Panasonic FP7 Series User Manual page 132

Specifications
 When no power supply unit is used
FP7 system full width
= CPU unit + n devices (input/output units and intelligent units) + End unit
= 40mm + (n x 28mm) + 14.5mm
= 54.5mm + (n x 28mm)
Note) The size of the CPU unit is 6mm shorter when using CPS21.
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