https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions
Product Info
RS-232/485/422 Interface Converter

RS-232/485/422 Interface Converter

Shenzhen 3onedata Technology Co.,Ltd
Region: China
Update: 07/25/2013
Key Specifications
1. 9VDC power input, 2500V optical isolation
2. Plug-and-Play(hot-pluggable, data format auto-sensing & self-adjusting)
3. Data direction auto-turnaround, no flow control is necessary
4. 1500W surge protection, 15KV ESD protection
5. 1800m transfer distance (115200bps)
6. RS-485/RS-422 connector RJ45, DB9M or 5 bit terminal block
https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions