Rockwell Automation 2706-M1 MESSAGEVIEW 421 HARDWARE MANUAL - Manual (Page 102)

6–9 Remote I/O and RS-232 Connections
Publication 2706–816
To a DCE Device DB-25 connector
DB-9 Connector (Female)
(DCE)
DB-25 Connector
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
8
3
2
6
7
20
4
5
22
TXD
RXD
Common
CTS
RTS CTS
RTS
DCD DCD
DTR DSR
DSR DTR
RXD
TXD
Common
Note: If you create a cable, connect the cable shield to metal housing or pin 9 of MessageView terminal connector.
RS-232 Communication Cable
MessageView Terminal
DCE Device
RI
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
25
24
23
22
21
20
19
18
17
16
15
14
Shield
To an Allen-Bradley 1784-T45 or -T47 Laptop,
a VT100 Terminal, or an IBM AT

Compatible Personal
Computer – 25 pin
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
20
7
6
5
4
22
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 computer connector.
RS-232 Communication Cable
MessageView Terminal
25-pin computer port
RI
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
1
Shield