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Product Overview
The TRICONEX 3721-C1 is a high-performance analog input module engineered for safety-critical industrial automation systems. As part of the TRICONEX Tricon series, this module is designed to deliver reliable signal acquisition and processing in environments where downtime or errors could lead to catastrophic consequences. With its triple modular redundancy (TMR) architecture, the TRICONEX 3721-C1 ensures continuous operation by simultaneously processing inputs through three independent channels and selecting the median value to mitigate single-point failures. This design not only enhances fault tolerance but also meets the rigorous requirements of Safety Integrity Level (SIL) 3 certification, making it ideal for applications in oil and gas, chemical processing, and power generation.
The TRICONEX 3721-C1 is a high-performance analog input module engineered for safety-critical industrial automation systems. As part of the TRICONEX Tricon series, this module is designed to deliver reliable signal acquisition and processing in environments where downtime or errors could lead to catastrophic consequences. With its triple modular redundancy (TMR) architecture, the TRICONEX 3721-C1 ensures continuous operation by simultaneously processing inputs through three independent channels and selecting the median value to mitigate single-point failures. This design not only enhances fault tolerance but also meets the rigorous requirements of Safety Integrity Level (SIL) 3 certification, making it ideal for applications in oil and gas, chemical processing, and power generation.
Featuring 32 differential input channels, the TRICONEX 3721-C1 supports a wide voltage range of -5 to +5 VDC, enabling seamless integration with sensors measuring temperature, pressure, and flow. Its DC-coupled design minimizes noise interference, ensuring high-precision data acquisition even in electrically noisy environments. The module’s 12/14-bit programmable resolution and ±0.1% full-scale accuracy further contribute to its reputation for delivering reliable and actionable insights. By converting analog signals into digital data for the Tricon system, the TRICONEX 3721-C1 plays a pivotal role in maintaining process stability and compliance with international safety standards such as IEC 61508.
Technical Specifications
| Parameter Name | Parameter Values |
|---|---|
| Manufacturer | TRICONEX |
| Product type | Analog Input Module |
| Input range | 0–5 VDC or -5–+5 VDC (differential) |
| Resolution | 12-bit or 14-bit programmable |
| Accuracy | ±0.1% of full scale |
| Physical dimensions | 176 x 60 x 137 mm (6.9 x 2.4 x 5.4 in) |
| Weight | 1.5 kg (3.3 lbs) |
| Communication protocol | Modbus RTU |
| Operating temperature | -40°C to +70°C |
| Certifications | CE, UL, FM, CSA, ISO 9001 |
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Related Products
- TRICONEX 3700A: A 32-point differential analog input module with a 0–5 VDC range, offering similar TMR architecture but with fixed 12-bit resolution.
- TRICONEX 3703E: Features isolated differential inputs for higher noise immunity, suitable for applications requiring enhanced signal integrity.
- TRICONEX 3625: A communication module that enables seamless integration of the TRICONEX 3721-C1 with other industrial systems via Profibus or Ethernet.
- TRICONEX 5402: A digital output module designed for low-current applications, complementing the TRICONEX 3721-C1 in closed-loop control systems.
- TRICONEX 8312: A power supply module ensuring stable voltage delivery to the TRICONEX 3721-C1 and other Tricon components.
Main Features and Advantages
The TRICONEX 3721-C1 stands out for its fault-tolerant design, which employs TMR technology to ensure uninterrupted operation. Each input channel is processed independently, and the module’s diagnostic capabilities continuously monitor for errors, triggering alarms or redundant switching to maintain system integrity. This resilience is further enhanced by its ability to withstand extreme temperatures (-40°C to +70°C) and harsh industrial conditions, reducing downtime and maintenance costs.
The TRICONEX 3721-C1 stands out for its fault-tolerant design, which employs TMR technology to ensure uninterrupted operation. Each input channel is processed independently, and the module’s diagnostic capabilities continuously monitor for errors, triggering alarms or redundant switching to maintain system integrity. This resilience is further enhanced by its ability to withstand extreme temperatures (-40°C to +70°C) and harsh industrial conditions, reducing downtime and maintenance costs.
Another key strength is its versatility. With support for multiple input ranges and configurable resolution, the TRICONEX 3721-C1 adapts to diverse sensor types, from thermocouples to pressure transmitters. Its DC-coupled differential inputs reject common-mode noise, ensuring accurate readings in electrically noisy environments. The module’s compatibility with Modbus RTU simplifies integration with existing control systems, while its compact form factor allows for easy installation in space-constrained racks.
