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Communication system with monitored input state of an input device and voltage increasing device

A technology of an input device and a communication system, applied in the field of communication systems, can solve the problems of expensive sensors and unreliable identification of input current, and achieve the effect of reducing transition resistance

Active Publication Date: 2012-09-26
PHOENIX CONTACT GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the contacts of the sensor connected to the digital input device will eventually have a transition resistance, so that the input current can be reduced to such an extent that the input current cannot be reliably recognized by the input device
This defect can be reduced though with high quality contacts, such as gold plated contacts; however, sensors with such contacts are expensive

Method used

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  • Communication system with monitored input state of an input device and voltage increasing device
  • Communication system with monitored input state of an input device and voltage increasing device
  • Communication system with monitored input state of an input device and voltage increasing device

Examples

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Embodiment Construction

[0024] figure 1 An embodiment of a communication system 10 including an input device 20 is shown in FIG. The input means may be formed as a digital input device. It can be understood that the input device 20 can be an input and output device, a control device or a component of a field device, and the input device can have both a digital input and a digital output. The communication system 10 can work in offline operation, or can be an integral part of an automated machine.

[0025] The input device 20 can be provided with a supply voltage terminal U V , the supply voltage terminal is denoted by reference numeral 30 . At the supply voltage terminal 30 at a supply voltage U V Above, the supply voltage is provided by a DC power supply 40, for example. The DC power source 40 can be, for example, an external DC power source which is connected to the input terminals 52 and 54 of the input device 20 . The DC power supply 40 provides, for example, a supply voltage of 25 volts. ...

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PUM

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Abstract

The present invention concerns a communication system with monitored input state of an input device. The input device has an input connection, a ground connection and an input circuit connected between the input connection and the ground connection. The input circuit is designed to detect an input signal. A sensor device is also provided, which is connected to the input connection and optionally the ground connection. The communication system also has a current-increasing device connected to the input connection and the ground connection, which is designed to furnish an increased current for the input circuit for an adjustable time period as a function of the voltage lying on the input connection. A power supply is also provided to supply power to the sensor device.

Description

technical field [0001] The present invention relates to a communication system with an input device whose input state is monitored; and a current amplifying device usable in the communication system. Background technique [0002] Even in automation technology, miniaturization based on circuit technology and device aspects is advancing more and more. As a result, measures must be taken to reduce losses in efficiency in devices and circuits. In digital input devices, the development of this aspect requires that the input current must be adjusted to smaller and smaller. In many application conditions, the input current is even lower than 5mA. Since the contacts of the sensor connected to the digital input device ultimately have transition resistances, the input current can be reduced to such an extent that the input current cannot be reliably detected by the input device. This defect can though be reduced by using high quality contacts, such as gold plated contacts; however ...

Claims

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Application Information

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IPC IPC(8): H03K19/0175H03F3/20
CPCH03K19/0175H04Q9/00H04Q2209/88H03F3/20
Inventor 维克托・奥斯特
Owner PHOENIX CONTACT GMBH & CO KG
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