Technical data

RS-232 Connections
Documentation Number: LES40xA-1105m Appendix A 71
Black Box Corporation - 1000 Park Drive - Lawrence, PA 15055-1018
www.blackbox.com -- Tech Support and Ordering: 724-746-5500 - Fax: [phone]
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
RS-232 Connections
72 Appendix A Documentation Number: LES40xA-1105m
Black Box Corporation - 1000 Park Drive - Lawrence, PA 15055-1018
www.blackbox.com -- Tech Support and Ordering: 724-746-5500 - Fax: [phone]
1 Port Serial Server Terminal Block Pin-out in RS-232 Mode
G
N
D
C
T
S
/
T
X
-
T
X
/
T
X
+
R
X
/
R
X
+
R
T
S
/
RX
-
1
2
3
4
5
RS-232
Signal Name
DTE RS-232 Terminal
Signal Ground --- GND 1
Clear To Send In CTS 2
Transmit Data Out TXD 3
Receive Data In RXD 4
Request To Send Out RTS 5
Figure 50. 1 Port Serial Server Terminal Block Pinout in RS-232
Mode