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3-Port USB to RS232 Industrially Isolated DB9 Male Adapter


Quick Overview

Easy to install, the Industrial Isolated RS-232 serial adapter with DB-9 male port doesn't require configuration and ensures 2.5kV isolated protection to your connected PC.

Availability: In stock



Serial RS232 Port Isolation

The CM-3RS232i Industrially Isolated USB to 3-Port RS232 adapter features 2.5kV isolation to ensure up to 3 serial devices connected by DB-9 ports that require long range or multi-drop capabilities won’t be damaged between the connected PC and serial applications. Each port is protected by supporting both ESD and Transient electrical surges between PC and device

Working with the Industrial Isolated RS232 Adapter is easy, simply install the drivers and connect the 3-Port Serial adapter to your computer, plug in your serial devices, and you’re ready to go. Programming for this serial adapter is not required. The user of this adapter doesn't need to worry about IRQs, configuring aboard, power requirements, or connection schemes. Additionally, the isolated adapter is bus-powered to eliminate the need for an external power adapter or wall outlet.


  • Full compliance with the USB Specification 2.0 & 1.1
  • Compatible with all RS-232 protocols.
  • Supports transfer rate up to 230 kbps.
  • Supports 2.5kV Isolation
  • Supports ±15kV (air), ±8kV (contact) ESD protection; Isolated ground loops
  • Supports 40A (5/50ns) & Peak Pulse Power 250 W ( 8/20 us ) Surge and Transient spikes protection

Compatible with Windows 2000 / XP / Vista / 7 / 8 / 8.1 or higher, Windows Server 2003 / 2008 / 2008R2 / 2012 / 2012R2, Win CE and Mac OS 8.6, Linux 1.5.0 or higher

Additional Information

SKU CM-3RS232i
UPC 736983901743
Manufacturer CableMax
Length No
Color Black
OS Support No

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