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RS-232 Cabling
F
F-3
Rx
Tx
DTR
GND
DSR
RTS
CTS
1
2
3
4
5
6
7
8
9
RS-232C
HYDRA
DB-9
DCD
Rx
Tx
DTR
GND
DSR
RTS
CTS
RI
1
2
3
4
5
6
7
8
9
COM
PC
DB-9
RS43 CABLE
(NULL MODEM)
FEMALE
MALE
PINS
KEY
DCD – DATA CARRIER DETECT
Rx – RECEIVE
Tx – TRANSMIT
DTR – DATA TERMINAL READY
GND – GROUND
DSR – DATA SET READY
RTS – REQUEST TO SEND
CTS – CLEAR TO SEND
RI – RING INDICATOR
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Figure F-2. Hydra (DB-9) to PC (DB-9) RS-232 Connection (Generic)