A90 series Inverter User Guide 2.2 Overall and Installation Dimensions A90 inverters can be categorized into 23 models for 2 overall appearances and 10 installation dimensions (as shown in Figure 2–1 and Table 2–2). （ a ） Overall Dimensions of A90-4T1R5B~A90-4T045B （ b ） Overall Dimensions of A90-4T060~A90-4T304 72 62 24 Ш 3.5 4 56 98 85 73 Figure 2-1 A90 Series inverter and keypad dimensions （ c ） Dimensions of the detachable keypad (Option) 11