Description

The TRICONEX 3351 analog input module is a key component used for high-precision analog signal acquisition in the TRICONEX Trident Safety Instrumented System(SIS).The TRICONEX 3351 module is designed to receive signals from various analog transmitters and sensors on site,such as pressure,temperature,liquid level,and flow rate,and convert these continuous process variables into high-precision digital signals,which are safely and reliably transmitted to the core of the Trident controller for logical processing and safety decision-making.As a key component of the TRICONEX Trident system’s iconic Triple Redundancy(TMR)architecture,the TRICONEX 3351 module typically includes three completely independent analog input channels,each independently processing field data and ensuring the accuracy and reliability of input signals through the system’s internal intermediate value selection or voting mechanism.This design concept effectively eliminates the risk of single point of failure,enabling the TRICONEX 3351 to provide excellent reliability and safety in harsh industrial environments,meeting the safety requirements of SIL 3 level.The TRICONEX 3351 analog input module has high resolution and fast scanning rate,which can provide accurate process variable data and provide a solid data foundation for the implementation of various safety protection functions.

3351 TRICONEX

technical specifications

Product model:3351(also commonly referred to as AI3351)

Manufacturer:TRICONEX(now a brand under Schneider Electric)

Product type:Analog Input Module

Series:Trident

Number of input channels:32(shared reference point)

Nominal input current:4-20 mA DC

Working current range:2-22 mA DC

Absolute maximum input current:50 mA DC

Input bandwidth(-3dB):16 Hz

Source impedance:180Ω

Resolution:12 bits

Absolute error:±0.15%of full scale(20 mA)

Diagnostic function:Each channel has complete online diagnostic functions,including open circuit,short circuit detection,etc

Scanning time:≪1 ms(all 32 channels)

Working temperature:-40°C to+70°C(depending on the specific model)

Relative humidity:5%to 95%(non condensing)

Installation method:Triconex Trident rack slot installation

Main features and advantages

The TRICONEX 3351 analog input module is a key component in building high reliability safety instrumented systems,and its outstanding features and advantages make it the preferred choice for safety critical applications.The most significant advantage lies in its triple redundant(TMR)input channels,where each channel independently collects and processes on-site analog signals,and ensures the accuracy and reliability of input data through the system’s internal intermediate value selection or voting mechanism,thereby eliminating the risk of single point failures and ensuring high availability of the system.TRICONEX 3351 provides up to 32 analog input channels,capable of simultaneously receiving and processing data from multiple on-site analog instruments,meeting the monitoring needs of complex industrial processes.This module has high precision and resolution,and can accurately measure and convert small signal changes,providing reliable process variable data for safety systems.The TRICONEX 3351 has a comprehensive online diagnostic function built-in,which can monitor the status of each input channel in real time,detect and report any potential faults in a timely manner,such as open circuit,short circuit,etc.,facilitating user maintenance and troubleshooting,further improving the safety of the system.In addition,the TRICONEX 3351 has a fast scanning rate and can respond in real-time to process changes,ensuring that the safety system can respond in a timely manner.

3351 TRICONEX

application area

The TRICONEX 3351 analog input module is widely used in various industrial fields with extremely strict safety requirements due to its high precision,high reliability,and comprehensive diagnostic functions.As an important component of Safety Instrumented Systems(SIS),it is used to collect signals from on-site analog meters.Its typical application areas include:

Oil and gas industry:used for critical safety systems such as emergency shutdown systems(ESD),fire and gas detection systems(F&G),and high integrity pressure protection systems(HIPPS),monitoring key process parameters such as pressure,temperature,liquid level,and flow rate.

Chemical industry:applied to process safety control systems,reactor safety protection,leak detection and isolation systems,receiving signals from analog sensors such as pressure transmitters,temperature transmitters,and liquid level transmitters.

Power industry:used for safety interlocking,boiler protection,turbine protection and other systems in power plants,monitoring analog parameters such as pressure,temperature,flow rate of key equipment.

In other high-risk industrial fields,TRICONEX 3351 can provide reliable and accurate analog input signal acquisition for safety monitoring and protection of critical process parameters for automation systems that require SIL 3 or higher safety levels.

Related products

The TRICONEX Trident series products related to the TRICONEX 3351 analog input module include:

TRICONEX 2351:The substrate of the analog input module is used to provide electrical connections and signal interfaces.

TRICONEX AI3721:Other models of analog input modules may have different characteristics or applicable scenarios.

TRICONEX DI3301:Digital input module,used to receive discrete signals on site.

TRICONEX DO3401:Digital output module,used to drive safety actuators.

TRICONEX AO2481:Analog output module,used to control analog actuators.

TRICONEX MP2101/MP2102/MP3008:The main processor module is used to execute security control logic and interact with input modules for data exchange.

Triconex rack:used for installing Triconex 3351 and other Triconex modules.

TriStation 1131:The programming and configuration software for TRICONEX,used for system configuration and diagnostics.

These modules together construct a complete TRICONEX Trident safety instrumented system solution,in which TRICONEX 3351 plays a critical role in collecting safety analog input signals.

Installation and maintenance

Preparation before installation:Before installing the TRICONEX 3351 analog input module and its supporting substrate,please carefully read the installation manual and safety guide of the TRICONEX Trident safety system.Ensure that the installation environment meets the operating temperature,humidity,and EMC requirements of the module.Check if the appearance of the module and substrate is intact,and if the connectors are clean.Insert the TRICONEX 3351 module into its corresponding substrate connector and secure it in the designated slot of the TRICONEX Trident rack.According to the safety wiring diagram,connect the signal line(usually 4-20 mA signal line)of the on-site analog instrument to the corresponding terminal of the substrate.It is necessary to use shielded cables and ground them correctly to reduce noise interference and ensure the accuracy of signal transmission.As it is a safety related equipment,the installation process must be carried out by personnel who have received professional training and possess the qualifications for installing safety instrumented systems.

Maintenance suggestion:In order to ensure the long-term safe and reliable operation of the TRICONEX 3351 analog input module and the entire TRICONEX Trident safety system,it is recommended to strictly follow the maintenance manual provided by TRICONEX for regular maintenance.Regularly check the connection cables between the module and the substrate for looseness or damage,and promptly handle any issues found.Keep the surrounding environment of the module and substrate clean,avoid dust and debris accumulation,which may affect heat dissipation and module operation.Regularly check whether the connected on-site analog instruments are working properly and whether the signal output is stable and accurate.It is recommended to conduct regular system calibration and loop verification to verify the accuracy of analog input channels and the effectiveness of overall safety functions.Any changes to the hardware or wiring of the security system should comply with relevant safety regulations and undergo comprehensive testing and verification.It is recommended that maintenance and repairs be carried out by professionals who have been certified by Triconex or have the corresponding qualifications for maintaining safety systems.

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Product Guarantee

TRICONEX(now a brand under Schneider Electric)provides comprehensive product quality assurance for its 3351 analog input module.All products undergo strict testing and inspection before leaving the factory to ensure that their performance meets technical specifications and safety certification requirements.