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The inputs have two modes of operation: trigger mode (for control with buttons) and repeat mode (for control with switches). In the trigger mode, to change the state of the relay, it is enough to close and open the input once. The change of state occurs on the rising edge (when the circuit | The inputs have two modes of operation: trigger mode (for control with buttons) and repeat mode (for control with switches). In the trigger mode, to change the state of the relay, it is enough to close and open the input once. The change of state occurs on the rising edge (that is, when the circuit). In the repeat mode, the relay state is determined by the input state: the input is closed — the relay is on, open — off. Details about the mode switching written in [[ Modbus Management Of Relay Modules/en|Modbus Management Of Relay Modules]]. | ||
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| [[File:DIN 3U.png |400px|thumb|center| | | [[File:DIN 3U.png |400px|thumb|center|overall dimensions of the modules are 53,3 x 90,2 x 57,5 mm (l x W x h)]] | ||
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== | == Installation of modules == | ||
[[File:MRWL3-front_view.png|300px| thumb|left| | [[File:MRWL3-front_view.png|300px| thumb|left| Relay module pinout]] | ||
The relay module is mounted on a standard 35 mm wide DIN rail and occupies a width of 3 DIN modules. | |||
All connections are realized by blocks of screw clips. The wire section for contacts K1 — K3 must correspond to the switched load. | |||
When connecting the switching devices to the relay contacts K1 — K3, it is important not to exceed the recommended current — 20 A. | |||
The flowing current is small when the button or switch is closed, so the button or switch can be any type. Despite the built-in protection against rattle, choose quality buttons and switches to avoid false alarms due to bad contacts. | |||
If the device is the last one on the RS-485 line, a 120 Ohm resistor-terminator must be installed between its inputs A and B. Practice shows that in the case of bench tests with a small length of the RS-485 line and a small number of terminator devices on the last device in the line can be installed without terminator. | |||
The module must be installed in such a way as to meet the requirements of electrical safety and to prevent accidental contact of contacts under high voltage. The module must be operated under recommended environmental conditions. | |||
<!--[[File:Installation_WB3_+_WB5_+_DIN.png|850px|thumb|center|Образец монтажа и подключения модуля WB-MR3HV/I. Выбор качественного блока питания очень важен для работы модуля. Кнопка с проводами желтого цвета, подключенная ко входу "4" модуля, отключает все три канала одновременно.]]--> | <!--[[File:Installation_WB3_+_WB5_+_DIN.png|850px|thumb|center|Образец монтажа и подключения модуля WB-MR3HV/I. Выбор качественного блока питания очень важен для работы модуля. Кнопка с проводами желтого цвета, подключенная ко входу "4" модуля, отключает все три канала одновременно.]]--> | ||
== | == Relay operation in case of power failure == | ||
Depending on the value written to the storage register 0x06, after the power is turned off and restored, the relays will remain off (if the value is 0, or turn on those that were turned on before the power interruption if the register has a value of 1). | |||
== | ==Modbus Control== | ||
Details of the work with the module via Modbus Protocol is written in [[Relay Module Modbus Management/en| Relay Modules Modbus Management ]]. | |||
There you can also find a map of the device registers. | |||
[[Периферийные устройства с интерфейсом RS-485 серии WB-xxxx | | [[Периферийные устройства с интерфейсом RS-485 серии WB-xxxx/en |Back to peripheral devices list]] | ||
== | == Device firmware update == | ||
Starting with the new firmware versions of the device, the firmware update functionality (firmware) via the Modbus Protocol is supported. This makes it possible to extend the functionality of the devices and eliminate errors in the firmware directly at the installation site. Read more about flashing devices described in the article [[WB-MCU-Flasher|Download firmware to Wiren Board devices]]. A list of firmware versions that support the update, as well as devices for which this feature is implemented, can be found in [[Firmware_Changelog/en| Firmware Changelog]]. | |||
== | == Known faults and bugs == | ||
[[WB-MR:_Errata | | [[WB-MR:_Errata/en |List of known faults]] | ||
== | == Images and drawings of the device == | ||
{{Wbincludes:WBPictures|1}} | {{Wbincludes:WBPictures|1}} |