
DeviceMaster PNIO | UP User Guide
: 2000639 Rev. A
Connecting Serial Devices - 39
Connecting Serial Devices
DB9 Null-Modem
Cables (RS-232)
Use the following figure if you need to build an RS-232 null-modem cable. A null-
modem cable is required for connecting DTE devices.
Note:
You may want to purchase or build a straight-through cable and purchase a
null-modem adapter.
DB9 Null-Modem
Cables (RS-422)
Use the following figure if you need to build an RS-422 null-modem cable.
Note:
RS-422 pinouts are not standardized. Each peripheral manufacturer uses
different pinouts. Refer to the peripheral documentation to determine the
pinouts for the signals above.
DB9 Straight-
Through Cables (RS-
232/485)
Use the following figure if you need to build an RS-232 or RS-485 straight-through
cable. Straight-through cables are used to connect modems and other DCE
devices. For example, a straight-through cable can be used to connect COM2 to a
modem.
Device
Ma
ster
TxD
RxD
RTS
CTS
DSR
GND
DCD
DTR
Signal
RxD
TxD
CTS
RTS
DTR
GND
DCD
DSR
Signal
DB9
2
3
8
7
4
5
1
6
Pins
DB25
3
2
4
7
8
6
Pins
20
5
Fe
ma
le
DB9
3
2
7
8
6
5
1
4
Pins
RJ45
5
4
1
3
6
7
Pins
2
8
De
viceMas
te
r
TxD+
TxD-
RxD+
Signal
Fe
mal
e
DB9
7
3
8
Pins
RxD+
RxD-
Signal
TxD+
TxD-
RxD- 2
GND
GND 5
D
eviceMas
ter
DB9
1
2
3
4
5
8
6
7
Pins
DCD
RxD
TxD or TRxD-
DTR
GND
CTS
DSR
RTS or TRxD+
Signal
DB9
1
2
3
4
5
8
6
7
Pins
DCD
RxD
TxD or TRxD-
DTR
GND
CTS
DSR
RTS or TRxD+
Signal
Fe
mal
e
RI
9
9
RI
RJ45
6
5
4
2
3
8
7
1
Pins
N/A
DB25
8
3
2
20
7
5
6
4
Pins
22
Содержание 99531-9
Страница 1: ...PROFINET IO User Guide ...
Страница 60: ...60 Configuring a Serial Port DeviceMaster PNIO UP User Guide 2000639 Rev A Configuring a Serial Port ...
Страница 88: ...88 IO Data Handling DeviceMaster PNIO UP User Guide 2000639 Rev A IO Data Handling ...
Страница 138: ...138 Managing the DeviceMaster DeviceMaster PNIO UP User Guide 2000639 Rev A Managing the DeviceMaster ...
Страница 148: ...148 RedBoot Procedures DeviceMaster PNIO UP User Guide 2000639 Rev A RedBoot Procedures ...