The USB-i485 module is a cost-effective way to convert RS485 or RS422 industrial buses to a USB interface — easy wiring with breakout terminals, integrated end termination via jumper, and galvanic isolation to protect connected IT equipment. When connected to a PC USB port, USB-i485 is automatically detected and installs as a native COM port compatible with any existing serial communication application.
Multiple modules can be installed using USB hubs, allowing hassle-free configuration of a multi-serial system without any IRQ or DMA configuration. 1500Vdc galvanic isolation between the USB port and RS485/RS422 protects the PC from spikes or possible misconnections on the communication bus.
✅ 3 Year Manufacturer Warranty — backed by our UK-based technical support
Technical Details
Computer interface: USB V1.1 Plug and Play. Operational system virtual serial port driver
Supports Windows 10/7/Vista/XP/2008Server/2003Server/98/ME/2000/CE, MAC and Linux 2.4.20+. 64-bit options for latest operating systems
Field Interfaces: RS485 Half Duplex (dual buses), RS485 Full Duplex, or RS422 — jumper selected
Automatic flow control for RS485 Half Duplex. 120Ω internal resistor termination enabled by jumpers
Transmission rate: 300 bps to 250 kbps. Maximum RS485/RS422 cable length: 1200m
Maximum devices in the RS485 network: Half Duplex 2 x 32 devices; Full Duplex 32 devices
Data transmission and reception LED indicators. Power: from the USB port. Consumption: <100mA
Isolation: 1500Vdc between USB interface and RS485/RS422 interface. Bus protection: ±60Vdc, 15kV ESD
USB connection: Mini-B connector, 1.5m cable with Mini-B and A plugs supplied
RS485/422 connector: screw terminal, accepts 1.5mm² (16 AWG) wires. Enclosure: ABS, 70 x 60 x 18mm
Operating environment: 0 to 70°C, 10-90% RH non-condensing
Frequently Asked Questions
Do I need special drivers?
No — the module is automatically detected as a native COM port on connection, compatible with any existing serial communication software.
Can I run multiple RS485 networks from one PC?
Yes — multiple USB-i485 modules can be installed via USB hubs for hassle-free multi-serial configuration, with no IRQ or DMA conflicts.
Does it protect my PC from the field bus?
Yes — 1500Vdc galvanic isolation between the USB port and RS485/RS422 protects your PC from spikes or wiring faults on the bus.
Industry Applications
- Serial Network Commissioning — connects industrial RS485/RS422 networks to a PC or laptop for configuration and diagnostics.
- Multi-Bus Systems — supports multiple isolated serial connections via USB hubs.
- Field Service — compact, isolated interface for on-site troubleshooting of serial devices.