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Digi Edgeport 8-port RS232 to USB converter box with DB9 ports

Digi International

Digi International EPUSB8 8-port RS232 to USB laptop add-on card

SKU CH-JVEM-BKTD6 MPN EPUSB8

Eight-port DB9 RS232 to USB converter with one-metre A-to-B cable included

  • 8 RS232 serial ports from one USB connection
  • DB9 connectors for direct legacy device attachment
  • 1 metre USB A-to-B cable included in box
  • Digi Edgeport reliability for industrial serial links
  • Laptop add-on card form factor for portable expansion

Product identity

The Digi International EPUSB8 is an eight-port RS232 to USB converter built as a laptop add-on card for engineers and technicians who must attach legacy serial equipment to modern machines. It bridges DB9 serial gear to a single USB link without requiring internal slots or external power.

Deciding specification

The unit provides eight independent DB9 RS232 ports from one USB connection so a single laptop can drive multiple serial devices at once. Buyers who need fewer ports or a different physical interface should consider other models in the range.

Thermals noise and power

The converter draws power directly from the USB bus and operates silently with no moving parts. Typical use adds negligible heat to the host system and requires no separate power adapter.

How it compares

Measured against everything we stock in Laptop Expansion Cards, at today’s prices. Recalculated every night.

Price $371.99
Pricier than about 90% of the 10 comparable items (median $64.49).

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Specifications

Size & build
Shipping weight1.36 kg
Package size270 × 197 × 93 mm

Questions about this item

What does the 8-port RS232 count mean for a laptop?

It lets you connect up to eight legacy serial devices such as industrial controllers, modems or data loggers through a single USB link.

How does the USB connection limit the serial throughput?

The USB 1.1 link caps total bandwidth, so all eight ports share that throughput and cannot each run at the full RS232 line rate simultaneously.

What physical space and cable are needed to use this adapter?

The hub needs room for its eight DB9 connectors and ships with a one-metre USB A-to-B cable for the laptop connection.

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