Rockwell Automation 2706-M1 MESSAGEVIEW 421 HARDWARE MANUAL User Manual
Page 103
6–10
Remote I/O and RS-232 Connections
Publication 2706–816
To an Allen-Bradley 6120 Serial Port
DB-9 Connector (Female)
(DCE)
DB-25 Connector
(DTE)
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
8
3
2
9
7
6
5
4
1
TXD
RXD
Common
CTS
RTS
CTS
RTS
DCD
DCD
DTR
DTR
DSR
DSR
RXD
TXD
Common
Note: If you create a cable, connect the cable shield to metal housing or pin 1 of the 6120 connector.
RS-232 Communication Cable
MessageView Terminal
6120 Serial Port
Shield
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
To an Allen-Bradley 1770-T3 Terminal Serial Port or Black Box
LD-485 Converter Box
DB-9 Connector (Female)
(DCE)
DB-25 Connector (Male)
(DTE)
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
8
3
2
20
7
6
5
4
1
TXD
RXD
Common
CTS
RTS
CTS
RTS
DCD
DCD
DTR
DTR
DSR
DSR
RXD
TXD
Common
Note: If you create a cable, connect the cable shield to metal housing or pin 1 of the 1770-T3 or LD-485.
RS-232 Communication Cable
MessageView Terminal
1770-T3 or LD-485 Serial Port
Shield
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25