DTech DT-9003 Manuals

DT-9003 Commercial grade interface converter Manual I. Overview The Converter is compatible with the RS-232, RS-485 standard. RS-232 signal is converted to RS485 or RS422 balanced differential signal; no need of external power supply, it adopts the unique "RS-232 charge pump" to drive the whole circuit inside; there is zero delay automatic transceiver conversion device in the circuit, and I/O circuit prevents collision to automatically control data flow direction, thereby it ensures that the program written on RS232 mode is no need to be changed and safely be operated in RS485 or RS422 mode, fully ensure it’s compatible with for existing software and hardware interface. II. Performance parameter 1. Interface characteristics: compatible with EIA/TIA RS-232C, RS-485/RS-422 standard 2. Electrical interface: DB9 female connector at RS-232 end, DB9 male connector at RS485/RS422 end, with 6 position terminal board 3. Working mode: Asynchronous Full Duplex, half duplex automatic selection of differential transmission, without jumper settings 4. Transmission medium: twisted pair wire or shielded wire 5. Transmission rate: 300BPS-115.2KBPS 6. Size: 64mmX33mmX17mm 7. Use of the environment: -20 degrees to 70 degrees, relative humidity of 5% to 95% 8. Transmission distance: 1200 meters (RS-485 end), 5 meters (RS-232 end) III. Connector and Signal RS-232C pin-out DB9 Female (Pin) RS-232C Interface signal 1 Protective Grounding 2 Receive data SIN (RXD) 3 Send data SOUT (TXD) 4 Data terminal ready (DTR) 5 Ground signal (GND) 6 Data setting ready (DSR) 7 Request send (RTS) 8 Clear send (CTS) 9 Ring indication RI RS-485 /RS-422 output signal and pin-out of terminal board IV. Hardware installation and application The product is designed with universal adapter plug DB9 M / DB9 F. Its output interface comes with a terminal block, which is connected with twisted pair or shielded cable, making it quite convenient for either connection or dis-assembly. T/R+, T/R- stands for receiving / sending A+ B-, GND stands for Ground. VCC stands for Positive Supply voltage. In RS-485 half duplex connection mode, connecting T/R+ (send / receive +) to opposite side’s A+ and T/R- (send / receive -) to opposite side’s B-; In RS-422 half duplex connection mode, connecting T/R+ (transfer+) to opposite side’s RXD+ (receive+), DB9 Male Single output RS-422 Full duplex RS-485 Half duplex 1 T/R+ Send(A+) RS-485 (A+) 2 T/R- Send (B-) RS-485 (B-) 3 RXD+ Receive(A+) N/C 4 RXD- Receive (B-) N/C 5 GND Ground wire Ground wire 6 VCC Power Power