Schneider Automation Modicon Quantum Ethernet Guide de l'utilisateur Page 126

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CPU Modules
126
35013379 02 October 2007
Modbus
Connector
Pinouts
All Quantum CPUs are equipped with a nine-pin RS-232C connector that supports
Modicon’s proprietary Modbus communication protocol. The following is the Modbus
port pinout connections for nine-pin and 25-pin connections.
Modbus Ports
Pinout
Connections
The following figure shows the Modbus port pinout connections for nine-pin and 25-
pin connections.
Note: Although the Modbus ports electrically support existing Modbus cables, it is
recommended that a Modbus programming cable (Part # 990NAA2620 or
990NAA26350) be used. This cable has been designed to fit under the door of a
Quantum CPU or NOM module.
5
IBM-AT
9-Pin Female
Quantum
9-Pin Male
Quantum
9-Pin Male
IBM-XT
25-Pin Female
CD
RX
TX
DTR
GRND
DSR
RTS
CTS
1
2
3
4
5
6
7
8
1
2
3
4
6
7
8
9
SHIELD
RX
TX
DTR
GRND 5
DSR
RTS
CTS
NC
1
2
3
4
6
7
8
9
SHIELD
RX
TX
DTR
GRND
DSR
RTS
CTS
NC
RX
RTS
CTS
DSR
GRND
NC
1
2
3
4
5
6
7
8
SHIELD
TX
20DTR
This document provided by Barr-Thorp Electric Co., Inc. 800-473-9123 www.barr-thorp.com
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