B&B Electronics ESR901WB - Manual User Manual
Page 57
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Manual Documentation Number: ESR901WB-2907m
pn6870-rev002
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 Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445 –
www.bb-europe.com
47
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p
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p
p
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n
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d
d
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x
D
D
:
:
R
R
S
S
-
-
2
2
3
3
2
2
,
,
R
R
S
S
-
-
4
4
2
2
2
2
&
&
R
R
S
S
-
-
4
4
8
8
5
5
C
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DB-9M
Pin
RS-232
Signal
RS-232
Designation
DTE
1 Carrier
Detect
DCD
In
2
Receive Data
RXD
In
3
Transmit Data
TXD
Out
4
Data Terminal Ready
DTR
Out
5
Signal Ground
GND
---
6
Data Set Ready
DSR
In
7
Request To Send
RTS
Out
8
Clear To Send
CTS
In
9 Not
connected NA NA
Figure 18. RS-232 Connections in a DB-9 Connector
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