In order to carry through remote digital communication between computers with various standard
series interfaces converter facilities or intelligent instruments, it needs inter exchange of standard series
interface converter of compatible RS-232C and RS-485 standard is able to convert mono-end RS-232 signal
to balance difference RS-485 signal and extend the communication distance to 1.2km.
No external power
but adopts a particular RS-232 charge pump to drive the system, and gains electricity without initializing the
RS-232 series interface. An internal zero delay auto transceiver and particular I/O circuit automatically
control the data stream direction instead of an handshake signal (for example RTS, DTR etc).
There by inguarantees the function under RS-485 without changing the program compiled under RS-232 half-duplex
mode and assures the adaptation to current operation software and interface hardware. The transmission
rate of 300-115.2kbps. Is capable of applying between host computers, host computer and is extensions or
external equipment and forms dot to dot, dot to dots remote and multi-communication network, It implements
multi-machine response communication and commonly used in systems of industrial automation control allone-card.
Door safe, car parking, ATM, bus charge, eatery sell out, staff attendance management, and toll
Interface feature: RS-232C RS-485 standard interface compatible with
Electric interface: RS-232 end DB9 hole connector RS-485 end DB9 needle
connector with connection pole
Working mode: asynchronism half-duplex difference transmission
Transmission media: twisted -pair or STP
Transmission rate: 300-115.2KBPS
External discharge dimension: 63mm X33mmX17mm
Working circumstance : - 25 to 70 degree C, relative humidity 5% to 95%
Transmission distance: 1,200m (RS-485 end) 5m(RS-232 end)