WBIO-AI-DV-12/4-20mA Analog Inputs/en: различия между версиями
(Новая страница: «Previously, when connecting the module via WB-MIO or WB-MIO-E, there was no possibility to select the input mode from the web interface. We recommended creating c…») |
(Новая страница: «For each channel, you can specify a conversion factor (scale) corresponding to the measurement mode. Restartujte service wb-mqtt-serial after changes: <code>> ser…») |
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Previously, when connecting the module via WB-MIO or WB-MIO-E, there was no possibility to select the input mode from the web interface. We recommended creating copies of the config-wbio-ai-dv-12-single template.json stored on the controller in the <code>/usr/share/wb-mqtt-serial/templates/config-wbio-ai-dv-12-single directory.json </code>, and make changes to the copy (the file must have a different name). It was necessary to change the device type in the template, for example, to <code>"device_type": "WBIO-AI-DV-12-Single-50v",</code>. After that, you had to restart the wb-mqtt-confed service and refresh the web page to make the new device type available in the configuration. | Previously, when connecting the module via WB-MIO or WB-MIO-E, there was no possibility to select the input mode from the web interface. We recommended creating copies of the config-wbio-ai-dv-12-single template.json stored on the controller in the <code>/usr/share/wb-mqtt-serial/templates/config-wbio-ai-dv-12-single directory.json </code>, and make changes to the copy (the file must have a different name). It was necessary to change the device type in the template, for example, to <code>"device_type": "WBIO-AI-DV-12-Single-50v",</code>. After that, you had to restart the wb-mqtt-confed service and refresh the web page to make the new device type available in the configuration. | ||
For each channel, you can specify a conversion factor (scale) corresponding to the measurement mode. Restartujte service wb-mqtt-serial after changes: | |||
<code>> service wb-mqtt-serial restart<br>> service wb-mqtt-confed restart</code> | <code>> service wb-mqtt-serial restart<br>> service wb-mqtt-confed restart</code> | ||
The most correct way is to set the measurement scale parameter in the channel setup in the device configuration. Let's say we want to measure the voltage in the ±50 V range at the first differential input. | |||
To do this, perform the following settings. In the device properties, add a channel list (List if channels) by clicking on the '''Properties''' button, and then add a channel by clicking on the '''+Item''' button. | |||
In the channel settings, we leave only the field for specifying the conversion factor (Scale (value multiplier)), the other options are disabled: | |||
Specify the channel name (as in the interface) and conversion factor. | |||
Save changes with the '''Save''' button at the top of the screen. | |||
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Версия 10:02, 16 июля 2019
<languages> Внимание: Отображаемое название «WBIO-AI-DV-12 4-20мА analog inputs module» переопределяет ранее заданное отображаемое название «WBIO-AI-DV-12 4-20MA».
The module is designed for industrial and home automation systems and is used to measure current signals in the range up to 20 mA. A typical application of the module can be considered to receive data from devices that transmit information on the interface "current loop".
IMPORTANT: unlike other WBIO modules, only one instance can be connected to a single controller or interface module.
Buy WBIO-AI-DV-12_4-20MA in the online store
Design
The module contains 12 current inputs A1 — A12 for the connection of current outputs (0) 4 — 20 mA ("current loop").
For easy connection, each pair of inputs is output to one of 6 terminals. In addition to the inputs, each terminal block has +5 V and iGND lines, but the maximum current flowing through the +5 V line should not exceed 0.5 A. Thus, each terminal block has +5 V, 2 current inputs and iGND.
The module is galvanically isolated from the controller circuits, including the iGND line.
Technical specifications
| Parameter | Value |
|---|---|
| General | |
| Number of inputs | 12 |
| Input type | analog, current measurement |
| Galvanic isolation | group, from controller circuits, 1 kV |
| Measured current | 0 — 20 mA |
| Input impedance | 50 Ohms |
| Measurement error | 0.1% + 0.003 mA |
| Other | |
| Module type | "I" (inverted address scheme) |
| Maximum power consumption | 0.25 W |
| Width, DIN units | 3 |
| Overall dimensions (l x W x h) | 53.30 x 90.2 x 57.50 mm |
| Terminals and wire section | |
|---|---|
| The recommended wire cross section with pin bushing insulated tip, mm2 | 0,75 — 1 |
| Standard sleeve length of pin bushing insulated tip, mm | 8 |
| Tightening torque of screws, Н∙м | 0,2 |
Current measurement
Connection to the controller
Unlike other WBIO modules, only one instance can be connected to a single controller or interface module.
To connect, you need to dock the WBIO-AI-DV-12 4-20 mА module to the right of the Wiren Board controller and make sure that all the connector pins on the module get into the corresponding connector holes on the controller. Next, you should go to the web interface of the controller (read more about the web interface in relevant section), go to the tab 'Configs' and select/etc/wb-hardware.conf. Next, in the drop-down list, select the module name WBIO-AI-DV-12 Analog Inputs.
Now you need to activate the desired mode in the tab Channels. Channels are denoted as Channel Ax, where 'x' corresponds to the entry number. Select from the list the setting Current 0-20mA
After the necessary settings and saving changes, the device will be displayed in the Devicestab.
For more information, see Activating the modules in the web interface of the controller. Unlike other modules, WBIO-AI-DV-12 can be connected with the ninth module in the line of side modules. However, it must occupy the first, fifth or ninth position in the line.
Изображения и чертежи устройства
По ссылкам ниже вы можете скачать изображения и чертежи устройства WBIO-AI-DV-12_4-20.
Corel Draw 2018: WBIO-AI-DV-12_4-20.cdr.zip
Corel Draw PDF: WBIO-AI-DV-12_4-20.cdr.pdf
Autocad 2013 DXF: Мы еще не подготовили чертеж этого устройства. Вы можете запросить чертеж устройства "Analog inputs module WBIO-AI-DV-12 for measuring analog signals 4-20 мА" на портале техподдержки Wiren Board (необходима регистрация).
Известные ошибки и особенности
ERRAIDV01: Сниженная точность входов
Подверженные устройства
WBIO-AI-DV-12/4-20MA отгруженные до 20 мая 2019г.
Описание
Ошибка измерения тока в WBIO-AI-DV-12/4-20MA может составлять до 1%.
Причины и подробное описание
Номинал входного защитного резистора выбран слишком большим относительно внутренного сопротивления АЦП.
Пути обхода
нет
Запланированное исправление
Начиная с 20 мая 2019г. в WBIO-AI-DV-12/4-20MA устанавливаются компоненты, обеспечивающие ошибку не более 0.1%+0.003мА.