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RS232 Optical Isolator, 3-wire, 1.5KV

  • Model: AN232ISO
  • In Stock


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This port-powered RS232 optical isolator is a reliable and effective protection against all surges, static electricity, lightning strikes and ground loops. It effectively protects your RS232 line and your equipment and data communication against data loss and equipment damage.

This particular RS232 isolator is a 3-line isolator which protects RXD, TXD and GND with up to 1500V constant voltage, 600W surge protection and 15KV ESD protection.

No external power is required for this RS232 isolator since it is port powered from the TXD signal, alternatively RTS and DTR, so no external power supply or flow control of any kind is needed. Notice that port-power is required from both sides of the isolator.

Two standard DB9 connectors, a female and a male, one at each side of the converter, makes it easy to connect this RS232 isolator to any standard DB9 RS232 cable.

Overall features
  • Isolates TX, RX and GND lines
  • Baud rate: 300 - 57,600bps
  • 1500V optical isolation
  • 1500W / 600W/ms ESD protection
  • DB9 interfaces for easy connection

Useful optional accessories
(not included)

Null modem adapter
Null modem adapter

DB9 to RJ45 adapter
DB9 - RJ45 adapter

DB9 gender changer
Gender Changer

5V power supply
5V Power supply
Model number AN232ISO
Lines protected TXD, RXD, GND
Baud rate 300 - 57,600bps
Power Port-powered from
Current draw Less than 15mA
Interface PC side DB9 female connector
Interface device side DB9 male connector
Optical isolation 1500V
ESD protection 1500W / 600W/ms
Working mode Asynchronous, full transparant RS232 transmission
Standards EIA/TIA RS-232C / RS232
Operating Temp. -13°F to 158°F (-25°C to 70°C)
Operating humidity 5% to 95% - No Condensation
Dimensions 2.47" x 1.33" x 0.70"
(62.8 mm x 33.8 mm x 17.8 mm)
Warranty 1 year limited warranty

For alternative RS232 isolation solutions please see our full selection of serial converters and isolators.

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Date Added: 11/14/2014 by John Marcus
5 of 5 Stars!5 of 5 Stars!
Recommended, thanks for the fast shipping!

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Date Added: 09/01/2013 by Bryan Gallagher
4 of 5 Stars!4 of 5 Stars!
Good isolator, has been working fine so far. Fast shipping and good support. Would buy again.

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Date Added: 08/22/2011 by Kathleen Mabry
5 of 5 Stars!5 of 5 Stars!
We are using this isolator to isolate our water treatment system sensors from a PC located about 100...

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Date Added: 07/13/2011 by Brian Baker
5 of 5 Stars!5 of 5 Stars!
I bought this rs232 optical isolator to isolate my computer from a temperature probe located 10 feet...

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Date Added: 07/12/2010 by Mike Johnson
4 of 5 Stars!4 of 5 Stars!
Works fine, easy to use.

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