TRICONEX 3351 Analogue Input Modules

TRICONEX 3351 Analogue Input Modules

Product Type and Manufacturer

Product Type: Analogue Input Module (also pulse input modules, e.g. AI3351)

Manufacturer: Triconex

Main Specifications and Parameters

Analogue Input Module (Type 3351)

Nominal input current: 4~20 mA

Number of points: 32 points (common)

Operating current range: 2~22 mA DC

Input bandwidth (3dB): 16 Hz

Source Impedance: Unknown (but other relevant electrical parameters are provided)

Weight: 1.5kg (product itself), 3kg (including transport packaging)

Pulse Input Module (Type AI3351)

Number of input signals: 8, non-shared

Input frequency range: 20Hz~20000Hz (operation on lower than 20Hz or higher than 20000Hz is possible, but accuracy and sensitivity should be consulted with Triconex field service engineers)

Accuracy: ±0.01% at 1000~20000Hz, ±0.1% at 100~999Hz, ±1.0% at 20~99Hz

Input diagnostic fault coverage: 0.5% of full scale

Input change sampling period: one scan or 210ms, whichever is greater

Status indicator: 1 per point, module status including PASS, FAULT, ACTIVE

System Features and Functions

TRICONEX 3351, as part of the Tricon control system, has the following features:

High Fault Tolerance: Provides a tri-module redundant structure (TMR) with three identical sub-circuits, each performing a degree of independent control, and able to tolerate harsh industrial environments.

Field Installable: Can be installed in the field and the module level can be installed and repaired in-line in the field without disturbing the field wiring.

Module expandability: Supports up to 118 I/O modules (analogue and digital) and optional communication modules.

Remote Communications Capability: Communication modules can be connected to Modbus hosts and slaves, or to Foxboro and Honeywell Distributed Control Systems (DCS), other Tricons in peer-to-peer networks, and external hosts in TCP/IP networks.

Remote I/O Support: Remote I/O modules up to 12 kilometres from the mainframe can be supported.

Windows NT-based programming: Develops and debugs control programs using programming software for Windows NT-based systems.

Intelligent Functions: Intelligent functions in the input and output modules reduce the workload of the main processor. There are three microprocessors per I/O module.

Comprehensive on-line diagnostics: routine maintenance can be performed while the Tricon is up and running without interrupting the control process.

Hot Standby Support: Provides ‘hot standby’ support for the I/O modules, which can be used in emergency situations where service cannot be provided in a timely manner.

Application Areas

TRICONEX 3351 is widely used in industrial fields that require high reliability and safety, such as oil, gas, chemical and other high-risk industries. The TRICONEX 3351 meets the high demands placed on safety instrumented systems in these industries to ensure the safe operation of plants and facilities.

Installation and Maintenance

Environmental Conditions:

Ensure that the module is installed within the recommended temperature and humidity ranges and avoid direct exposure to water, oil, dust or electromagnetic interference.

Power Requirements:

Use a stable power supply to avoid damage to the module from voltage fluctuations.

Signal Cable Connection:

Connect the signal lines correctly to ensure the accuracy and stability of signal transmission.

Software Configuration:

Correctly configure the software parameters of the module according to the system requirements to ensure compatibility with other parts of the control system.

Maintenance and Inspection:

Perform regular maintenance and inspection of the module, including cleaning and checking the contact status of the connectors.

Precautions

Operator Training:

Operators should receive proper operation and maintenance training to avoid malfunctions or safety accidents caused by incorrect operation.

Technical Documentation and Safety Guidelines:

The technical documentation and safety guidelines provided by the manufacturer should be read and understood in detail before installation and use.

Compliance with safety procedures:

Observe all relevant safety procedures to ensure personal safety, especially when handling high-pressure or high-speed rotating equipment.