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Appendix C

C-3

Table C.B provides the pin assignments for the 25-pin COMM1,

COMM2, and COMM3 (/t1, /t2, /t3) ports on the main and serial

expander modules.

Table C.B

Pin Assignments for 25ĆPin COMM1, COMM2, and COMM3 Ports

Pin RSĆ232C RSĆ422A RSĆ423 RSĆ485



   

    

    

    

    

    

    

    

    

   ′    

    

    

   ′    

   ′    

    

   ′    

    

    

   ′    

    

    

   ′    

   ′    

    

    

Connecting to the 25ĆPin

COMM1, 2, and 3 Ports