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Measurement transducer feed device

A technology for measuring transducers and power feeding devices, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problem of small available power and achieve the effect of flexible use

Active Publication Date: 2018-12-21
SICK ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the small applied current (e.g. 4 to 20mA), very little power is available

Method used

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  • Measurement transducer feed device

Examples

Experimental program
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Effect test

Embodiment Construction

[0043] figure 1 A system 10 for detecting measured values ​​is shown. System 10 includes a programmable logic controller (PLC) 12, a measurement transducer feed 14 and a measurement transducer 16, such as a temperature sensor.

[0044] PLC 12 includes a voltage source and a HART master (neither shown). The PLC 12 is electrically connected to the measuring transducer feeder 14 at two connection contacts 18 . The measuring transducer 16 is in turn electrically connected to the measuring transducer supply 14 at two supply contacts 20 .

[0045] A current loop 22 is provided between the connection contacts 18 in the measuring transducer supply 14 . A current loop 22 is closed within the PLC 12 .

[0046] The current loop 22 includes a power connection 24 comprising an NPN transistor 25 in the transmitter circuit. The power connection 24 supplies a corresponding constant voltage to the measuring transducer 16 and to a current regulation module 26 connected downstream of the po...

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PUM

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Abstract

The invention relates to a measurement transducer feed device for a process automation technology that is configured for the energy supply of a measurement transducer and for forwarding measurement signals of the measurement transducer to a control unit, wherein the measurement transducer feed device has at least two connecting contacts that are configured for coupling the measurement transducer feed device to the control unit, with a current loop being formed between the two connecting contacts, and with the current loop comprising a power tap that is configured to supply the measurement transducer with electrical energy. The measurement transducer feed device is characterized in that the current loop comprises a current regulation module that is connected or connectable in series to thepower tap and to the measurement transducer.

Description

technical field [0001] The invention relates to a measuring transducer feeder for process automation technology, configured for the energy supply of the measuring transducer and for forwarding the measuring signal of the measuring transducer to a control unit. The measuring transducer supply has at least two connection contacts configured for coupling the measurement transducer supply to the control unit, wherein a current loop is formed between the two connection contacts, the current loop comprising a power connection ( power tap), the power connector is configured to supply power to the measurement transducer. Background technique [0002] The measurement transducer feed is used to supply electrical energy to a measurement transducer such as a temperature sensor or a humidity sensor. At the same time, the measuring transducer supply is used to transmit the measuring data or measuring signals of the measuring transducer to the control unit. In particular, the measurement...

Claims

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Application Information

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IPC IPC(8): G01R31/00
CPCG01R31/00G08C19/02G01L5/00G01D5/00
Inventor 戴维·瓦尔德
Owner SICK ENG