Foxboro FBM217 P0914TR analog input module

Description

The module can be used as a single unit, or as a redundant pair (two FBM217s). When used as a redundant pair, the modules combine to provide redundancy at the Fieldbus Module (FBM) level, with field input signals received from one common termination assembly though a redundant adapter affixed to the FBMs’ baseplate. The field input current for redundant modules is doubled. A redundant digital input block in the control software validates each input in conjunction with information to/from the module, and selects the input with the highest quality for processing in the control strategy. In a redundant configuration, contact sense power from each module is diode OR’d together in the redundant adapter to assure redundant power. A redundant contact input function block, CINR, is used for each redundant pair of inputs.

The CINR block handles input reads and initialization logic for the redundant channels. On each execution cycle of the CINR block, identical reads are sent to both modules, fully exercising the fieldbus and the logic circuitry of each module. When connected to the appropriate TAs, the FBM217 module provides functionality formerly provided by the 100 Series FBM I/O subsystem. TAs are available which support the functionality of the 100 Series main FBM07A/B, FBM08, FBM20, and FBM24A/B/C (16 input main FBMs). Expansion TAs are available for use with these main FBM TAs to support the functionality of expansion FBM12, FBM13, FBM21, or FBM25A/B/C (16 input expansion FBMs).

Other equipment of the PLC system includes programming equipment: The programmer is an indispensable component for PLC development, application, monitoring, operation, inspection and maintenance. It is used for programming, setting the system, monitoring the working status of the PLC and the system controlled by the PLC, but it does not directly participate in on-site control operation. Small programmer PLCs generally have handheld programmers, and currently are generally programmed by computers (running programming software). That is the upper computer of our system.

HMI: The simplest human-machine interface is indicator lights and buttons. Currently, the application of integrated operator terminals based on LCD screens (or touch screens) is becoming increasingly widespread, and computers are widely used as HMIs.

Finally, the communication networking of PLC can quickly and effectively obtain and transmit production and management data with the help of advanced industrial network technology. So, the importance of networks in automation system integration engineering is becoming increasingly significant, and some even propose the viewpoint that “networks are controllers”.

PLC has the function of communication networking, which enables the exchange of information between PLC and PLC, PLC and upper computer, as well as other intelligent devices, forming a unified whole and achieving decentralized and centralized control. Most PLCs have RS-232 interfaces, and some have built-in interfaces that support their respective communication protocols. The communication of PLC now mainly adopts data communication through Multipoint Interface (MPI), PROFIBUS or industrial Ethernet for networking.

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