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RS-232 Connections
Manual Documentation Number: ESP901-902_0508m Appendix A 71
B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 – www.bb-elec.com
B&B Electronics Ltd – Westlink Commercial Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445 – www.bb-europe.com
A
A
P
P
P
P
E
E
N
N
D
D
I
I
X
X
A
A
:
:
R
R
S
S
-
-
2
2
3
3
2
2
C
C
O
O
N
N
N
N
E
E
C
C
T
T
I
I
O
O
N
N
S
S
Serial Server DB-9 Pin-outs in RS-232 Mode
RS-232
Signal Name
DTE RS-232 DB-9M
Pin
Carrier Detect In DCD 1
Receive Data In RXD 2
Transmit Data Out TXD 3
Data Terminal Ready Out DTR 4
Signal Ground --- GND 5
Data Set Ready In DSR 6
Request To Send Out RTS 7
Clear To Send In CTS 8
Ring Indicator In RI 9
Figure 60. RS-232 Connections in a DB-9 Connector