Red Industrial

Getting measurement and control signals to and from your instruments is central to your automation strategy.  Yokogawa supports a wide variety of Fieldbus technologies, including conventional 4-20mA, wired digital networks, and wireless ISA100.11a.  These technologies are employed at the device, host, and solution level, depending on your needs.

  • Data acquisition measurements (voltage, analog voltage, analog current, and themocouples) across large physical distances can prove challenging. Wireless I/O networking dramatically reduces thermocouple wire and CAT5 cabling, enabling remote monitoring.

  • Our easy-to-connect network converters connect RS485 devices or analog signals to DeviceNet communication PLCs.

  • The flexibility of wireless solutions enables less investment in infrastructure while providing greater insights into plant operations.

  • Yokogawa offers a variety of communication protocols; including, FOUNDATION Fieldbus, HART, BRAIN, ISA100, Profibus, and Modbus to help support smart devices in this evolving digital communication technology.


Una planta de energía en el noreste estaba bajo presión para cumplir con los requisitos de la EPA de la presentación de informes de consumo de combustible (utilizado para el monitoreo de las emisiones). El problema era excavar una zanja costosa de la casa de la bomba al edificio de la sala de control con el fin de administrar el cable de fibra óptica que emitía una señal del medidor de flujo para el historial de la planta en donde se podrían generar informes. El costo hubiera sido de $20,000.00 por la sola excavación de la zanja.


La Planta contiene numerosos lugares de desagüe de los medidores. Estas ubicaciones remotas deben ser monitoreados y las señales de flujo introducidas en el sistema DCS. Hay alimentación AC disponible en cada sitio, pero actualmente no hay manera de traer señales analógicas a lo largo de la infraestructura existente. Cada lugar tendrá instalado un medidor de flujo magnético Yokogawa AXF. Los (4) sitios actuales que figuran a continuación tendrán que ser conectados a la Planta Química Suwanee River. No habrá más sitios adicionales en el futuro.


The site consists of (10) remote wells with one central location that will collect all the data and have it available via Modbus TCP into the plant's DCS. Each well site has (1) 4-20 madc input from a flow meter, along with (1) DO signal to start the pump and (1) DI to read back the pump status. There is AC power available at each site. A path study was done before based on the GPS coordinates given for each site.


March 2007

Here's how Shell upgraded from a pneumatic instrumented plant to a fully digital control system.



Decades of operation, modernization and expansion have left many chemical plants with a somewhat haphazard automation mix of different controls, process control systems, remote I/Os and field devices. The various components may use different communication protocols such as HART, PROFIBUS or FOUNDATION Fieldbus, and are often based on different device integration technologies. 


The changes in social environment, such as globalization of enterprise activities, depletion of natural resources, and eco-oriented movement will affect the structure of mass production. Control systems must be prepared with flexibility and scalability in both size and function to adjust to the changes.

Yokogawa Technical Report

To configure a compact, low-power medium attachment unit for field buses, i.e., a fieldbus MAU, an IC comprising a power generator, transmitter/receiver and other functions is needed. While we at Yokogawa had already developed a fieldbus MAU IC, we have now developed another MAU IC that includes large-scale design changes made mainly to comply with the low-power signaling requirements of the fieldbus specifications. 


Progress in digital signal processing and network technologies has enabled advanced functions which cannot be achieved by traditional field devices with 4-20 mA signal, to be implemented on field devices. Standardization of international fieldbus specifications, notably the FOUNDATION™ Fieldbus, has enabled users to build optimum field networks comprised of freely chosen field devices from various device vendors.

Especificaciones Generales

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