Electric part-turn actuators - AUMA - #19

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Parallel signal transmission to the DCS - AC Compared to the AM, the AC offers a large number of feedback signals. The plant operator decides which signals are to be transmitted. Assignment of outputs and inputs, if available, can be modified at a later date via the AC device setting. Depending on the version, the AC provides: â–  Up to ten binary inputs e.g. operation commands OPEN, STOP, CLOSE; intermediate position control; release signals for local controls, emergency commands, etc. â–  Up to twelve binary outputs e.g. for feedback of end positions, intermediate positions, selector switch position, failures, etc. â–  Up to two analogue inputs (0/4 – 20 mA) e.g. setpoint for controlling the positioner â–  Up to two analogue outputs (0/4 – 20 mA) e.g. for feedback of valve position or torque The binary inputs and outputs are potential-free, analogue outputs are galvanically isolated. Serial communication via fieldbus AM and AC AUMA permanently keep track on further developments of fieldbus protocols and consequently implement all elements of vital importance for valve automation applications. Both AM and AC are available with fieldbus interfaces. However, AC controls offer larger varieties and considerably more functions. AC upgrading is possible. Consequently, AC controls can be adapted to future developments. Today, the controls are available with the following fieldbus interfaces: AM Profibus DP Profibus DP-V1 and DP-V2 Modbus RTU Foundation Fieldbus AC â–  â–  – â–  â–  – â–  â–  Fieldbus interfaces can be combined within a device equipped with parallel interfaces. For further information on fieldbus systems, please refer to the following pages. [3] [1] AC as fieldbus data transmitter As an option, an AC with fieldbus interface can be supplied with four binary and/or two analogue inputs [1]. They are used to connect conventional sensors [2] to the AC. The AC processes the sensor data for transmission via the fieldbus [3]. [2] | 19