![]() The product page at says that the B_S-1WR2 family is specifically designed for applications in the board power system that require a set of voltages that are isolated from the input supply. B0505S is 1WR2 DC-DC Power Supply Module 5V to 5V Isolation Chip DIP-4. UL recognition: 2500 V rms for 1 minute per UL 1577ī0505S is the DC/DC converter module used to convert USB 5V to isolated 5V for the other USB connector. High common-mode transient immunity: >25 kV/μsĮvaluation Board and User Guide available Low and full speed data rate: 1.5 Mbps and 12 Mbps ADuM3160 promises isolation voltage 2500V.Įnhanced system-level ESD performance per IEC 61000-4-x The chip uses high speed CMOS and monolithic air core transformer technology. The USB data signal isolation on this device is based on ADuM3160 component which is a USB port isolator based on Analog Devices, Inc., iCoupler technology. When looking at the circuit board, I found out that the main active components in it are: It does not support USB 2.0 Hi-Speed 480 MBps, which means that some fast USB device do not work with it. This device support only USB Low and full speed data rates 1.5 Mbps and 12 Mbps. That’s considerably less than typically available from computer USB port, and may not be enough for some power hungry hardware. You can expect to get 1W MAX (0.2A 5V) on isolated DC/DC side for USB power. There is a limitation how much power can go through this device. If low speed is needed, the DIP switch should be moved to “ON” position. The switch like it is in the pictures selects the isolator to operate at full speed data rate of 12 MBps. Automatic speed detection would have been nice, but I can live with this manual selection although getting it to work sometimes might need some manual testing which setting is the right. This device support USB Low and full speed data rate: 1.5 Mbps and 12 Mbps. From the discussion on the product page I read that the DIP switch is for USB bus speed selection. Other this is the lack of documentation of dip switch function. That was known when I bought this cheap board instead of somewhat more expensive similar device with plastic case. There are also some disadvantages and limitations on this product as well.įirst is that there is no case that comes with this so I had to make my own because I did not like having open USB hardware laying around potentially making short circuit. I tested the isolation with insulation resistance meter at 500V DC, and the device withstood that test nicely and meter showed open circuit. In my testing I have found that this product corresponds to the description. With those specifications this product looks pretty promising. Tested part does not support the USB wireless network card, see USB flash drive. Low speed devices: Keyboard, mouse, USBASP, USBHID equipment, USBCDC equipment. Full speed equipment: USB flash drive, digital camera, card reader, mobile hard disk, U aegis, USB hub, AVRJTAG, AVRISP, AVRISPMKII, S – Lab, JET51, J – Link, FET430UIF, PICKIT2, XDS100, LPC cc-link, ICD2, USB serial port (FT232, CP2102, PL2303, CH341 chips). Power supply: from the USB port to the PC hostĪvoid driving, it is more convenient to use Support USB control transfer, bulk transfer, interrupt transmission, synchronous transmission/etc Then I saw this promising looking Isolator USB to USB Optocoupler Isolation Module Coupled Protection Board ADUM3160 Isolation Voltage 2500V board for around 10 Euros.ġ2 Mbps support USB 1.5 Mbps at low speed and full speed does not support pure high-speed equipment I have thought of getting USB isolator for some time, but many of them seem to be quite expensive (many cost nearly 100 Euros). The USB isolators effect a potential decoupling of all USB connections and separate the ‘normal’ PC system from the critical application. It will also protect the USB device and host from electrical shocks or static electricity shocks. USB isolation works by creating a new ground for the USB device so that it doesn’t have to share ground with your computer (and other devices that you might have connected in your house). USB isolators are the professional tools to avoid and fight ground loops and equalizing currents and to protect against overvoltage. USB isolators are used in applications where direct USB connection can create noise (ground loop noise to audio or measurement), direct connection can be unreliable (noise to USB signal) or where isolation is needed to protect USB port or for electrical safety (for example laboratory measurement). The USB isolator is a device that will pass USB signal from input to output connector, while providing galvanic isolation between them.
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