Industrial Class Photoelectric Isolation Converter RS-232 TO RS-485/422
Part number: ATC-105
In Stock : Available

ATC-105 Isolation Interface Converter is compatible with RS-232C, RS-422, RS-485 standards and capable of converting single end RS-232 signal into RS-422 or RS-485 signal of balanced signal. The built in photoelectric isolator can offer 3500V isolation voltage and the rapid Transient Voltage Suppressor (TVS) can effectively inhibit lightning and ESD, prevent lightning strike and common code interference.

Connect PC, IPC, or portable computer via a DB9 female connector at RS-232 interface, and connect RS-422, RS-485 end via convenient 4-bit terminal. The RS-485 supports dual-line half duplex. The inner circuit of ATC-105 Photoelectric Isolation Interface Converter can detect data direction and switch to control it automatically, conveniently to form a RS-485 network without any shake hand signal. This kind of RS-485 control is fully transparent and need no software amendment for the former working modes basing on RS-232.

ATC-105 Photoelectric Isolation Interface Converter can provide credible connection for point to point, point to multi-point communication. The point to multi-point allows connecting 128 RS-422 or RS-485 interface devices with data transmission speed of 0-115.2KBPS. The 3 power supply and data flow indication light can indicate malfunction. It supports communication modes including RS-232C to RS-422, RS-232 to RS-485 conversion.


  • Point to point, point to multi-point communication
  • Industrial distribution system, industrial control automation
  • Road traffic control automation
  • Closed circuit monitoring
  • Security protection system
  • Intelligent card, check on work attendance gate safety system


Communication Parameters


Compatible with the EIA/TIA RS-232-C and RS-422 standard

Working Mode

Asynchronous half or full duplex

Transmission Speed


Transmission Media

Twisted-pair cable or shielded cable

Transmission Distance


Isolation Isolation voltage 3500VRMS 500VDC sequence
Protecting Grade

RS-232 interface 600W lightning strike and surge protection,

RS-422/RS-485 interface 1000W lightning strike and surge protection on each line

Electric Interface


RS-232C is DB9 Female


RS-422/RS-485 is four bit terminals

Physical Characteristics

Signal Indication

3 signal indication lights indicate TD RD and PWR

Power Supply

RS-232 is serial port power theft

RS-422/485 is power converter

Product Appearance

Plastic shell 76mmx54mmx23mm

Working Environment

-20℃ to 70℃, 5% to 95% relative humidity



1、product application

     Company products are widely used with the electric power, industrial control, telecommunications, commerce, banking, insurance, security, smart CARDS, and other industries, production and sales of the products of the company, supporting complete, cost-effective, timely and thoughtful service, products are exported to Taiwan, Hong Kong, South Korea, Thailand, the United States, Poland, Italy, Spain, Egypt, Russia, Norway, Singapore, Malaysia, Indonesia, and other national regions, well received by clients at home and abroad.


2、The connection instance figure