Rockwell-automation 1734-485ASC POINT I/O ASCII User Manual Instrukcja Użytkownika Pobierz pdf (Strona 61)

1 Publication 1734-UM009B-EN-P - July 2003

Appendix

Using the ASCII Modules with the

ControlLogix System Application Examples

About These Examples

For these application examples, the 1734-PDN POINT I/O interface

was used to interface with the DeviceNet network. The ASCII modules

act as a normal slave to the master scanner. The data that is sent

to/from the scanner contains the ASCII data and some specialty bytes.

Serial Port Connector

The ASCII devices are connected to the ASCII modules via a:

· 3-wire communications cable for the RS-232 network.

· 2-wire communications cable for the RS-485 network.

· 4-wire communications cable for the RS-422 network.

Table B.1 Module Terminations

Terminal RS-232 RS-485 RS-422

0Tx

S+

Tx+

1Rx

NC Rx+

2NCS-

Tx-

3NCNCRx-

4 NCNCNC

5 NCNCNC

6NCCGCG

7SGSGSC

1 S+ and Tx+ are transmit from the module

2 S- and Rx- are receive into the module

1 2 ... 56 57 58 59 60 61 62 63 64 65 66 ... 75 76

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Rockwell-automation 1734-485ASC POINT I/O ASCII User Manual Instrukcja Użytkownika Strona 61