******************************  
*    hw_dcon_on_87kUnit      *
*                            * 
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    Commands for i-870xx I/O modules which are plugged in i-87K4/i-87K5/i-87K8/i-87K9 
 I/O expansion slots.
 
    Only i-870xx I/O modules can be plugged in i-87K4/i-87K5/i-87K8/i-87K9.

 
 
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*    hw_dcon_on_8KUnit       *
*                            *   
****************************** 

    Commands for i-80xx and i-870xx I/O modules which are plugged in i-8000 series main control unit. 
 
    i-80xx and i-870xx I/O modules use the same DCON Protocol when they are plugged 
    in i-8000 series main control unit.
    
    i-870xx I/O module uses different DCON protocol when plugged in 87K expansion unit and
    i-8000 main control unit.