发明名称 |
Analog current / digital bus protocol converter circuit |
摘要 |
Protocol converter device converts between a 4-20 mA analog signal format and a digital Fieldbus signal format. An input circuit is provided, coupled to the transmitters which includes a multiplexer for selecting one of the analog signals from the transmitters of, e.g., three different field devices or from the analog signal converted from a digital signal. After the analog signal is converted to a digital signal, a central processing unit converts the converted digital signal into a digital quantity of a property of interest which may be display and/or transmitted to other devices or a control computer via a Fieldbus. The central processing unit selects which transmitter converted analog signal is to be displayed. The converter circuit can be placed in an environmental hazard resistant housing, to create a protocol conversion unit that can be located in a convenient field or control center location.
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申请公布号 |
US5706007(A) |
申请公布日期 |
1998.01.06 |
申请号 |
US19950542594 |
申请日期 |
1995.01.03 |
申请人 |
SMAR RESEARCH CORPORATION |
发明人 |
FRAGNITO, CARLOS ROBERTO;GUASTI, JR., JOSE GUILHERME;DE SOUZA, LIBANIO CARLOS;GINATTO, LUIZ ANTONIO;GRATON, MARCO ANTONIO |
分类号 |
G08C19/02;(IPC1-7):H03M1/00 |
主分类号 |
G08C19/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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