DTech DT-9003 User 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 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

DTech DT-9003 Specifications

General

Brand	DTech
Model	DT-9003
Category	Media Converter
Language	English

Summary

Overview

Performance Parameters

Interface Characteristics

Details interface compatibility with EIA/TIA RS-232C and RS-485/RS-422 standards.

Electrical Interface

Specifies DB9 female connector for RS-232 and DB9 male for RS485/RS422, with a 6-position terminal.

Connector and Signal Details

RS-232C Pin-out

Lists the pin assignments for the RS-232C interface connector.

RS-232C Interface Signals

Details the specific signals used within the RS-232C interface.

RS-485/RS-422 Output Signals and Pin-out

Shows the signal assignments and pin-out for the RS-485/RS-422 terminal board output.

Hardware Installation and Application

Communication Wiring Diagrams

RS-232 to RS-422 Conversion

Provides wiring diagrams illustrating the RS-232 to RS-422 conversion process.

RS232 to RS485 Conversion

Illustrates wiring diagrams for RS232 to RS485 conversion scenarios.

Troubleshooting

Communication Failure

Steps to diagnose and resolve issues related to communication failure.

Data Loss or Error

Guidance on checking data rate and format consistency to prevent data loss or errors.

Unstable Signal

Recommendations for ensuring signal stability, including termination resistors.