User`s manual

Serial Programming Tools l l Chapter 4
33
Type 3: To connect Smartio C104 PCI Series to a DTE 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 the DSR with DTR, DCD on the MOXA site.
If [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
C104 PCI
C104 PCI DTE Device
DB25 Male DB25 Male
TxD 2 2 TxD
RxD 3 3 RxD
GND 7 7 GND
RTS 4 4 RTS
CTS 5 5 CTS
DSR 6 6 DTR
DTR 20 20 DSR
DCD 8 8 DCD
PC COM2 port, serial printer,
terminal, or any DTE device
C104 PCI
C104 PCI DTE Device
DB25 Male DB9 Male
TxD 2 2 RxD
RxD 3 3 TxD
GND 7 5 GND
RTS 4 7 RTS
CTS 5 8 CTS
DSR 6 4 DTR
DTR 20 6 DSR
DCD 8 1 DCD