Universal controller for common transmitters
31 March 2008
The Rosemount 3490 Series of Universal Control Units is designed to provide comprehensive control functionality when used with any 4-20mA or HART compatible transmitter. The units configure transmitters and provide display, calculations, logging and control outputs. The controller performs a variety of calculations on the signal received from the transmitter, for example, translating level into volume or flow.
Suitable for wall or panel mounting in a non-hazardous area, the controller provides an intrinsically safe 24V dc power supply to the transmitter which may be mounted in a hazardous area. The power supply is fully protected and there is no need for any external intrinsic safety barrier.
The units can be used as a local display for any HART compatible or 4-20mA device. The display will show the measured value of any of the HART variables of the transmitter together with units and the controller relay status. There are five voltage free SPDT relays for the control of pumps or to trigger alarms in other equipment.
When a Rosemount 3100 Series Ultrasonic Level Transmitter or 3300 Series Guided Wave Radar HART transmitter is connected, the controller will recognise the transmitter, allow selection of variables to be processed, and allow full access to and programming of the transmitter configuration parameters, eliminating the need for any other HART programming device.
When any other HART transmitter is connected, the control unit will enable communications and allow programming of the universal and common practice HART commands.
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