B+B SmartWorx_BB-QSU2-400
High-speed USB 2.0, RS-232/422/485 Adapter (USB cable included)，Expands one USB port to 4 USB ports (USB 2.0, 1.1 compatible)，Data rate: up to 921.6 kbps，Desktop-style enclosure, plug-and-play compatibility
BB-QSU2-400
Not Recommended For New Installations. Replacement recommendation is Model BB-USR604.
Expands one USB port to 4 USB ports (USB 2.0, 1.1 compatible)
Data rate: up to 921.6 kbps
Desktop-style enclosure, plug-and-play compatibility
Bus powering – no external power required
High-speed UARTS with 1KB FIFOs boost data rates
Enumerates as standard COM port
Full modem, hardware and software flow control
Software selectable RS-232/422/485
USB cable included, 0.9 m (3 ft)
不建议用于新安装。替代建议为BB-USR604型。
将一个USB端口扩展为4个USB端口（兼容USB 2.0、1.1）
数据速率：高达921.6 kbps
台式机箱，即插即用兼容性
总线供电–无需外部电源
具有1KB FIFO的高速UARTS可提高数据速率
枚举为标准COM端口
完整的调制解调器，硬件和软件流控制
软件可选RS-232 / 422/485
随附USB电缆，0.9 m（3英尺）