TRICONEX 4351B Communication Processor – Industrial Field Data Interconnection, just use it, no problem!

The TRICONEX 4351B is a Triple Modular Redundant (TMR) analog input module engineered for SIL 3 safety-critical applications within the TRICONEX V9/V11 Safety Instrumented Systems (SIS). Manufactured by TRICONEX (Schneider Electric), this module provides high-integrity acquisition of analog process variables like pressure, temperature, and flow rates from 4–20mA/HART field instruments. The TRICONEX 4351B processes each input through three independent 16-bit resolution channels, executing continuous cross-comparison to detect sensor or wiring faults within 15ms. Its fault-masking architecture ensures <0>

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Description

The TRICONEX 4351B is a Triple Modular Redundant (TMR) analog input module engineered for SIL 3 safety-critical applications within the TRICONEX V9/V11 Safety Instrumented Systems (SIS). Manufactured by TRICONEX (Schneider Electric), this module provides high-integrity acquisition of analog process variables like pressure, temperature, and flow rates from 4–20mA/HART field instruments. The TRICONEX 4351B processes each input through three independent 16-bit resolution channels, executing continuous cross-comparison to detect sensor or wiring faults within 15ms. Its fault-masking architecture ensures <0>

TRICONEX 4351B

Technical Specifications

Parameter Name Parameter Value
Product Model TRICONEX 4351B
Manufacturer TRICONEX (Schneider Electric)
Product Type TMR Analog Input Module
Input Channels 8 (isolated)
Signal Ranges 4–20 mA, 0–5V DC, 0–10V DC
HART Support Version 7 (FSK)
Resolution 16-bit
Accuracy ±0.1% of span (4–20mA)
Update Rate 100 ms/channel
Common-Mode Rejection >120 dB @ 60 Hz
Isolation 1500V AC channel-to-system
Power Consumption 200 mA @ 5V DC
Operating Temperature -40°C to +70°C
Safety Certification SIL 3 (IEC 61508), TÜV
Diagnostics Open wire, short circuit, drift detection

Main Features and Advantages

Fault-Tolerant Measurement: Three isolated input circuits per channel continuously validate signals. If any channel deviates >±0.25%, the TRICONEX 4351B automatically isolates the fault while maintaining 2-out-of-3 voting – critical for preventing spurious trips in safety systems.

HART Digital Integration: Bidirectional HART communication enables access to device diagnostics (e.g., sensor drift, calibration status) and online re-ranging via TriStation software, reducing maintenance downtime by 30%.

Advanced Signal Conditioning: Adaptive filtering eliminates noise from VFDs and power lines, while 0.1% accuracy ensures reliable trip decisions during process upsets. Open-wire detection identifies broken sensor connections before they compromise safety functions.

Extreme Environment Operation: Withstands 5g vibration and -40°C cold starts for Arctic drilling sites. Conformal-coated PCB resists corrosive atmospheres in chemical plants.

Application Field

Oil & Gas: Monitors separator pressure in offshore platforms to trigger ESD during overpressure events

Power Generation: Acquires turbine bearing temperature for automatic lube oil system activation

Chemical Plants: Measures reactor jacket steam pressure for runaway reaction mitigation

Pharmaceutical: Tracks sterilizer temperature with FDA-compliant data logging

LNG Facilities: Monitors cryogenic storage tank levels (-162°C) for overfill protection

TRICONEX 4351B

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