TRICON 3721 may refer to the 3721 TMR analog input module or related system card under the TRICONEX brand.The following is a detailed introduction to it:
1.Basic information
Brand:TRICONEX(may also appear in the form of Invensys Triconex),which belongs to Invensys.
Model:3721 TMR or AI3721 for short(may vary on different platforms or documents).
Origin:United States.
2.Technical features
Triple redundant structure(TMR):TRICON 3721 adopts a triple redundant design to improve the reliability and fault tolerance of the system.On the analog input module,each of the three channels asynchronously measures the input signal and puts the result into a value table,which is passed to the relevant main processor module through the corresponding I/O bus,and the main processor selects the intermediate value as the valid data.
Analog input function:This module provides analog input function and is suitable for various industrial control occasions.
Multiplexer:The TRICON 3721 analog input module provides two independent 1×20 bipolar multiplexers suitable for general-purpose switching,including temperature measurement.In addition,the analog backplane connection relay can be automatically connected to the 3700A series host backplane and optional DMM.
Channel configuration:In addition to the 40 channels,two fused channels are provided for current measurement.In addition,this model includes dedicated inputs to achieve 40 channels of four-wire common-side ohm measurement.
3.Application fields
TRICON 3721 is widely used in chemical,paper,power generation,oil,natural gas and other industrial fields,as an important accessory of the control system,it plays a key role.
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