Comtrol UP DeviceMaster Installation - Manual (Page 42)

42 - Connecting Serial Devices Hardware Installation and Configuration Guide: 2000451 Rev. J
Connecting Serial Devices
Refer to the hardware manufacturer’s installation documentation if you need help
with connector pinouts or cabling for the serial device.
This illustrates the DB9 connector signals.
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. For example, a null-modem cable can be used to
connect COM2 of one PC to COM2 of another PC.
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.
Pin 1
Pin 6
DB9 Male
RS-232
RI
CTS
RTS
DSR
GND
DTR
TxD
RxD
CD
Pin 1
Pin 6
DB9 Male
RS-422
Not used
RxD+
TxD+
Not used
GND
Not used
TxD-
RxD-
Not used
Pin 1
Pin 6
DB9 Male
RS-485
Not used
Not used
TRxD+
Not used
GND
Not used
TRxD-
Not used
Not used
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
mal
e
DB9
3
2
7
8
6
5
1
4
Pins
RJ45
5
4
1
3
6
7
Pins
2
8
Device
Ma
ster TxD+
TxD-
RxD+
Signal
Fe
ma
le
DB9
7
3
8
Pins
RxD+
RxD-
Signal
TxD+
TxD-
RxD- 2
GND GND 5
Device
Ma
ster
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