RS232 TO RS422/RS485
RS232 to RS485 / RS422 adapter that support transfer rates up to 1M baud. With RS422 mode selected, the interface can be configured for four-wire operation with CTS / RTS hardware handshaking. In RS422 mode the transmitter is always on. With RS485 mode selected, the interface can be configured for four-wire full duplex operation or two-wire half duplex operation with optional echo back. The transmitter enable is controlled automatically with a turn-around delay of less than 20us. Optional RS422 / RS485 termination and bias resistors can also be configured. The RS232 interface can be configured to be a DCE or a DTE type. The default link settings select a DCE type which allows use of a straight-through DE-9S to DE-9P cable.
- Operating temperature of -20°C to +60°C
NOTE : This product comes supplied with a universal switch mode PSU and unlike many inferior products does not rely on borrowing power by stealth from the host RS232 port with unpredictable results. Nor does it rely on using the RTS signal to switch the data direction in RS485 mode - this is done automatically by the hardware. It has both screw terminal and DB9 connector options for connectivity.
|ES-R-2001B-M / ES-R-2101B-M Manual||1.2||Download|
|ES-R-2101B-M||1||Metal||DB-9 (Opto-isolated version)|