0403:1235 — Iron Logic Z-397 RS-485/422 converter

This is the USB identifier for a Iron Logic Z-397 RS-485/422 converter manufactured by Future Technology Devices International, Ltd. The vendor ID 0403 is registered to Future Technology Devices International, Ltd with the USB Implementers Forum, and 1235 is the product ID that Future Technology Devices International, Ltd assigned to this particular model. When you run lsusb on Linux, this device appears as 0403:1235 Future Technology Devices International, Ltd Iron Logic Z-397 RS-485/422 converter.

Linux

$ lsusb
Bus 001 Device 004: ID 0403:1235 Future Technology Devices International, Ltd Iron Logic Z-397 RS-485/422 converter

You can filter directly with lsusb -d 0403:1235, or get the full descriptor dump with lsusb -v -d 0403:1235. Kernel messages from dmesg show the same pair as idVendor=0403, idProduct=1235.

Windows

In Device Manager, open the device, go to Details → Hardware Ids. This device reports:

USB\VID_0403&PID_1235
USB\VID_0403&PID_1235&REV_0100

From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_0403&PID_1235"

macOS

$ system_profiler SPUSBDataType
    Iron Logic Z-397 RS-485/422 converter:
      Product ID: 0x1235
      Vendor ID: 0x0403  (Future Technology Devices International, Ltd)

Having driver issues with this device? Most USB devices are handled by a generic class driver; if yours shows up as an unknown device, confirm the ID above first, then check the manufacturer's downloads page. Future Technology Devices International, Ltd official support →

The exact lines this page is generated from, in the upstream source file:

0403  Future Technology Devices International, Ltd
	1235  Iron Logic Z-397 RS-485/422 converter

• 0403:0000 H4SMK 7 Port Hub / Bricked Counterfeit FT232 Serial (UART) IC
• 0403:0232 Serial Converter
• 0403:1060 JTAG adapter
• 0403:1234 IronLogic RFID Adapter [Z-2 USB]
• 0403:6001 FT232 Serial (UART) IC
• 0403:6002 Lumel PD12
• 0403:6007 Serial Converter
• 0403:6008 Serial Converter

See all 179 devices from Future Technology Devices International, Ltd →