4.1.8  

Loading the System Software and Installing Subboards on the CBSAP 
 
Caution  
Always wear an antistatic wristband when working on the system (especially when handling boards). Connect the wristband to the slide-in shelf in the cabinet using the alligator clip.  
The boards should be installed in the cabinets as described in Section 4.1.5 "Installing Boards (Configuration Notes)".
The central control boards are not always fully equipped when delivered. Optional plug-in boards are packaged individually.
See Section 3.2.3 "CBSAP" for information on slots for subboards on the central control board CBSAP.
Caution  
Place the central control board on a flat surface before installing subboards.  
The spacing bolts supplied guarantee the correct insertion of the subboard, so you should always mount them (see Figure 3-7).  
Otherwise you may damage the board.