Overvoltage protection for RS232

Expert Opto Bridge 0400 for better PC protection
  • Effective overvoltage protection due to galvanic isolation
  • Isolation voltage up to 2500 V
  • Data transmission rate up to 115.200 baud
  • Easy installation (no driver needed)
  • Prevent serious damage due to lightning strikes or interference voltages
Massive time and cost savings through plug-and-play drivers from our technology partners
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Key Features
  • Overvoltage protection by galvanic isolation
  • Isolation voltage max. 2500 V
  • Serial input voltage

-15 V to -6 V for logical 1
+15 V to +6 V for logical 0

  • Data transfer rate up to 115.200 Baud
  • Easy installation (no driver needed)
  • In addition to the data lines (receiver and transmitter lines), two handshake lines are supported in both directions (RTS/CTS)
  • Power supply of the serial interface via the connected devices
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  • Suitable for devices with RS232 connection


The Expert Opto Bridge 0400 is a plug adapter für the serial interface of the PC (RS232). It provides maximum protection against interferrences, failures and damage on the serial interface by electrically isolated data transmission.

The optical bridge provides an overvoltage protection by galvanic isolation of signals and voltages from potential damage to the PC and devices with a serial interface. At the same time, the electrically isolated data transmission provides maximum protection against interferrences, failures and damage to the serial interface, thus ensuring a trouble-free operation of the connected devices.

The Expert Opto Bridge 0400 offers protection against a wide range of disturbances caused by environmental influences:

  • Overvoltage due to lightning strikes
  • Overvoltage due to static discharges
  • Ground shifts caused by various mains circuits
  • Interference voltages on ground lines caused by motors or similar loads

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