Invensys Triconex 3805E TMR Analog Input Modules

Output current range: 4-20mA and 20-320mA

Number of output Points: 6(4-20mA ); 2(20-320mA)

Isolated points: No, commoned return,DC coupled.

Resolution:12 bits

Output Accuracy: <0.25%(in range of 4-20mA) of FSR(0-21.2mA and 0-339.2mA),from 32° to 140°F(0°C TO 60°C) 

External loop power(reverse voltage protected): +42.5 VDC, maximum;+24 VDC, nominal

Over-range protection: +42.5VDC, continuous

Switch time on leg failure: <10ms, typical

Multi-Channel Digital I/O and Control: Triconex 3805E Supports multiple digital input/output channels, enabling simultaneous monitoring and control of numerous devices in industrial automation systems. This design optimizes space efficiency and reduces the need for additional hardware;Capable of processing rapidly changing digital signals, ensuring real-time responsiveness in dynamic environments;Integrates noise reduction and interference suppression features to enhance signal accuracy in electrically noisy settings.

Advanced Logic and Trigger Functions: Built-in logic operations (e.g., AND, OR, NOT) allow users to customize digital signal processing for complex control tasks .Executes output actions based on predefined conditions, enabling automated responses to specific system states.

Robust Safety and Reliability: Designed with triple modular redundancy (TMR) architecture, ensuring continuous operation even in the event of hardware failures. This makes it suitable for Safety Instrumented Systems (SIS) requiring SIL 3 certification per IEC 61508 standards .Continuously monitors module health, detects faults (e.g., open loops, hardware errors), and activates alarms for prompt maintenance. Faulty channels can be isolated without disrupting overall operations .

Flexible Communication and Integration: Supports Modbus, Profibus, and Ethernet protocols, facilitating seamless integration with other control systems and industrial networks .Allows online replacement of modules without system shutdown, minimizing downtime in critical applications.

Environmental Durability: Functions reliably in temperatures from -40°C to +70°C and humidity levels up to 95%, making it suitable for harsh industrial environments .Provides 1,500 Vrms isolation between channels and supports overvoltage protection (up to 150 VDC/115 VAC), safeguarding against electrical surges.

Application Versatility: Used in sectors like oil and gas, power generation, chemical processing, and water treatment for tasks such as emergency shutdowns, safety interlocks, and process monitoring .Modular architecture allows integration with other Triconex components (e.g., analog I/O modules, communication cards) to build comprehensive safety and control systems.

Technical Specifications: Intel Pentium 4 with 1 GB memory and 40 GB storage for efficient data handling.Operates on 24V DC, with redundant loop power sources (PWR1/PWR2 indicators) for enhanced reliability.

Continuous Process Monitoring in Petrochemical Plants: 4-wire interfaces to 4–20mA transmitters (e.g., pressure, temperature, flow) in distillation columns and catalytic crackers Detects out of limit or over limit process conditions (e.g., reactor overpressure) and activates shutdown sequences through the TMR controller to save equipment damage Built-in channel-to-channel isolation prevents cross-talk between hazardous area signals.

Boiler & Steam System Protection (Power Generation): Watches over steam drum level and superheater temperature in coal/gas-fired power plants; Makes use of 3-way voting logic to validate the reading of sensor; Reduces false trips due to sensor failing or false reading; Initiates emergency feedwater with drainor turbine run-down on critical trips.

Fiber Optic Acoustic Discharge Monitoring: Monitors hydrocarbon gases for acoustic discharges which precede pipeline failure, issuing alarms in accordance to pressure declines or abnormal flow profiles suchas those which occur when a pipeline is breached; Automatically qualify potential releases with an easy to configure set of rules.

Nuclear Reactor Coolant Monitoring: Interface with RTDs and neutron flux sensors in nuclear power plants; Drift compensation for ensuring long term measurement accuracy; Software for performing automaticSCRAM (emergency shutdown) if coolant temperature does not lie within allowable bounds.

Pharmaceutical Batch Process Safety: Control pH probes and DO probes in bioreactors during vaccine manufacturing; Monitors CPPs and triggerssterile shutdowns to ensure product quality, FDA 21 CFR Part 11 compliant for audit trail and data integrity.

Designed to provide fail-safe performance in harsh environmental conditions allowing less spurious trips, the Triconex 3805E is ideal in markets where theintegrity of the analog signals is key to safety and operational continuity.