ATC-107N RS-232 to RS-422/485 Isolated Serial Converter

The ATC-107N RS-232 to RS-422/485 Converter is an industrial-grade, optically isolated serial converter designed for long-distance and noise-prone environments. It converts RS-232 signals to RS-422 or RS-485, supporting point-to-point and point-to-multipoint networks with communication distances up to 5 km and data rates up to 115.2 kbps. With metal housing, surge protection, and DIN rail mounting, it is ideal for SCADA, automation, and security systems.

Key Features

• Converts RS-232 to RS-422/RS-485 with automatic mode selection

• Supports asynchronous half-duplex (RS-232/485) and full-duplex (RS-422) operation

• Communication distance up to 5 km (600 bps), 1.2–2.4 km at higher baud rates

• Data rate from 0 to 115.2 kbps

• Photoelectric isolation (3500 V impulse / 500 V sequence) between interfaces

• Surge protection: 600 W on RS-232, 1000 W on each RS-422/485 line

• Supports point-to-multipoint networks with up to 128 RS-422/485 devices

• Automatic TXD direction control, zero-latency design

• 3 LED indicators for PWR, TXD, RXD

• Full metal enclosure with strong anti-EMI performance

• DIN rail mount for easy installation

• Adapter power included, with option for serial-port power stealing

Technical Specifications

Applications

• Point-to-point and point-to-multipoint RS-485 / RS-422 networks

• Industrial distributed control and automation systems

• Road traffic control and signal systems

• CCTV and closed-circuit monitoring networks

• Security and access control systems

• Attendance and intelligent card gate systems

• General long-distance serial communication where isolation and surge protection are required

What’s in the Box

• 1× ATC-107N RS-232 to RS-422/485 Isolated Converter

• 1× Power adapter

• 1× DB9 to RJ-45 RS-232 cable

• 1× Quick installation / wiring guide

(Adjust if your actual packing is slightly different.)

FAQ (4–6 Q&A)

1) How many RS-485/RS-422 devices can the ATC-107N support?
The converter supports point-to-multipoint networks with up to 128 RS-422/RS-485 devices, depending on line quality and termination.

2) What is the maximum communication distance?
With proper cabling and termination, the ATC-107N supports up to 5 km at lower baud rates (around 600 bps) and 1.2–2.4 km at higher speeds like 38.4–115.2 kbps.

3) Does the converter require an external power supply?
The RS-232 side can steal power from the serial port, but an external adapter (included) or power from the RS-422/485 side is recommended for stable operation, especially in longer networks.

4) Is there electrical isolation between RS-232 and RS-485/422?
Yes. The converter uses photoelectric isolation with up to 3500 V impulse isolation and surge protection (600 W / 1000 W) to protect equipment from lightning and transients.

5) What indicators are available on the converter?
Three LEDs are provided for Power (PWR), Transmit (TXD), and Receive (RXD), helping in troubleshooting and monitoring data traffic.

6) Can the ATC-107N be DIN rail mounted?
Yes. The converter supports standard DIN rail mounting, making it easy to install in control panels and industrial enclosures.