www.advantech.com/products Online Download Selection Guide USB to Serial, USB Hubs and Isolators Model Name USOPTL4, USPTL4 485USB9F-2W 485USBTB-2W UHR204, UHR304 UH104 UH401 Description USB to RS- 422/485 Converter Mini USB to RS-485 2-wire Converter Mini USB to RS-485 2-wire Converter Industrial DIN Rail Mount USB 4 Port Hub Panel Mount USB 4 Port Hub USB to USB Isolator Function USB to Serial Converter USB Hub USB Isolator USB Ports High Retention USB Connectors  -     Number of USB Upstream Ports 1 1 1 1 1 1 Number of USB Downstream ports - - - 4 4 1 Isolation - - - 4kV (UHR304) - 4kV Serial Ports Number of Serial Ports 1 1 1 - - - Serial Interface RS-422/485 RS-485 RS-485 - - - Serial Connector Terminal Block DB9 Female Terminal Block - - - Isolation 2kV (USOPTL4 only) - - - - - Specifications Temperature 0 to 70°C 0 to 70°C 0 to 70°C -40 to 80°C -40 to 80°C -40 to 80°C Power Input USB Bus USB Bus USB Bus 10 to 30VDC (USB Bus, UHR204 only) USB Bus USB Bus DIN Mount - - -  - - Panel Mount - - -   - Inline    - -  UL - - -  - - Class 1 Division 2 - - -  - - Page 19-25 19-27 19-26 19-28 19-29 19-30 Power & Energy Automation 8 5 4 4 10 Panel PCs 9 iDoor Technology Modules 8 Industrial monitors 7 Industrial IoT Gateways 6 Control Cabinet PCs High-Performance Control Panels Industrial Operator Panels 3 2 IntelligentMotionControl andMachineVision 1 11 Control IPCs 12 Remote DA&C Systems 13 Wireless IoT Sensing Devices 14 15 RS-485 I/O Modules 16 Thin-Client Terminals Industrial Ethernet Solutions 17 IP Gateway and Serial Device Servers iNetworking 18 19 WebAccess+ Solution Ethernet I/O Modules Chapter 19 Table of Contents Table of Contents