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Wiren Board 4:Аппаратная часть/en: различия между версиями
Wiren Board 4:Аппаратная часть/en (просмотреть исходный код)
Версия 15:46, 7 июня 2019
, 4 года назадНет описания правки
| (не показаны 4 промежуточные версии 2 участников) | |||
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== Input protection == | == Input protection == | ||
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== Multifunctional inputs/outputs Ax and Dx == | == Multifunctional inputs/outputs Ax and Dx == | ||
[[File:Ax.png|thumb|400px| Equivalent | [[File:Ax.png|thumb|400px| Equivalent circuit of A1-A3 channels]] | ||
[[File:А5.png|thumb|400px|Equivalent | [[File:А5.png|thumb|400px|Equivalent circuit of A4-A5 channels]] | ||
[[File:Dx.png|thumb|400px|Equivalent channels | [[File:Dx.png|thumb|400px|Equivalent circuit of Dx channels]] | ||
Multifunctional channels consist of input and output stages are connected in parallel, as well as protective diodes (connected to one terminal of the channel). | Multifunctional channels consist of input and output stages are connected in parallel, as well as protective diodes (connected to one terminal of the channel). | ||
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Such outputs are called “open collectors”. | Such outputs are called “open collectors”. | ||
Input stage of Ax channel consists of an analogue-to-digital converter ADCx and an input resistor Rx. | Input stage of Ax channel consists of an analogue-to-digital converter ADCx and an input resistor Rx. | ||
The ADC has a high impedance, so it doesn't affect the channel operation even if the channel works as output. | |||
In input mode the Tx switch is inactive (open) and, thus, does not affect voltage measuring at the channel terminals. Input resistance of the channel in input mode is determined by the Rx resistance. | |||
If the channel terminal is left floating, the input voltage measured by ADCs is pulled down to zero by the Rx resistance. | |||
А4 and А5 support binary input function DI: more than 3V at the terminal is considered as triggering of the input. | А4 and А5 support binary input function DI: more than 3V at the terminal is considered as triggering of the input. | ||
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=== Example of device connection === | === Example of device connection === | ||
Schematic test stand - [[Файл:Стенд-hi.jpg|thumb|500px|Schematic test stand]] | |||
== | == Schematics and Drawing == | ||
Wiren Board 4 principle diagram - [[Файл:WB 4.3.pdf|Файл:WB 4.3.pdf]], scheme - [[Файл:WB 4.2 чертеж.pdf|Файл:WB 4.2 чертеж.pdf]] | Wiren Board 4 principle diagram - [[Файл:WB 4.3.pdf|Файл:WB 4.3.pdf]], scheme - [[Файл:WB 4.2 чертеж.pdf|Файл:WB 4.2 чертеж.pdf]] | ||