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Network fieldbus power supply

A network and trunk cable technology, applied in the field of field bus power adapters, can solve unfavorable and inappropriate problems

Active Publication Date: 2016-04-13
EATON INTELLIGENT POWER LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In many instances, bus systems must operate according to specifications and set standards, which may prove to be disadvantageously restrictive and inappropriate to rely on the compliance of such discrete network devices in order to achieve overall bus system compliance
The architecture of such known systems can further prove to be disadvantageous in placing constraints on the location and physical size of the network and in particular the network bus system

Method used

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  • Network fieldbus power supply
  • Network fieldbus power supply
  • Network fieldbus power supply

Examples

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Embodiment Construction

[0037] Now turning to the shown figure 1 , the fieldbus system 10 is arranged to provide power and signaling from a first zone 12 comprising a non-hazardous environment to a second zone 14 comprising a hazardous environment and in an intrinsically safe manner.

[0038] The elements of the fieldbus system 10 as shown in the first zone 12 are of standard design and configuration, and in this example include a bulk power supply 16 arranged to receive mains power and passes the 24VDC signal to the fieldbus power supply unit 18, which is arranged to provide intrinsically safe isolation as required.

[0039] The fieldbus power supply unit 18 then transmits its output power signal by means of the fieldbus trunk 20 to network elements such as terminal devices located in the second danger zone 14 .

[0040] Also located in the first zone 12 in a standard manner is the distributed control system 22 which likewise receives mains power and which is intended to provide isolation prior to...

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Abstract

The invention provides for a network power-supply voltage adaptor arranged to receive an input voltage (V in) from a network trunk cable and to present an internal voltage derived from the said input voltage (V in), the adaptor being arranged, when at least one of the input voltage (V in) or the said internal voltage is above a reference voltage (Ref V), to regulate the received input voltage (V in) to provide an adaptor output dc power supply voltage (V out) at a substantially constant dc power supply level less than that of the input voltage (V in), and independent of changes in the input voltage level (V in), and the adaptor further comprising at least one communication feed-through loop (55, 56, 66, 68) for the passage of substantially unaltered communications signals through the adaptor.

Description

technical field [0001] The present invention relates to network power supply voltage adapters and related methods and network bus systems, and in particular but not exclusively to fieldbus power supply adapters and related systems and methods. Background technique [0002] Bus network systems are typically employed where various signals, including power, control and measurement signals, are to be communicated to and from various networked end devices. In many instances, the certainty that a network device can be provided with a signal of certain characteristics (and in particular its voltage level) can prove critical to the efficient / safe operation of the device and even the entire network system. This is especially the case in scenarios where the presence and operation of various network devices can likewise have an influence on the signals provided throughout the network and in particular by means of a common bus system. [0003] In many instances, bus systems must operat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B3/54H04B3/56H04L12/10H04L12/40
CPCH04B3/548H04B3/56H04B2203/547H04B2203/5483H04L12/10H04L12/40045Y02D30/50H02H3/202H02H5/04H02M3/04
Inventor D·G·威廉姆斯L·J·普赖斯
Owner EATON INTELLIGENT POWER LTD
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