Compliance with international safety standards (SIL 3, CE, UL) underscores the TRICONEX 3721-C1’s reliability in critical applications. Its hot-swappable design enables online replacement without disrupting operations, a feature particularly valuable in industries where process continuity is paramount. By combining high precision, rugged durability, and advanced diagnostics, this module delivers a compelling solution for industries seeking to optimize safety, efficiency, and operational uptime.
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Installation and Maintenance
Pre-installation preparations: Before installing the TRICONEX 3721-C1, verify the system’s compatibility with Tricon-based architectures. Ensure the chassis provides the required power supply (24 VDC) and that the backplane connectors are clean and undamaged. Use appropriate tools to securely mount the module in the designated slot, following the Tricon system’s mechanical keying guidelines to prevent misalignment. Confirm that the input signals fall within the module’s specified range (0–5 VDC or -5–+5 VDC) and that sensors are calibrated to avoid overloading the channels.
Pre-installation preparations: Before installing the TRICONEX 3721-C1, verify the system’s compatibility with Tricon-based architectures. Ensure the chassis provides the required power supply (24 VDC) and that the backplane connectors are clean and undamaged. Use appropriate tools to securely mount the module in the designated slot, following the Tricon system’s mechanical keying guidelines to prevent misalignment. Confirm that the input signals fall within the module’s specified range (0–5 VDC or -5–+5 VDC) and that sensors are calibrated to avoid overloading the channels.
Maintenance suggestions: Regularly inspect the TRICONEX 3721-C1 for physical damage or loose connections. Use the module’s built-in diagnostics to monitor channel health and identify potential faults. Periodically update the firmware to leverage the latest performance optimizations and security patches. For degraded channels, perform isolated tests to determine if the issue stems from the module or external components. In case of a fault, follow the hot-swapping procedure outlined in the Tricon manual to replace the module without interrupting system operation.
Application Fields
The TRICONEX 3721-C1 excels in safety-critical industries such as oil and gas refining, where it monitors pressure and flow rates to prevent overpressure scenarios. In chemical plants, the module ensures precise control of reaction parameters, minimizing the risk of hazardous releases. Power generation facilities rely on its high accuracy to manage steam turbine operations and grid stability, while wastewater treatment plants use it to monitor pH levels and chemical dosing systems.
The TRICONEX 3721-C1 excels in safety-critical industries such as oil and gas refining, where it monitors pressure and flow rates to prevent overpressure scenarios. In chemical plants, the module ensures precise control of reaction parameters, minimizing the risk of hazardous releases. Power generation facilities rely on its high accuracy to manage steam turbine operations and grid stability, while wastewater treatment plants use it to monitor pH levels and chemical dosing systems.
Its versatility extends to industrial automation applications, including machine control and quality assurance. For example, in automotive manufacturing, the TRICONEX 3721-C1 processes analog signals from torque sensors to ensure consistent assembly quality. In food and beverage production, it monitors temperature and viscosity during pasteurization, maintaining product integrity and regulatory compliance. By providing real-time data and fail-safe operation, the module addresses the dual challenges of productivity and safety across diverse sectors.
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Product Guarantee
Our company offers a one-year quality warranty for the TRICONEX 3721-C1, covering hardware malfunctions unrelated to misuse or improper installation. During this period, we will replace any defective module at no additional cost, ensuring minimal downtime for your operations. For discontinued models or urgent requirements, our global supply chain network enables rapid fulfillment of scarce spare parts, supported by a vast inventory of industrial control components.
Our company offers a one-year quality warranty for the TRICONEX 3721-C1, covering hardware malfunctions unrelated to misuse or improper installation. During this period, we will replace any defective module at no additional cost, ensuring minimal downtime for your operations. For discontinued models or urgent requirements, our global supply chain network enables rapid fulfillment of scarce spare parts, supported by a vast inventory of industrial control components.
With 17 years of experience in distributing industrial automation solutions, we prioritize customer satisfaction through technical expertise and responsive service. Our team of specialists is available to assist with product selection, installation guidance, and post-purchase support, ensuring seamless integration of the TRICONEX 3721-C1 into your system. By choosing our company, you gain a reliable partner committed to sustaining the performance and longevity of your industrial infrastructure.
For inquiries, contact us via WhatsApp at +86 18859254943 or email sales@ygplc.com.
