Moxa Technologies C168HS user manual Type 1 To connect Smartio C168 Series to a DTE device

Connection Option (Opt8x) and Cable Wiring

Type 1: To connect Smartio C168 Series to a DTE device.

Opt8A/S

Straight-through Cable

PC COM2 port, Serial Printer,

Terminal, or any DTE Device

Opt8A/S

DB25 Female

RxD	2		2
TxD	3		3
CTS	4	4
RTS	5	5
DTR	6		6
DSR	20		20
GND	7		7
DCD	8		8

Null Modem Cable Opt8B/C

DTE Device

DB25 Male

TxD

RxD

RTS

CTS

DSR

DTR

GND

DCD

PC COM2 port, Serial Printer, Terminal, or any DTE Device

Opt8B/C			DTE Device
DB25 Male			DB25 Male
TxD	2	2	TxD
RxD	3	3	RxD
RTS	4	4	RTS
CTS	5	5	CTS
DSR	6	6	DSR
DTR	20	20	DTR
GND	7	7	GND
DCD	8	8	DCD

Smartio C168H/HS User’s Manual 5-3