3.7” 
6.9” [175 mm] [94 mm]
max. 1
6.3” [160 mm]
3.1” 
[76 mm]
max. 1
7.4” [188 mm]
Notes:
1.Dimensions shown are for units with the MSR/Smart Card option
installed. Subtract .08” | .25” [6 mm] | 1.8” [46 mm] |
[2 mm] from these dimensions for units without this option.
Figure 25: RW 420 Overall Dimensions
53
RW 420 User Guide