DTech DT-9003 Handmatig - Pagina 2

Blader online of download pdf Handmatig voor {categorie_naam} DTech DT-9003. DTech DT-9003 3 pagina's. Commercial grade interface converter

T/R-

(transfer-)

opposite

side's

RXD+(receive+) to opposite side's TXD+(transfer+), RXD-

(receive-) to opposite side's (transfer-).

Communication mode supported:

Point to point / Four line full duplex

①

②

Point to multi-point / four line full duplex

③

Point to point / two line half duplex

Point to multi-point / two line half duplex

④

Note: to avoid signal reflections and interference, a matched

termination resistor (120Ω，1/4W) is required to wired at the

terminal of the line according to particular situation

Please be noted: this converter is port-powered, so normally

external power supply is not required. If you need it as your case

may be, the pin of VCC allows you to connect a 9V external power

supply to it.

V. Communication Wiring Diagrams

RS-232 TO RS-422 Conversion

RXD-

(receive-),

VI. Troubleshooting

1. communication failure

A. Check to see if RS-232 interface connection is correct

B. Check to see if RS-485 output interface wiring is correct

C. check to see if the wired terminal board is connected well