Features:

1) Converter mode: convert from EIA-232 data into EIA-485
2) EIA standard: semiduplex EIA485
3) Particular serial protection circuit, hot inset and pull
4) Built-in intelligent module, automatically recognise RS-485 signal direction, no need CTS control
5) Signal: A, B, GND
6) Transfer rate: 50bps-115.2kbps
7) Transfer distance: 1.0km-1.2km
8) Power supply: serial port provide power, no need outer power
9) Operate asynchronism, point to point or several ponints
10) Directly plug onto serial port to work
11) Connector: negative or positive DB9(RS-232 port), six holes connecting leads pole standard configure(RS-485 port)
12) IR-1101 are able to prevent static, 485 port could defend thunder

Application:

1) Point to point, point to several points communication
2) Industry gather distributing system, industry control automatization
3) Road traffic control automatization
4) Closed circuit television surveillance
5) Security and protection system
6) Intelligent card, check on work attendance door system