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US 2009/0079612 A1Published application
Systems and/or Devices for Providing an Isolated Analog Output or Analog Input
AssigneeSiemens Energy & Automation, Inc.
InventorSteven Perry Parfitt
Life of this patent
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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;
- and
- transmit said recovered analog input signal to a programmable logic controller.
8 more elements
A system comprising:
- a voltage-to-frequency converter adapted to:
- receive an analog output signal adapted to control an actuator:
- 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;
- and
- transmit said analog output signal to said actuator.
7 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;
- and
- transmitting said recovered analog input signal to a programmable logic controller.
3 more elements
A method comprising:
- transmitting a recovered analog input signal to a programmable logic controller, a converted signal, on a downstream side of an isolation device, converted to said recovered analog input signal, said recovered analog input signal having a voltage value that varies according to a frequency value of said converted signal, said converted signal transmitted across said isolation device, an analog input signal converted to said converted signal having a constant voltage and a frequency value that varies according to a voltage value of said analog input signal, said analog input signal representative of a sensor-detected physical property.
Dependencies are inferred from the claim text.