RF ADAPTER FOR FIELD DEVICE WITH LOW VOLTAGE INTRINSIC SAFETY CLAMPING
First Claim
1. An adapter for coupling to a process control transmitter of the type used to monitor a process variable in an industrial process, the adapter comprising:
- a first connection configured to couple to a first side of a two wire process control loop;
a second connection configured to couple to a second side of the two wire process control loop and in series with a first connection to the process control transmitter;
a third connection configured to couple to a second connection of the process control transmitter;
wireless communication circuitry configured to provide wireless communication for the process control transmitter; and
intrinsic safety circuitry coupled to at least one of the first, second and third connections configured to limit energy transfer to a value which is less than an intrinsic safety value.
1 Assignment
0 Petitions
Accused Products
Abstract
An adapter for coupling to a process control transmitter of the type used to monitor a process variable in an industrial process includes a first connection configured to couple to a first side of a two wire process control loop, a second connection configured to couple to a second side of the two wire process control loop and in series with a first connection to a process control transmitter, and a third connection configured to couple to a second connection of the process control transmitter. Wireless communication circuitry is coupled to at least the third connection and is configured to provide wireless communication for the process control transmitter. Intrinsic safety circuitry coupled to at least one of the first, second and third connections is configured to limit transfer of electrical energy to a value which is less than an intrinsic safety value.
150 Citations
27 Claims
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1. An adapter for coupling to a process control transmitter of the type used to monitor a process variable in an industrial process, the adapter comprising:
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a first connection configured to couple to a first side of a two wire process control loop; a second connection configured to couple to a second side of the two wire process control loop and in series with a first connection to the process control transmitter; a third connection configured to couple to a second connection of the process control transmitter; wireless communication circuitry configured to provide wireless communication for the process control transmitter; and intrinsic safety circuitry coupled to at least one of the first, second and third connections configured to limit energy transfer to a value which is less than an intrinsic safety value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 25)
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20. A method of coupling a wireless adapter to a process control transmitter of the type used to monitor a process variable in an industrial process, the method comprising:
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coupling a first connection to a first side of a two wire process control loop; coupling a second connection to a second side of a two wire process control loop and in series with a first connection to the process control transmitter; coupling a third connection to a second connection of the process control transmitter; powering wireless communication circuitry with power received from the two wire process control loop; and limiting energy transfer to a value which is less than an intrinsic safety value. - View Dependent Claims (21, 22, 23, 24, 26, 27)
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Specification