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Cable and Connector Specifications..........................................................................A-3
Series 90 PLC Serial Port ..........................................................................................A-4
Workmaster Serial Port .............................................................................................A-6
IBM-AT/XT Serial Port.............................................................................................A-7
RS-232/RS-422 Converter.........................................................................................A-8
Description of the Isolated Repeater/Converter .............................................................A-10
Logic Diagram of the Isolated Repeater/Converter .........................................A-12
Pin Assignments for the Isolated Repeater/Converter .....................................A-13
System Configurations...................................................................................................A-14
Simple Multidrop Configuration......................................................................A-15
Complex Multidrop Configuration ..................................................................A-15
Rules for Using Repeater/Converters in Complex Networks ..........................A-15
Cable Diagrams..............................................................................................................A-16
Serial Cable Diagrams....................................................................................................A-19
RS-232 Point-to-Point Connections ........................................................................A-20
RS-422 Point-to-Point Connection..........................................................................A-22
Contents
x GFK-0529C
Figure 1-1. RS-232/RS-422 Point-to-Point Serial Connection to Series 90-70 PLC ....................................1-1
Figure 1-2. RS-232/RS-422