A specialized termination panel for the 3720, offering surge protection and easy wiring for thermocouple/RTD sensors.
Main Features and Advantages: TRICONEX 3720
The TRICONEX 3720 delivers unmatched measurement reliability through its TMR architecture, which eliminates single points of failure by processing signals across three independent channels. This redundancy ensures continuous operation even if one channel malfunctions, a critical feature for safety-critical processes where data loss could lead to equipment damage or safety hazards.
Its versatile sensor compatibility allows seamless integration with the most common industrial temperature sensors, reducing the need for multiple specialized modules. Advanced signal conditioning—including cold-junction compensation for thermocouples and automatic lead-wire resistance correction for RTDs—ensures consistent accuracy regardless of environmental conditions, such as ambient temperature fluctuations or cable length variations.
The TRICONEX 3720 also excels in diagnostic transparency. Real-time monitoring of channel health, sensor faults, and module status provides early warning of potential issues, enabling proactive maintenance. Its hot-swap design allows technicians to replace the module during operation, minimizing unplanned downtime. Additionally, the module’s robust EMC immunity (compliant with IEC 61000-4) ensures stable performance in environments with high electrical noise, such as near motors or high-voltage equipment.
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Installation and Maintenance: TRICONEX 3720
Pre-installation Preparations:
Before installing the TRICONEX 3720, verify that the control system’s power supply provides stable 24V DC ±10% and that the chassis is properly grounded to prevent EMI interference. Use the dedicated termination panel (e.g., TRICONEX 9566-711) for sensor wiring, ensuring correct polarity for thermocouples and proper lead-wire configuration for RTDs (3-wire or 4-wire as specified). Update the module’s firmware to the latest version to ensure compatibility with the Tricon V9 platform and access to the latest diagnostic features.
Before installing the TRICONEX 3720, verify that the control system’s power supply provides stable 24V DC ±10% and that the chassis is properly grounded to prevent EMI interference. Use the dedicated termination panel (e.g., TRICONEX 9566-711) for sensor wiring, ensuring correct polarity for thermocouples and proper lead-wire configuration for RTDs (3-wire or 4-wire as specified). Update the module’s firmware to the latest version to ensure compatibility with the Tricon V9 platform and access to the latest diagnostic features.
Maintenance Suggestions:
Regular maintenance of the TRICONEX 3720 includes visual inspections for loose connections, corrosion, or physical damage, especially in high-vibration or humid environments. Use the Tricon diagnostic software to run periodic channel tests, verifying accuracy against calibrated reference sensors. Clean the module’s ventilation slots periodically to prevent dust buildup, which can affect thermal performance. For long-term storage, keep the module in a dry environment with humidity below 80% and temperature between -20°C and +60°C, avoiding exposure to direct sunlight or corrosive gases.
Regular maintenance of the TRICONEX 3720 includes visual inspections for loose connections, corrosion, or physical damage, especially in high-vibration or humid environments. Use the Tricon diagnostic software to run periodic channel tests, verifying accuracy against calibrated reference sensors. Clean the module’s ventilation slots periodically to prevent dust buildup, which can affect thermal performance. For long-term storage, keep the module in a dry environment with humidity below 80% and temperature between -20°C and +60°C, avoiding exposure to direct sunlight or corrosive gases.
Application Fields: TRICONEX 3720
The TRICONEX 3720 is widely deployed in industries where precision temperature monitoring is critical to safety and quality. In oil and gas refineries, it monitors reactor temperatures during catalytic cracking processes, ensuring optimal conversion rates while preventing overheating that could cause equipment failure or hazardous material releases. In chemical plants, it tracks temperatures in polymerization reactors and distillation columns, enabling precise control of reaction rates and product purity.
Power generation facilities rely on the TRICONEX 3720 to monitor turbine exhaust temperatures, generator windings, and boiler tubes, protecting expensive equipment from thermal stress. In pharmaceutical manufacturing, it ensures consistent temperatures in sterilization autoclaves and freeze-drying units, maintaining compliance with FDA regulations. The module also finds applications in food and beverage processing, where it controls oven temperatures and refrigeration systems to preserve product quality and safety.
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Product Guarantee: TRICONEX 3720
Our company offers a one-year quality warranty for the TRICONEX 3720, covering hardware defects not caused by improper installation, misuse, or environmental damage. During the warranty period, we provide prompt replacement of faulty modules, supported by our extensive global supply chain network to minimize downtime. Our technical support team, with deep expertise in TRICONEX products, offers 24/7 assistance for installation guidance, troubleshooting, and system integration. As a leading industrial control distributor with 17 years of experience, we maintain large stocks of both active and discontinued models, ensuring rapid fulfillment of urgent spare part requests to keep your operations running smoothly.
Contact Information
WhatsApp: +86 18859254943
E-mail: sales@ygplc.com
WhatsApp: +86 18859254943
E-mail: sales@ygplc.com
