TRICONEX 3721

Description

1. Product Description

• High-Precision Signal Conversion: Supports 32 differential analog input channels with 12-bit or 14-bit programmable resolution, enabling accurate measurement of voltage (0–5V DC or -5–+5V DC) and current signals. Its ±0.15% full-scale accuracy (FSR) ensures reliable data acquisition even in challenging conditions .
• TMR Architecture: Eliminates single-point failures by processing signals through three independent channels. In the event of a channel fault, the module continues operation with up to two faulty channels, ensuring zero downtime .
• Robust Environmental Tolerance: With an operating temperature range of -40°C to +70°C and IP67 protection, the TRICONEX 3721 withstands extreme temperatures, dust, and water ingress, making it suitable for offshore platforms, refineries, and chemical plants .
• Safety-Critical Design: Features 150V DC/115V AC continuous overvoltage protection and -85 dB common-mode rejection to safeguard against electrical surges and noise interference .

2. Product Parameters

Parameter	Details
Module Type	TMR Analog Input Module (TCM)
Input Channels	32 differential, DC-coupled
Signal Range	0–5V DC or -5–+5V DC (programmable via TriStation software)
Resolution	12-bit or 14-bit (user-configurable)
Accuracy	±0.15% FSR (0°C to 60°C)
Input Update Rate	10 ms
Common-Mode Rejection	-85 dB (DC–100 Hz)
Overvoltage Protection	150V DC/115V AC continuous
Safety Integrity Level	SIL 3 (IEC 61508 certified)
Power Supply	24V DC (18–30V DC input range)
Power Consumption	<10W
Operating Temperature	-40°C to +70°C (storage: -40°C to +100°C)
Certifications	ATEX, IECEx, CSA (hazardous areas), CE

TRICONEX 3721

3. Advantages and Features

• Triple Modular Redundancy (TMR):
  The TRICONEX 3721’s TMR architecture ensures zero downtime during channel failures. In a petrochemical plant case study, this reduced unplanned shutdowns by 35% compared to dual-redundant systems .
• High-Precision Signal Conditioning:
  Supports DC-coupled inputs and 10 ms update rates, enabling real-time monitoring of critical process variables like temperature, pressure, and flow. Its 14-bit resolution enhances measurement accuracy in demanding applications .
• Wide Environmental Range:
  Rated for IP67 protection and extreme temperatures, the module operates reliably in harsh industrial environments, including offshore rigs and high-vibration zones .
• Safety-Critical Design:
  SIL 3 certification and TSAA (Tricon Security Protocol) ensure compliance with the highest safety standards, protecting against unauthorized access and cyber threats .

4. Application Areas and Application Cases

• Oil and Gas: Monitors subsea wellhead pressure and temperature in offshore platforms.
• Power Generation: Integrates with gas turbine control systems for real-time performance optimization.
• Chemical Processing: Enables precise reactor temperature control in hazardous environments.

5. Competition-related Comparison

• Higher Safety Certification: SIL 3 compliance vs. SIL 2 in many competitors.
• Larger Channel Count: 32 differential channels vs. 16–24 channels in comparable modules.
• TMR Redundancy: Full triple-modular redundancy vs. dual-redundant or non-redundant designs.
• Environmental Robustness: IP67 protection vs. IP20–IP54 in most alternatives.
  

  TRICONEX 3721

6. Selection Suggestions

• System Compatibility:
  The TRICONEX 3721 is optimized for TRICONEX Tricon/Tricon CX systems. Verify compatibility with your existing control platform to leverage advanced diagnostics and redundancy features.
• Signal Requirements:
  Choose this module if your application requires high-precision analog inputs (e.g., 0–5V DC) or DC-coupled signals. For AC-coupled or lower-precision needs, consider lower-cost alternatives.
• Safety Needs:
  Opt for the TRICONEX 3721 when SIL 3 certification is mandatory, such as in emergency shutdown (ESD) or high-integrity pressure protection systems (HIPPS).
• Environmental Conditions:
  Ideal for extreme temperatures or corrosive environments. For indoor, low-noise settings, standard analog input modules may suffice.

7. Precautions

• Installation:
  Use shielded cables and follow grounding guidelines to minimize interference. Power down the system before installation to prevent ESD damage.
• Signal Handling:
  Avoid exceeding the 150V DC/115V AC input limit to prevent module damage. Clean connectors with lint-free wipes before mating to ensure signal integrity.
• Maintenance:
  Regularly monitor module health via the TriStation 1131 software, checking for channel faults or signal degradation. Replace faulty modules promptly to maintain redundancy.
• Firmware Updates:
  Update firmware using official TRICONEX tools to access the latest security patches and performance optimizations. Always back up system configurations before updates.