RS-232 to RS-485 (4W)/ RS-422 Digital Converter
ADA-1040D

RS-232 to RS-485 (4W)/ RS-422 Digital Converter* The prices are given in the response to the offer.
ADA-1040D Digital Converter is used to extend RS232 ports of device using for communication the signals: Tx, Rx, RTS, CTS, DTR, DSR. The converter receives data from RS-232 port and sends them via RS485(4W) / RS422 to second converter together with information about line condition of RS232 interface. It is possible to configure the baud rate (up to 230,4 kbps), number of data bits, parity or no parity and number of stop bits – the setting of RS-232 can be different on both sides of RS485(4W) / RS422. Additionally it is possible to set baud rate on RS485(4W) / RS422 link.
Using RS485(4W) / RS422 bus enables to extend the RS232 device port at a distance 1200m, provides galvanic isolation between connected devices and resistance to interference in the transmission line.
ADA-1040D is equipped with DSUB-9 female connector from RS232 interface and screw terminal block from RS485(4W) / RS422 and power supply.
Converter has 1kVDC or 3kVDC galvanic isolation and 5kVDC optoisolation in signal line. It separate RS232 form RS485/RS422 interface and protect device connected to RS232 port from overvoltage on RS485/RS422 bus and power circuit. Overvoltage protection on each RS485/RS422 line was made on base overvoltage LEDs and fuses.
Example of connection ADA-1040d converter