AUXILIARIES: Easy-To-Use Controllers and Indicators

Compact units are meant for 'rugged' processing applications.

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Large, backlit LCD displays, which use clear text messages instead of mnemonic codes, make the new UPR900 process indicator and ATC990 pressure/temperature controller from Dynisco, Franklin, Mass. are said to significantly easier to use than earlier-generation devices. Network and Internet connectivity via the Modbus protocol simplifies programming, process monitoring/control and data-logging. Both units are compact 1/4 DIN units that are IP66 rated for use in rugged plastics processing applications.

Set-up of both devices is quick and easy, thanks to a step-by-step configuration wizard that opens automatically the first time the unit is powered up. In day-to-day use, a menu-driven user interface simplifies operation and increases flexibility. Modbus RS-485 and Modbus TCP Ethernet communication are supported so that any networked computer can connect directly to the controller.       

Programming can be completed off-line using optional configuration and commissioning software and then easily uploaded via the network or the USB port on the face of the unit. Using the real-time clock and data-logging option, users can record process values, set points and alarms and output them as .csv files for analysis or to support an enterprise-management system.

The new Dynisco ATC990 is a discrete, auto-tuning controller that is ideal for managing critical process parameters such as polymer melt pressure or temperature on an extruder. Standard inputs include strain gage, thermocouple or linear (dc-voltage or milliamps), and the unit can also control differential pressure when an optional secondary strain gage input is used. Other useful display information includes alarm set points, peak values, error conditions, and engineering unit beacons.

The new UPR900 from Dynisco can display a range of engineering units related to standard strain gage, thermocouple or voltage/current inputs. An optional secondary input makes it possible for the user to display pressure and temperature simultaneously. If the two inputs are selected as pressure inputs, the user could monitor differential pressure – on a melt screen changer, for instance. Analog retransmission of process variables allows the signal to be sent to other devices.