M&I – AC 900F Controller 83
 
Section 6  Wiring
This section provides information on wiring the AC 900F controller exclusive of the 
CI/CM communication interface module. It contains safety instructions, general 
guidelines and information on cable routing.
Safety instructions
The L+ and M terminals are assigned twice. Incorrect wiring may cause short 
circuits and damage the power supply unit or the fuse protection of the power supply 
unit. If no suitable protection is provided (suitable module), the CPU module may 
be damaged as well. For this reason, the CPU module must be wired in compliance 
with the following instructions and an adequately dimensioned fuse must be used. 
General instructions
Strictly observe the following basic principles and instructions when installing and 
wiring the controller. 
Make sure to strictly observe the following safety instructions when wiring the 
controller. This requirement is essential to exclude personal injury and equipment 
damage.
Please refer to the safety instructions for the AC 700F/AC 900F for general 
information on safety and precautionary measures. 
The specified earthing and shielding measures must be implemented in order to 
ensure reliable controller operation.