When should I use a serial RS232 to RS485 converter?
Port-powered RS485 to RS232 converters are mostly used in industrial and commercial environment. The reason is that the RS485 converter can be used for multi-drop networks, meaning that you for example can connect multiple RS485 devices to 1 computer. Up to 32 devices can be connected in 1 network to communicate on a single pair of wires (plus a ground wire). This type of communication is called half-duplex communication. Most quality RS-232 to RS-485 adapter can communicate in this manner of up to 4000 feet (1200 meters). RS 232 to RS 485 converter is also fairly resistant to noise which is one more reason why it is favored in industrial environments.

Guard Your Value Equipment
A built-in transient voltage suppressor (TVS) supports 600W anti-surge, effectively guard your value devices from the hazards of transient surges, lightning.

No Driver Required
Auto control data flow direction of I/O circuit feature makes the RS232 to 485 adapter fully plug-and-play.

Port-Power
No external power supply required, it is port-powered from RS232 data lines and low consumption electricity.

Mini-Size with 2 screws and terminal block

Standard: EIA/TIA RS232C / RS485
Baud Rate: 300bps - 115.2kbps
Working Mode: 2 wire asynchronous half-duplex
Communication Mode: Point to Point, Point to Multipoint
Transmission Media: Twisted Pair (Wire diameter >= 0.5mm) or Shielded wire
Transmission Distance: RS232 Interface: up to 50ft (15m); RS485 Interface: up to 4000ft (1.2km)
Surge Protection: RS485 Interface, Each wire 600W

Original Packing Included
2 X Serial 232 to 485 Converter DT-9000
2 x Terminal Board
1 x User Manual