Rockwell-automation 2706-M1 MESSAGEVIEW 421 SER.A INSTALLATION DATA User Manual Page 2

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MessageView 421 Display Terminals Series A: RS-232 Port Adapter2
Publication 2706-5.1 – January 1997
To install the RS–232 Port Adapter, follow these steps:
1. Turn off power to the MessageView terminal.
2. Locate the RS-232 port (a 9-pin D connector).
3. Insert the female end of the RS-232 Port Adapter into the
terminal’s male RS-232 port connector.
4. Tighten the locking screws finger tight.
5. Turn on power to the terminal.
The Adapter is used to swap the RTS/CTS handshake signals on the
RS-232 port. This converts the MessageView terminal into a
standard DCE device.
DB-9 Connector (Female)
(DCE)
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
TXD
RXD
Common
RTS
CTS
DCD
DTR
DSR
MessageView Terminal RS-232 Port
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
RS-232 Port Adapter
(Part #W77128-144-52)
Pinout of the RS-232 Port
Adapter
Allen-Bradley, a Rockwell Automation Business, has been helping its customers improve
productivity and quality for more than 90 years. We design, manufacture and support a broad
range of automation products worldwide. They include logic processors, power and motion
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Allen-Bradley Headquarters, 1201 South Second Street, Milwaukee, WI 53204 USA, Tel: (1) 414 382-2000 Fax: (1) 414 382-4444
Publication 2706-5.1 – January 1997
Supersedes 2706-5.1 Dated December 1996
40061-399-01(B)
Copyright 1996 Allen-Bradley Company, Inc. Printed in USA
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