ABB PFVO 142 (Model Code:) 3BSE023732R1 is a process input/output (I/O) module in ABB Advant OCS (Open Control System), mainly used for the acquisition and control of on-site process signals in industrial automation scenarios.

 It is one of the core components of the Advant OCS system for realizing the signal interaction of "controller - field device". The following is its detailed technical information and application description:

Core function positioning

PFVO 142, as the distributed I/O module of the Advant OCS system, its core function is to convert the analog/digital signals of field sensors/actuators into digital signals recognizable by the system, 

and at the same time convert the control instructions issued by the controller into analog/digital signals executable by field devices. Specific functions include:

Signal acquisition and conversion: Receive 4-20mA analog signals from the site (such as outputs from pressure, temperature, and flow sensors) or switch signals (such as valve status, equipment start-stop feedback), 

perform filtering and isolation, and then transmit them to the Advant OCS controller (such as MasterPiece 200/300 series).

Control instruction execution: Receive analog control signals (such as valve opening adjustment instructions) or digital output signals (such as equipment start and stop instructions) issued by the controller,

 and drive the field actuators (such as control valves, contactors) to act.

Signal isolation and protection: Built-in electrical isolation circuit to prevent strong electromagnetic interference or voltage fluctuations on site from damaging the system controller, enhancing the stability and anti-interference capability of signal transmission.

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