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Compact USB-to-serial adapter with mini USB port terminal block and included cable

B&B Electronics Mfg. Co

B&B Electronics Mfg. Co 485USBTB-2W camera accessory

SKU CH-QCT0-FCFY9 MPN 485USBTB-2W

Converts USB 2.0 to RS-485 via terminal block for industrial device connectivity

  • Adapter typeUSB
  • DetailsConnector on Second End:1 x Terminal Block - RS-485 Serial C
  • In the box485USBTB-2 W Data Transfer Adapter 1 x USBAMBM-3F 3 ft (1 M)
  • Connects legacy RS-485 devices to modern USB 2.0 ports
  • Terminal block second end simplifies industrial wiring connections
  • Includes one meter USB cable for immediate setup
  • USB port powered design needs no external supply
  • Appears as standard COM port in Windows Device Manager

USB to RS-485 conversion adapter

The B&B Electronics 485USBTB-2W connects legacy RS-485 serial devices to a modern USB 2.0 Mini-B port on a PC or hub. It draws power directly from the USB bus so no external supply is needed. Windows enumerates the unit as a standard COM port for existing software. A one-metre USB cable and a spare terminal block are included.

Terminal block wiring for industrial gear

The second end presents a pluggable terminal block that accepts bare wires from RS-485 equipment such as sensors, PLCs or HMIs. This removes the need for a DB-9 cable or gender changer in tight cabinets. The converter occupies a single USB port and leaves adjacent ports free. Driver installation is handled through the supplied CD ROM.

Sustained operation on bus power

Because the adapter is fully USB powered, its thermal load stays low during continuous polling or long data-logging sessions. The RS-485 transceiver maintains signal integrity over extended cable runs without voltage sag. No fan or heatsink is required, so the unit runs silently in sealed enclosures. The spare 7372 terminal block provides a quick swap if a connector is damaged.

How it compares

Measured against everything we stock in Camera Extras & Accessory Packs, at today’s prices. Recalculated every night.

Price $75.99
Pricier than about 68% of the 2,266 comparable items (median $39.99).

Specifications

Product
Brand nameB&B
Model name485USBTB-2 W
Adapter typeUSB
Size & build
Shipping weight0.15 kg
Package size152 × 147 × 23 mm
In the box
In the box485USBTB-2 W Data Transfer Adapter
1 x USBAMBM-3F 3 ft (1 M) USB Cable
1 × 7372 Replacement TB

Questions about this item

What is the maximum RS-485 data rate the 485USBTB-2W sustains under continuous load?

The converter uses USB 2.0 Mini-B so sustained throughput follows the USB 2.0 bulk endpoint limit.

How much heat does the adapter produce when powered from the USB port all day?

It draws power only from the USB port, so heat stays within normal USB 2.0 bus-powered device levels.

Which terminal-block replacement is required if the original 7372 block is lost?

The package includes a 7372 Replacement TB that matches the RS-485 terminal block on the converter.

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