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US 7,786,919 B2Granted
Systems and/or devices for providing an isolated analog output or analog input
AssigneeSiemens Industry, Inc.
InventorSteven Perry Parfitt
Life of this patent
Estimating the term…
Abstract
Certain exemplary embodiments can provide a method, which can comprise transmitting a recovered analog input signal to a programmable logic controller. The recovered analog input signal can be converted, on a downstream side of an isolation device, from a converted signal. The recovered analog input signal can have a voltage value that varies according to a frequency value of the converted signal.
Claims16
A system comprising:
- a voltage-to-frequency converter adapted to:
- receive an analog input signal that represents a sensor-detected physical property;
- convert said analog input signal to a converted signal having a constant voltage and a frequency value that varies according to a voltage value of said analog input signal;
- and
- transmit said converted signal across an isolation device;
- and
- a frequency-to-voltage converter adapted to:
- receive said converted signal;
- convert said converted signal to a recovered analog input signal having a voltage value that varies according to said frequency value of said converted signal;
- transmit said recovered analog input signal to a programmable logic controller;
- a second voltage-to-frequency converter adapted to:
- receive an analog output signal adapted to control an actuator from the programmable logic controller;
- convert said analog output signal to a converted signal having a constant voltage and a frequency value that varies according to a voltage value of said analog output signal;
- transmit said converted signal across an isolation device;
- and
- a second frequency-to-voltage converter adapted to:
- receive a converted signal;
- convert said converted signal to a recovered analog output Signal having a voltage value that varies according to said frequency value of said converted output signal;
- and
- transmit said analog output signal to said actuator;
- and
- an information device communicatively coupled to the programmable logic controller via a network, the information device including a user program adapted to
- monitor one or more activities of the programmable logic controller, or
- create, edit, compile or transmit a control program.
21 more elements
A system comprising:
- a voltage-to-frequency converter adapted to:
- receive an analog output signal adapted to control an actuator from a programmable logic controller;
- convert said analog output signal to a converted signal having a constant voltage and a frequency value that varies according to a voltage value of said analog output signal;
- transmit said converted signal across an isolation device;
- and
- a frequency-to-voltage converter adapted to:
- receive said converted signal;
- convert said converted signal to a recovered analog output signal having a voltage value that varies according to said frequency value of said converted signal;
- transmit said analog output signal to said actuator;
- and
- an information device communicatively coupled to the programmable logic controller via a network, the information device including a user program adapted to
- monitor one or more activities of the programmable logic controller, or
- create, edit, compile or transmit a control program.
10 more elements
A method comprising:
- receiving an analog input signal that represents a sensor-detected physical property;
- converting said analog input signal to a converted signal having a constant voltage and a frequency value that varies according to a voltage value of said analog input signal;
- transmitting said converted signal across an isolation device;
- on a downstream side of said isolation device, converting said converted signal to a recovered analog input signal having a voltage value that varies according to said frequency value of said converted signal;
- transmitting said recovered analog input signal to a programmable logic controller;
- in a voltage-to-frequency converter:
- receiving an analog output signal adapted to control an actuator from the programmable logic controller;
- converting said analog output signal to a converted signal having a constant voltage and a frequency value that varies according to a voltage value of said analog output signal;
- transmitting said converted signal across an isolation device;
- in a frequency-to-voltage converter:
- receiving said converted signal;
- converting said converted signal to a recovered analog output signal having a voltage value that varies according to said frequency value of said converted signal;
- and
- transmitting said analog output signal to said actuator;
- and
- communicatively coupling an information device to the programmable logic controller via a network, the information device including a user program;
- and
- monitoring with the user program one or more activities of the programmable logic controller, or
- using the user program to create, edit, compile or transmit a control program.
16 more elements
Dependencies are inferred from the claim text.