Features

• Adds one RS-422 or RS-485 serial port by connecting to a USB port
• One 5-pin terminal block connector for easy wiring
• No need to open chassis to set operation modes-upper case can be sliding open for easy RS-422, RS-485 mode settings
• Installed as standard Windows COM port
• RS-422 data signals: TxD-, TxD+, RxD+, RxD-, GND, RTS-, RTS+, CTS+, CTS-
• RS-485 4-wire data signals: TxD-, TxD+, RxD+, RxD-
• RS-485 2-wire data signals: Data-, Data+
• Automatic transmit and receive control for 2-wire RS-485 half-duplex mode
• Built-in termination and biasing
• High speed serial port with baud rate up to 921.6K bps
• Non-standard baudrates supported
• LEDs of Power, TxD and RxD for easy port monitoring and diagnostic
• Serial port protected with surge protection of 10KV
• Powered by USB port, no external power adapter required
• Easy plug and play installation and RS-422/485 device connection
• COM port number assigned can be changed to any COM port number required
• Works with USB 1.1, 2.0 & 3.0 host port
• Virtual COM port drivers provided for Windows 10, 8, 7, Vista, XP, ME, 98, Server 2012, Server 2008, Server 2003, CE.NET (version 4.2 and greater), or RT in 32-bit or 64-bit installations. Also supports Linux, MAC OS X, MAC OS 9, MAC OS 8, Android.

USB Bus
Compliance	USB 1.0/1.1 compliant, USB 2.0 compatible
Speed	12 Mbps, full-speed USB
FIFO	128 byte transmit FIFO 384 receive FIFO
Serial Interface
Port Type	RS-422/RS-485
Number of Ports	1
Connectors	5-pin terminal block
Serial Line Protection
ESD Protection	10KV
Serial Port Speed
Baudrate	300 bps to 921.6k bps
Serial Communication Parameters
Data Bits	5, 6, 7, 8
Stop Bits	1, 1.5, 2
Parity	None, Even, Odd, Space, Mark
Flow Control	RTS/CTS, XON/XOFF
Serial Signals
RS-422	TxD-(A), TxD+(B), RxD+(B), RxD-(A), GND
RS-485-4 wire	TxD-(A), TxD+(B), RxD+(B), RxD-(A), GND
RS-485-2 wire	Data-(A), Data+(B), GND
Driver Support
OS	Windows 7, Vista, 2003, XP (WHQL certified) and 2000 Linux Kernel 2.4 and up built-in support
Power Supply
Input	Bus-powered No external power adapter required
Mechanical
Chassis	Plastic, ABS
Environmental
Operating Temperature	0 to 55 °C (32 to 131 °F)
Operating Humidity	5 to 95% RH
Storage Temperature	-20 to 75 °C (-4 to 167 °F)
Safety Approvals	EN55022 Class B, EN55024, EN61000-3-2, EN61000-3 IEC 61000-4-2, IEC 61000-4-3, IEC 61000-4-4, IEC 61000-4-5, IEC 61000-4-6, IEC 61000-4-8, IEC 61000-4-11. CISPR PUB. 22 and FCC Part 15 Class B.

Pinout information:

RS-422 Terminal Block

RS-422 Signal Pin-outs of Terminal Block

Pin Signal 1 TxD- (A) 2 TxD+(B) 3 RxD+(B) 4 RxD-(A) 5 GND

RS-485 Terminal Block

RS-485 4 Wire (Full duplex) Signal Pin-outs of Terminal Block

Pin Signal 1 TxD- (A) 2 TxD+(B) 3 RxD+(B) 4 RxD-(A) 5 GND

RS-485 2 Wire (Half duplex) Signal Pin-outs of Terminal Block

Pin Signal 1 Data- (A) 2 Data+(B) 5 GND

RS-422 Signal Wiring

Point-to-Point 4 Wire Full Duplex

USB-COMi-TB                                RS-422 Device

RS-485 Signal Wiring

Point-to-Point 4 Wire Full Duplex

USB-COMi-TB                                RS-485 Device

Multidrop RS-485 2-Wire Half-duplex

USB-COMi-TB                                RS-485 Device