RS-232 Connections
70
Appendix A
Manual Documentation Number: ESR90x-0508m
B&B Electronics Mfg Co Inc – 707 Dayton Rd - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 – www.bb-elec.com
B&B Electronics Ltd – Westlink Commercial Park – 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 49. RS-232 Connections in a DB-9 Connector
