RS-485 Half Duplex Serial Adapter The USB-8COMi-M allows you to add 8 USB to RS-422 or RS-485 serial ports by connecting to a host USB port. Constructed from… Many of these OEM device boards also have jumper settings or software that can change the mode between RS-232/RS-422/RS-485. DMXControl 3 http://wiki-en.dmxcontrol-projects.org/index.php?title=Getting_started_with_DMXControl_3

These USB to RS485 converters and USB to RS422 adapters are typically used for connecting an RS485 or RS422 device to a personal computer. Since RS485 or RS422 ports are absent from most computers, you can utilize either a USB to RS485 converter or USB to RS422 adapter to interface between your computer and device via the computer’s USB port. USB to RS485 is known for its multi-drop characteristics, which means it can be used for connecting multiple RS485 devices in a two-wire network. USB to RS422 is often used for extending a RS232 wire by using a USB to RS422 adapter at each end of a RS232 wire. An old Freestyler attempt (2018) https://www.codrey.com/electronic-circuits/usb-to-dmx-interface-adapter-converter-v1-0/ Note: The 120Ω resistor is only required if the module is the first or last device in a multi-drop RS-485 system, to meet RS-485 termination requirements. So, you may need to remove it in certain situations. Protection: 600W lightning-proof and surge-suppress, 15KV ESD protection (onboard 120R balancing resistor).

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The USB to RS485 converter and USB RS422 adapter, otherwise referred to as USB to RS485/ USB RS422 converters, are small electronic devices used for converting USB signals into either RS485 or RS422. Some of these converter/ adapter units are limited to converting USB to either RS485 or USB to RS422 but others have the ability to convert both RS485 and RS422 via a built-in auto-detection function or other manual configuration selection. All units convert bi-directionally which means they all convert data signals in both directions.

The USB to RS485 converter and USB RS422 adapter are made in a variety of models and designs. The standard USB RS485 converter / USB to RS422 adapter is a non-isolated adapter which is used for many businesses, offices and personal devices. The isolated USB to RS485 converter / USB to RS422 adapter is used in many industrial and business environments as they are built to be resistant to moderate voltage spikes. Note: DMX software tutorials are not included here due to paucity of space, thus you need to spend enough time learning more about them! Note: Try to keep the RS-485 bus as short as possible because long wires may add extra interference. You can use regular cat5e networking cable for the wiring but after twisting the A and B wires, it is not very crucial.

It’s straightforward to convert the RS-485 line to the unbalanced UART interface using a dedicated IC. The simplest solution (as the one discussed here) does have reasonable protection features but is not galvanically-isolated ⚠ Power supply problems: The power supply for the FT232 must be stable; an insufficient or unstable power supply may cause automatic disconnection. Make sure the power supply you use can provide enough current and the voltage is stable. Please replace the USB port, USB 3.0 port is recommended, or try a different computer. Quality Guarantee - SerialComm converters are low priced, high quality products and made to last a lifetime. They are manufactured in a ISO-9001 certified facility using surface mount technology with lead free components. All converters are pretested prior to shipment and are fully guaranteed for 5 years. There are no converters, Commercial or Industrial that surpass SerialComm's quality standards at any price tag. USB cable problem: Using a poor-quality USB cable or USB plug may cause distortion or interference with the electrical signal, which may lead to automatic disconnection. Use good quality USB cables or USB plugs whenever possible.