ATC-131 - Port-Powered RS-232 Isolator


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MPN: ATC-131

Manufacturer: ATC

Delivery: Ships within 7-14 business days
Free shipping to the US on orders over $100

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Product Information

Product Description

Authorized North America Distributor Stamp

The ATC-131 optically isolates and protects the transmit and receive lines of your RS-232 port from ground loops and power surges up to 2500V RMS for one minute. The data stream is converted from an electrical pulse to an optical beam, then back to an electrical pulse. Because there is no electrical connection between the DTE and DCE sides of the isolator, the ATC-131, unlike a surge suppressor, will not pass large sustained power surges through to your equipment. 

This isolator will protect both the transmit and receive lines at baud rates up to 57.6K without the need of an external power supply. Power is derived through the transmit and handshake lines. Special circuitry allows the ATC-131 to be powered regardless of the state of the handshake lines. At least one handshake line must be connected on each side of the isolator. Note that handshake line signals are not passed through the isolator.

Common applications include:

  • Bank, railway, electric power, post office, insurance, finance, administrative organs
  • Various multi-user systems including UNIX
  • Protect various multi-user terminals and hosts
  • Protect satellite receiver
  • Protect program controlled exchanger, charge terminal, attendant
  • Protect multi-user card
  • Protect non-ground RS-232 device
  • Protect the MODEM and router


  • Protect serial port, inhibit static and surge, prevent ground loop and surge damaging devices
  • Adopt latest high voltage photoelectric parts, powerful anti-jamming capacity
  • Support RS-232 asynchronous communication standard, direct insert into RS-232 interface serially, convenient operation
  • Compact size, optional manifold signals and suitable for various devices.
  • Interface feature: Conform to EIA RS - 232 and CCITT v. 24 asynchronous protocol
  • Electric interface: Use the DB9 connector on both sides

Documents and Drivers


ATC-131 Datasheet

ATC-131 FCC Certificate

ATC-131 EMC Certificate

ATC-131 ROHS Certificate



Asynchronous full duplex


RS232: DB9 female, RS232: DB9 male


63mm x 33mm x 17mm


Plastic shell


5% to 95%


  • Interface feature: Conform to EIA RS - 232 and CCITT v. 24 asynchronous protocol
  • Electric: Use the DB9 connector on both sides


2500V in succession or 7500V pulse



Power Supply

To the RS-232 port (TXD, RTS or DTR)

Temperature Range

-20ºC to 70ºC (-4ºF to 158ºF)

Transmission Speed


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