1-3
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The NEMA4 housing option is for Portable Radios ONLY. For the 
NEMA4 housing specification refer to the Installation section. 
Backup
Battery
Portable
 
Radio 
NEMA4
 
Plastic 
Housing
I/O
Modules
CPU
Module
 
Grounding
Strip
Power
Supply
 
Module 
(More)
 
Main 
Power
 
Transformer
45 VA
 
Main
Power
 
Fuse 
 
Figure  1-4 NEMA4 Housing Style – Portable 
Figure  1-5 shows the External Radio Ready setup. This includes a multi-slot I/O card 
cage with 3 I/O plug-in modules, CPU Module, Power Supply Module, and the CMU 
Module (Mounted on the top of the I/O card-cage). 
 
Figure  1-5 External Radio Ready Setup