C H A P T E R 3 - S E R I A L I N T E R F A C E
7
1 - 8 7 7 - 8 7 7 - 2 2 6 9
w w w . b l a c k b o x . c o m
J 1
J 2
S I G N A L
F i g u r e 8 : D B 9 M t o D B 9 F e m a l e N u l l M o d e m C a b l e
1
N/C
DCD
2
3
RXD
3
2
TXD
4
6
DTR
5
5
GND
6
4
DSR
7
8
RTS
8
7
CTS
9
N/C
RI
Shell
Shell
GND
J1
6
1
9
5
1.70
72.00
1
1.70
5
9
6
J2
If you previously used a straight through cable to connect your PC to your device, you’ll
need to use a null modem cable or adapter to connect the MDR292A to that device.
DESIGN TIP
