38 Operation principle and hardware description Auxiliary control cubicle (ACU) layoutA layout example of the auxiliary control cubicle (ACU) is shown below.1 Fuse-disconnectors F101. On the primary oftransformer T101 (item 27).19 Lead-through for control cables2 Fuse-disconnectors F27 for motor cooling fanoutputs (options +M602…610)20 Terminal block X68 for FSO-xx safety functionsmodule (option +Q973)3 Supply control unit [A51]. See chapter Controlunits of the drive (page 131)21 I/O terminal block (option +L504). The I/O of theinverter control unit is wired to this block.4 Inverter control unit [A41]. Three optional I/Oextension, encoder interface, or fieldbusadapter modules can be installed on the unit.Additional modules are installed on item 13.See chapter Control units of the drive (page131)22 Grounding/clamping point for control cables5 Auxiliary voltage circuit breaker F112. On thesecondary of transformer T111 (item 29).Mounted on the right-hand inside wall.23 24 V DC power supply and buffer moduleSwing-out frame closed,detachable mounting plates in placeSwing-out frame open,without detachable mounting plates324 51891011121314 15 1617 181920 21222324252526272830313233293496357
