This section provides an overview for lan modules as well as their applications and principles. Also, please take a look at the list of 22 lan module manufacturers and their company rankings. Here are the top-ranked lan module companies as of December, 2023: 1.Schmersal GmbH & Co. KG.
A LAN module is a small module board that can perform TCP/IP communication processing, which is essential for network communication, entirely within the module.
A LAN module can be divided into two types: those that are connected to a wired LAN and those that support wireless LAN (wireless LAN module).
Wireless LAN module is equipped with a wireless communication module in addition to TCP/IP communication functions to support wireless communication. Encrypted communications such as WEP, TKIP, and AES are also supported.
The LAN module frees the main CPU from such processing, allowing it to concentrate on other tasks.
LAN Modules are used in a variety of devices including PCs and smartphones. The following are typical uses other than PCs and smartphones:
Various sensors, such as temperature, humidity, and illumination sensors, are equipped with LAN Modules and the data collected by the sensors is sent to the server via LAN. This allows access to sensor data from remote locations.
Smart speakers, smart TVs, and other smart appliances are connected to the Internet via LAN Modules. LAN connectivity allows these devices to be remotely controlled from smartphones and other devices, as well as to access online services.
LAN Modules are also installed in industrial equipment such as factory production facilities and agricultural machinery, where the operating data and operation logs collected over a LAN are analyzed to monitor equipment status and perform maintenance management.
LAN Modules have an extremely wide range of applications and are used in almost all devices that need to be networked, and play an important role as a fundamental technology for connecting IoT devices to the Internet.
The LAN Module has the following operating principles to enable communication between devices:
When the source device transmits data, the data is divided into frames at the data link layer, converted into electrical and wireless signals at the physical layer, and transmitted.
At the receiving device, the physical layer converts electrical and radio signals into bits, and the data link layer reconstructs the frame and restores the data.
The data link layer verifies the correctness of data using error-checking information (e.g., CRC) contained in the frame and requests retransmission if there is an error.
At the data link layer, the transmitter and receiver devices synchronize and adjust the speed at which data is transmitted and received. This prevents data loss and collisions.
There are two types of LAN modules: wired and wireless. Each type is used for different purposes. However, when using a wired LAN modules, it is necessary to pay attention to the category of the LAN modules.
The LAN category is a standard for LAN cables and LAN modules. The higher the number, the faster the transmission speed. Currently, the most commonly used categories are CAT6 and CAT5e, which are called Gigabit Ethernet. In recent times, 10Gbps CAT7, called 10GBASE-T, is also being used. The latest category is called CAT8, which supports 40 Gbps.
When choosing LAN modules, it is necessary to select a product according to the category that suits the environment in which it will be used. If you choose a product that supports only a lower category than your environment, you will not be able to take full advantage of its performance. For example, if LAN modules that supports only CAT6 is selected for a CAT7 environment, only 1 Gbps communication can be achieved at the maximum.
In recent years, IoT, in which all devices and components are connected to the Internet, has been attracting attention. As a result, many LAN modules for the IoT are now on the market.
LAN modules for the IoT are characterized by their small size and low power consumption. LAN modules for the IoT are about 20 mm × 15 mm in size. In some cases, the LAN modules may be installed in a battery-operated environment with no power supply, so power efficiency is also important.
One of the features of LAN modules for the IoT is that some products can become access points themselves. This makes it possible to acquire and refer to information on devices directly from inspection tablets and other devices.
*Including some distributors, etc.
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