DTech DT-9003 Manual

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
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
RS485 or 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)
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)
RS-232C Interface signal
9 Ring indication RI
RS-485 /RS-422 output signal and pin-out of terminal board
DB9 Male Single output RS-422 Full
duplex
1 T/R+ Send(A+)
2 T/R- Send (B-)
3 RXD+ Receive(A+)
4 RXD- Receive (B-)
5 GND Ground wire
6 VCC Power
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+),
RS-485 Half
duplex
RS-485 (A+)
RS-485 (B-)
N/C
N/C
Ground wire
Power