Просмотр кода страницы WB-MAI2-mini/CC 4-20mA Modbus Analog Inputs/en

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[[File:WB-MAI2-pic.png|mini|Analog input module WB-MAI2-mini/CC]]
'''[https://wirenboard.com/en/product/WB-MAI2-mini-CC/ Buy online]'''

{{#vardefine:ProductName1|WB-MAI2-mini-CC}} {{#vardefine:ProductFullName1|Analog input module WB-MAI2-mini/CC}}{{#vardefine:FileName1|WB-MAI2-mini_СС}}

== Purpose == 
WB-MAI2-mini/CC is a compact analog input module designed to measure current signal 4..20 mA via two independent channels. The module is controlled from the controller or PC via RS-485 bus by Modbus commands.

== Specifications ==
{| class="wikitable"
|+Table 1. Technical parameters.
!Parameter
!Value
|-
! colspan="2" |Power
|-
|Supply voltage
|9 V – 28 V
|-
! colspan="2" |measurement Channels
|-
|Number of channels
| 2
|-
|Current measurement
|0 – 20 mA
|-
|Input impedance
|A 49.9 Ohm
|-
|Current measurement error
|±1%
|-
! colspan="2" |Control
|-
|Management interface
|RS-485
|-
|Interface isolation
|no
|-
|Communication protocol
|Modbus RTU, the address is set by software, factory settings are indicated on the label
|-
|RS-485 interface parameters
|Default speed of 9600 bps; data bits 8; parity N; stop bits 2.
Interface parameters can be configured programmatically:
* Speed: 1200, 2400, 4800, 9600 (default), 19200, 38400, 57600, 115200 bit/s <br>([[UART_Communication_Settings|configure RS-485 communication parameters for wiren Board modbus devices]])
* Data: 8 bit
* Parity check: none (default), 1 - odd (odd), 2 - even (even)
* Stop bits: 1, 2 (default)
|-
|Ready for operation after power supply
|1 c
|-
! colspan="2" |dimensions
|-
|Size
|57 x 18 x 14 mm
|-
! colspan="2" |operating Conditions
|-
|Air temperature
|-40°C to +80°C
|-
|Relative humidity
|up to 98%, without condensation
|}

== Connection diagrams ==
The module is made in a compact housing and is designed for installation in solder boxes and cable channels. 
[[File:WB-MAI2-connections.png|без|мини|Сurrent measurement]]
The figure shows the connection diagram of sensors with a current output of 0-20 mA (4-20 mA). The internal resistance of the inputs — 49.9 Ohms.

== Presentation in the web interface ==
[[Файл:WB-MAI2-web.png|без|мини|]]

The web interface for the module displays current values (controls "Current input 1 (mA)" and "Current input 2 (mA)"), supply voltage and serial number. The "CC" in the device name indicates that it supports two current inputs ('''C'''urrent).

== Description of Modbus registers ==
All Modbus registers of the device are divided into 2 groups:
* General registers that define device parameters
* Registers of measured values

=== General registers ===
{| border="1" class="wikitable" style="text-align:center"
!Register/ address
!type
!read-write
!default
!format
!purpose
|-


| 104-105 || input || R|| || 32-bit unsigned int || uptime counter in seconds 
|-

| 110 || holding || RW|| 96 || baud rate / 100 || RS-485 port speed, '''divided by 100'''. Permissible speeds: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 <br>([[UART_Communication_Settings/en|configure RS-485 communication parameters for Wiren Board Modbus devices]])

|-
| 111 || holding || RW|| 0 || || configure the RS-485 port parity bit. Valid values: 0 - no parity bit (none), 1 - odd (odd), 2 - even (even) 
|-
| 112 || holding || RW|| 2 || || number of stop bits of RS-485 port. Valid values: 1, 2 
|-
| 120 (0x78) || holding || RW|| 0 || 0 || write to the register causes a stateless 
 reboot of the module 
|-
| 121 (0x79) || input || R || - || mV || current supply voltage of the module
|-
| 128 (0x80) || holding || RW || written on the label on the case || || Modbus address of the device 
|-
| 200-206 || input || R || {'M','A','I','2','C','C'} | | | device signature 
|-
| 220-241 || input || R | | | | _date__ _time__|| firmware build date
|-
| 250-269 || input || R | | | / string, null-terminated || firmware version
|-
| 270-271 || input || R|| || 32-bit unsigned int || unique identifier (S/N)
|-
|}

=== Registers containing the values of the measured values ===

{| border="1" class="wikitable" style="text-align:center; width:1000px;"
!Register / address (hex)
!Type
!Digit capacity
!Byte order
!Format
!Multiplier
!Parameter
!Purpose 
!Unit
|-
| 246 || input || s16 || big endian || (value) || 3.125 e-02 || Current input 1 (mA) | | / channel Current 1 || mA
|-
| 247 || input || s16 || big endian || (value) || 3.125 e-02 || Current input 2 (mA) | | / channel Current 2 || mA
|-
|}

== Images and drawings of the device ==
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