Description
Technical Specifications
- Product Model: 3700
- Brand: TRICONEX
- Warranty: One Year
- Input Voltage: 24 V DC backplane
- Operating Temperature: 0°C to +60°C
- Storage Temperature: -40°C to +85°C
- Response Time: 55 ms input update rate
- Protection Class: IP20
- Accuracy Class: <0.15% of FSR (0° to 60°C)
- Output Frequency: N/A (analog input)
- Rated Current Range: 0-20 mA (250 Ω shunt); 0-5 VDC
- Communication Interface: Tricon backplane; requires External Termination Panel (ETP)
- Supported Protocols: TMR mid-value selection voting
- Overload Capacity: 150 VDC/115 VAC continuous protection
- Dimensions: 39 × 1.5 × 37 cm; ≈2 kg
Product Overview
The TRICONEX 3700 is a 32-channel differential DC-coupled TMR analog input module for Tricon safety systems, converting 0-5 VDC or 0-20 mA field signals from transmitters into three independent digital values for mid-value selection voting. It solves measurement integrity challenges in ESD, HIPPS, and process control by providing three isolated A/D converters per point, ensuring accurate data despite single-channel failures. Process engineers in oil & gas, refining, and power benefit from its high common-mode rejection (-80 dB DC-100 Hz), 30 MΩ input impedance, and continuous diagnostics covering each channel. Requiring ETP panels for field termination, the 3700 supports hot-spare replacement while maintaining SIL 3 loops. With 12-bit resolution and <0.15% accuracy across 0-60°C, it delivers reliable pressure, temperature, level, and flow data essential for safety-critical decisions in harsh industrial environments. (159 words)
Key Functions
Triple Independent A/D Conversion
Three separate analog-to-digital converters process each input point simultaneously, feeding mid-value selection to main processors. Single converter failure doesn’t affect voted output accuracy.
High Common-Mode Rejection
-80 dB rejection (DC-100 Hz) eliminates ground potential differences and noise coupling between channels. Maintains signal integrity in shared ground cabinets.
Application Scenarios
Safety Transmitter Arrays
Refineries consolidate 32 pressure transmitters into single 3700 cards feeding ESD logic; TMR voting rejects single transmitter drift while diagnostics flag failing loops.
Turbine Monitoring
Power plants read bearing temperatures and vibration signals; common-mode rejection filters motor noise while three-channel processing prevents spurious trips from pickup failure.
HIPPS Pressure Sensing
Gas plants monitor high-pressure headers; 55 ms update rate keeps protection logic current while overrange protection handles proof-test spikes without damage.
Distillation Column Control
Petrochemical units track multiple tray temperatures; hot-spare capability allows card replacement during turnarounds without losing column safety envelope monitoring.
Enjoy Chat and Email support in below
Email: [email protected]
