Yokogawa Electric has released the UT35A (quarter DIN size) and the UT32A (one-eighth DIN size), two entry-level models in the UTAdvanced series of digital indicating controllers.
These low-cost models, which replace Yokogawa's UT300 range, have a sequence-control function that is based on the general-purpose ladder-logic programming language and are targeted for use in the single-loop control of production equipment.
The UTAdvanced Series adopts an open system architecture with an Ethernet communications interface.
They are compatible with Modbus/TCP protocol and, as an option, with the Profibus DP protocol.
As well as eliminating the need for dedicated communication programs and converters for connecting to devices such as data-acquisition units and/or PLCs, this feature makes it easy to develop optimal multi-vendor systems for users.
Indicating controllers are embedded in industrial furnaces and other relatively small-scale production-line equipment and installations, and are used to measure, display and control various types of data, including temperature, pressure and flow rate.
Yokogawa's UTAdvanced series of digital indicating controllers features sequence control based on the ladder-logic programming language.
The first models in this series, the UT55A and UT52A, integrate peripheral devices such as relays.
These indicating controllers have a range of control-function modes, with the most capable units able to perform full cascade control for controlling relatively complex installations such as continuous furnaces.
Yokogawa is releasing the UT35A and UT32A entry-level models to meet the need for general-purpose indicating controllers that have only the functionality needed for controlling single-loop production equipment.
The models have a fixed control-scan period of 200ms and 300 steps for ladder programming, compared with the three control-scan periods and 500 steps in the UT55A and UT52A models.
The UT35A and UT32A also include a ladder-language-based sequence-control function; support of the Ethernet or RS485 interfaces and Modbus or Profibus-DP communication protocols; a colour LCD display; and operation-guidance functions, including navigation keys.
Also included is a user-default function.
It is possible to reset the unit to factory-default settings and for the user to define their own default profile, to which it is possible to return.
This means that an engineer can always quickly revert to a known working setup profile without starting again from scratch or having to load a configuration file from a PC.
Main target markets for the controllers are machining facilities industries including electrical equipment, machinery, chemicals, foods, semiconductors and automotive manufacturing.
