SKU: 3700A

Triconex Invensys 3700A TMR High-Density Analog Input Module

The Triconex 3700A is a high-density, TMR Analog Input Module providing ±0.05% accuracy and 100 Hz sampling for safety-critical DCS environments. Designed for SIL 3 compliance, it supports 0-10V and 4-20mA signals to ensure maximum reliability and process uptime in industrial safety systems.

Product Description

The Triconex 3700A functions as a critical component within the Tricon Triple Modular Redundancy (TMR) system by providing high-integrity signal acquisition. This module specifically targets environments where process interruptions can lead to safety hazards or significant financial loss. By employing three isolated input paths, the 3700A continuously votes on incoming data to eliminate single points of failure, thereby maintaining the highest levels of system availability.

Furthermore, the module excels in high-speed data environments. It captures 100 samples per second, which allows the control system to monitor rapid process fluctuations with extreme precision. Because the 3700A supports standard industrial ranges such as 0-10 VDC and 4-20 mA, engineers can easily integrate it with a vast array of pressure, temperature, and flow transmitters. This versatility ensures that the module remains a staple in modernizing Distributed Control Systems (DCS) for safety-instrumented functions.

Key Technical Characteristics

Manufacturer: Triconex (Schneider Electric / Invensys)
Model Identification: 3700A
Module Type: Isolated Analog Input (AI)
Input Signal Range: 0 to 10 VDC or 4 to 20 mA (DC coupled)
System Resolution: 12-bit conversion for high-precision measurement
Absolute Accuracy: ±0.05% of full scale plus ±1 digit
Sampling Frequency: 100 Hz (100 samples per second)
Power Requirements: 12 VDC nominal operating voltage
Unit Weight: 1.9 kg
Physical Footprint: 1.0 cm x 40.6 cm x 39.8 cm
Safety Standard: Engineered for SIL 3 rated applications

Operational Applications

Industrial operators utilize the 3700A across several high-reliability domains. Specifically, the module enhances performance in the following areas:

Safety Instrumented Systems (SIS): It provides the reliable data necessary for executing automated safety shutdowns.
Process Monitoring: The high sampling rate allows for detailed trend analysis in volatile chemical reactions.
Environmental Protection: It monitors emission sensors to ensure compliance with strict regulatory standards.
Redundant Control Loops: The TMR architecture supports continuous operation even if one input circuit requires maintenance.