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Black metal box with eight terminal blocks and USB Type-B port

USBGear

USBGear SA-8PXTB 8-Port Terminal Block RS232/422/485 to USB 2.0 Serial Cable

SKU CH-VMRW-BTW9Z

Adds eight RS232/422/485 serial ports via USB 2.0 with terminal block connectors and 921.6Kbps per port

  • ColorBlack
  • Connector Number8
  • SpecificationsSerial Modes: RS232, RS422, RS485
  • Add 8 serial ports via USB 2.0 for legacy device integration
  • Rugged metal enclosure with terminal blocks suits harsh industrial environments
  • Supports RS-232, RS-422 and RS-485 modes on every port
  • Up to 921.6Kbps per port with 128-byte FIFO buffers
  • Daisy-chain more modules through the downstream USB 2.0 port

8-Port Industrial Serial Converter

The USBGear SA-8PXTB adds eight configurable serial ports to a host computer through a single USB 2.0 connection. Each port operates independently in RS-232, RS-422 or RS-485 modes, supporting 3-wire, 4-wire or 2-wire wiring schemes. It is designed for engineers and system integrators connecting PLCs, sensors or legacy equipment in industrial automation and laboratory environments.

USB 2.0 Upstream with Daisy-Chain Expansion

The rugged metal enclosure mounts in panels or racks and draws power from the upstream USB Type-B port, which uses a screw-lock mechanism to resist vibration. A downstream USB 2.0 port allows additional converters to be daisy-chained, expanding the serial network without consuming extra host ports. Terminal block connectors provide secure, custom wiring for each of the eight channels.

128-Byte FIFO Buffers and 921.6Kbps Throughput

Built-in 128-byte FIFO buffers and hardware-based auto transceiver turnaround maintain data integrity at baud rates up to 921.6Kbps per port. LED indicators give immediate visual confirmation of link activity and signal status. The package includes the converter unit and mounting hardware; driver software and detailed configuration utilities are available from the manufacturer's support resources.

Highlights

  • Add 8 serial ports via USB 2.0 for legacy device integration
  • Rugged metal enclosure with terminal blocks suits harsh industrial environments
  • Supports RS-232, RS-422 and RS-485 modes on every port
  • Up to 921.6Kbps per port with 128-byte FIFO buffers
  • Daisy-chain more modules through the downstream USB 2.0 port

Specifications

BrandUSBGear
ModelSA-8PXTB
ColorBlack
Connector Number8
SpecificationsSerial Modes: RS232, RS422, RS485

Questions about this item

What is the maximum sustained data rate per port before the 128-byte FIFO buffers become the limiting factor?

Each port supports up to 921.6Kbps, with 128-byte FIFO buffers handling burst traffic before flow control engages.

How much heat or noise does the metal enclosure produce when all eight ports run continuously at 921.6Kbps?

The rugged metal housing acts as a passive heatsink; with no moving parts the unit runs silently and stays cool under full load.

Which host interface and cable type must I already have to connect this converter?

A USB 2.0 Type-B upstream port with a screw-lock cable is required for the host connection.

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