Two-wire field-mounted process device
First Claim
1. A two-wire field-mountable process device comprising:
- a power module couplable to a two-wire process control loop and adapted to wholly power the process device with power received from the two-wire process control loop;
a loop communicator coupled to the power module, and being couplable to the two-wire process control loop to communicate on the loop;
a controller coupled to the loop communicator and power module;
a first channel operably coupled to the controller and the power module and electrically isolated from the process device, the first channel configured to couple to at least a first process interface element through a plurality of first terminals; and
a second channel operably coupled to the controller and the power module and electrically isolated from the process device, the second channel being configured to couple to at least a second process interface element through a plurality of second terminals.
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Accused Products
Abstract
A two-wire field-mounted process device with multiple isolated channels includes a channel that can be an input channel or an output channel. The given input or output channel can couple to multiple sensors or actuators, respectively. The process device is wholly powered by the two-wire process control loop. The process device includes a controller adapted to measure one or more characteristics of sensors coupled to an input channel and to control actuators coupled to an output channel. The controller can be further adapted to execute a user generated control algorithm relating process input information with process output commands. The process device also includes a loop communicator that is adapted to communicate over the two-wire loop.
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Citations
28 Claims
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1. A two-wire field-mountable process device comprising:
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a power module couplable to a two-wire process control loop and adapted to wholly power the process device with power received from the two-wire process control loop;
a loop communicator coupled to the power module, and being couplable to the two-wire process control loop to communicate on the loop;
a controller coupled to the loop communicator and power module;
a first channel operably coupled to the controller and the power module and electrically isolated from the process device, the first channel configured to couple to at least a first process interface element through a plurality of first terminals; and
a second channel operably coupled to the controller and the power module and electrically isolated from the process device, the second channel being configured to couple to at least a second process interface element through a plurality of second terminals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A two-wire field-mountable process device comprising:
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a power module couplable to a two-wire process control loop and adapted to wholly power the process device with power received from the two-wire process control loop;
a loop communicator coupled to the power module, and being couplable to the two-wire process control loop to communicate on the loop;
a controller coupled to the loop communicator and power module, and adapted to provide a process variable output;
a memory module coupled to the power module and the controller, the memory module being adapted to store a user-generated control algorithm relating the at least one process variable to the process output. an input channel operably coupled to the controller and the power module and electrically isolated from the process device, the input channel being adapted to receive at least one sensor input; and
wherein the controller computes the process variable based at least in part upon a sensor signal received through the at least one sensor input and the user-generated control algorithm. - View Dependent Claims (21, 22)
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23. A two-wire field-mountable process device comprising:
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a power module couplable to a two-wire process control loop and adapted to wholly power the process device with power received from the two-wire process control loop;
a loop communicator coupled to the power module, and being couplable to the two-wire process control loop to communicate on the loop;
a controller coupled to the loop communicator and power module, and adapted to provide a process variable output based upon at least one process variable;
a memory module coupled to the power module and the controller, the memory module being adapted to store a user-generated control algorithm relating the at least one process variable to the process variable output; and
an output channel operably coupled to the controller and the power module and electrically isolated from the process device, the output channel being adapted to provide an output based upon a command signal from the controller; and
wherein the controller provides the command signal to the output channel based upon the at least one process variable and the user-generated algorithm. - View Dependent Claims (24, 25)
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26. A field-mountable two-wire process device comprising:
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means for wholly powering the process device with power received from a two-wire process control loop;
means for communicating over the two-wire process control loop;
means for performing input/output; and
means for performing a user-provided control algorithm based at least in part information received from the means for performing input/output.
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27. A method in a field-mountable two-wire process device for providing a process variable, the method comprising:
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wholly powering the process device with a two-wire process control loop;
selectively coupling the process device to a first sensor through a first isolated channel to measure a first characteristic of the first sensor;
selectively coupling the process device to a second sensor through a second isolated channel to measure a second characteristic of the second sensor;
computing a process variable based on at least one of the first and second measured characteristics; and
providing a process variable output based on the computed process variable.
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28. A method in a field-mountable two-wire process device for providing a process variable, the method comprising:
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wholly powering the process device with a two-wire process control loop;
coupling the process device to at least one sensor to measure at least a first characteristic of the sensor;
computing a process variable output based on operation of an user-generated algorithm and at least the first characteristics; and
providing the process variable output.
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Specification