... RS232 to RS 422, Port-powered from RS232 port (TXD,RTS,DTR): no external power is necessary TLC422 is the interface converter ... high quality low price data interface conversion product.Features:1. Port-powered from RS232 port (TXD,RTS,DTR): ... turnaround, no flow control is required 5. Point to multi point, support 128 nodes loopbackSpecification: Standards: ... -04-24 04:45:49 Sell RS232 to RS422 Converter