Comtrol DM ATS-XPe - Manual (Page 32)

32 PC104 RocketPort Option
Building Null-Modem Cables
Building Null-
Modem Cables Use the following figure if you need to build a null-modem cable. A null-modem
cable is required to connect the CONSOLE port to a PC COM port or to connect
DTE devices.
Note: You may want to purchase or build a straight-through cable and purchase a
null-modem adapter.
Building Straight-
Through Cables Use the following figure if you need to build a straight-through cable. Straight-
through cables are used to connect DCE devices.
AT
S
F
e
m
a
le
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
RJ45
4
5
1
8
7
3
6
2
Pins
20
5
RI N/A 9 22 RI
DB9
3
2
7
8
6
5
1
4
Pins
9
RJ45
5
4
1
3
6
7
Pins
2
8
N/A
DB25
2
3
4
5
6
7
8
20
Pins
22
PC
COM
P
o
r
t
AT
S
Fe
m
a
le
DB9
1
2
3
4
5
8
6
7
Pins
DCD
RxD
TxD or TRx-
DTR
GND
CTS
DSR
RTS or TRx+
Signal
DB9
1
2
3
4
5
8
6
7
Pins
DCD
RxD
TxD or TRx-
DTR
GND
CTS
DSR
RTS or TRx+
Signal
RI 9 9 RI
RJ45
6
5
4
2
3
8
7
1
Pins
N/A
RJ45
6
5
4
2
3
8
7
1
Pins
N/A
DB25
8
3
2
20
7
5
6
4
Pins
22
De
v
ic
e