User`s manual

Connection Option and Cable Wiring
Intellio C320Turbo User's Manual 5-5
Type 3: Connecting UART Module to a DTE device with 3-pin wiring.
If the “Hardware flow control” feature is set to “ON”, you must loop back
(or short) the RTS with CTS and DSR with DTR, DCD on MOXA site,
indicated in dash-lines of the following diagrams. If the “Hardware flow
control” feature is set to “OFF”, you could just leave RTS, CTS, DSR,
DTR, DCD open, ignoring the connection indicated in dash-lines.
PC COM2 port, Serial Printer,
Terminal, or any DTE Device
C32045T/71T
C32045T/71T DTE Device
DB25 Female Cable Wiring DB25 Male
Connector Connector
RxD 2 2 TxD
TxD 3 3 RxD
GND 7 7 GND
CTS 4 4 RTS
RTS 5 5 CTS
DTR 6 6 DSR
DSR 20 20 DTR
DCD 8 8 DCD
PC COM2 port, Serial Printer,
Terminal, or any DTE Device
C32047T
C32047T DTE Device
DB25 Male Cable Wiring DB25 Male
Connector Connector
TxD 2 2 TxD
RxD 3 3 RxD
GND 7 7 GND
RTS 4 4 RTS
CTS 5 5 CTS
DSR 6 6 DSR
DTR 20 20 DTR
DCD 8 8 DCD