🔧 TRICONEX 3721 Analog Input Module — SIL 3 Certified Safety Solution

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🧠 Product Overview

The TRICONEX 3721 is a high-integrity analog input module designed for use in safety instrumented systems (SIS) and emergency shutdown (ESD) applications. It is part of the Triconex Trident safety system, certified up to SIL 3 in accordance with IEC 61508, making it suitable for critical applications in industries such as oil and gas, chemical processing, petrochemicals, and power generation.

This module utilizes a Triple Modular Redundancy (TMR) architecture, ensuring continuous operation even in the event of a single module failure. It features 32 differential, DC-coupled input channels that support a wide range of analog input signals, including voltage, current, resistance, and temperature, offering flexibility to accommodate various application requirements.

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📊 Technical Specifications

Feature	Specification
Input Range	0 to 5 VDC or -5 to +5 VDC ±6%
Number of Input Points	32 differential, DC-coupled
Input Update Rate	10 ms
Resolution	Programmable to 12 bits or 14 bits
Accuracy	< 0.15% of Full Scale Range (FSR) from 0°C to 60°C
Common Mode Rejection	-85 dB (DC – 100 Hz)
Input Overrange Protection	150 VDC / 115 VAC continuous
Input Impedance (Load)	10 MΩ (DC), minimum
Input Impedance (Power Off)	140 kΩ (DC), typical
Field to System Isolation	800 VDC minimum
Diagnostic Indicators	Pass, Fault, Active, Field
Power Consumption	< 15 W
Operating Temperature	-40°C to +70°C
Weight	1.36 kg
Shipping Weight	4 kg

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🔌 Key Features

• Triple Modular Redundancy (TMR): Ensures high availability and fault tolerance in safety-critical applications.
• Wide Input Range: Supports a variety of analog input signals, providing flexibility for different applications.
• High Accuracy: Offers precise measurements with an accuracy of less than 0.15% of FSR over a wide temperature range.
• Common Mode Rejection: Provides excellent common mode rejection to minimize noise and interference.
• Overrange Protection: Equipped with overrange protection to safeguard against input signal anomalies.
• Diagnostic Indicators: Includes clear diagnostic indicators for easy fault detection and system monitoring.

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🛠️ Installation and Maintenance

The TRICONEX 3721 module is designed for easy integration into Triconex Trident safety systems. It is hot-swappable, allowing for maintenance and replacement without system downtime. During installation, ensure proper grounding and adherence to electrical specifications to maintain system integrity.

Regular maintenance involves monitoring diagnostic indicators and performing system checks to ensure optimal performance. Firmware updates and configuration adjustments can be made through the Triconex engineering workstation, providing a user-friendly interface for system management.

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🏭 Industrial Insight

The adoption of safety instrumented systems (SIS) is increasing across industries as organizations strive to enhance operational safety and comply with stringent regulatory standards. The TRICONEX 3721 module plays a crucial role in this transition by providing reliable and accurate analog input processing in safety-critical applications.

As industries move towards automation and digitalization, the demand for advanced safety solutions grows. The TRICONEX 3721, with its high accuracy, fault tolerance, and flexibility, is well-positioned to meet these evolving needs, ensuring safe and efficient operations in complex industrial environments.

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🔗 More Information

For additional technical details, configuration options, or purchasing inquiries, visit:
➡️ https://www.dcsplcsystem.com/

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📋 Recommended Similar Products

Model	Description	Input Channels	Resolution	Link
TRICONEX 3723	Analog Input Module	32 differential	12/14 bits	View
TRICONEX 3722	Analog Input Module	16 differential	12/14 bits	View
TRICONEX 3724	Analog Input Module	32 single-ended	12/14 bits	View
TRICONEX 3725	Analog Input Module	16 single-ended	12/14 bits	View

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🔧 Precision. Reliability. Safety.
The TRICONEX 3721 is engineered to deliver high-performance analog input processing in safety-critical applications, ensuring operational safety and compliance with industry standards.