3-1
CHAPTER 3  
In-box Modules 
3.1  Power Supply Module 
3.1.1  Power Supply Versions 
The following versions of the Power Supply Modules exist: 
1.  Less (FPN5957) – Used with Mobile Radios 
2.  More (FPN5555) – Used with Portable Radios 
The Less Power Supply Module is used with the following power sources: 
1.  External +12 to +16 VDC Power Supply or Solar Panel 
2.  8 Ampere Power Supply 
The More Power Supply Module is used with the following power sources: 
3.  45 VA Main Power Transformer 
3.1.2  Powering the Module 
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The input and output circuits of the Power Supply Module are 
protected by on-board fuses. 
External +12 to +16 VDC Power Supply or Solar Panel 
To power-on the IRRInet-XL RTU use power cable (p/n FKN4469A). Connect this power 
cable directly from the external source to the “PWR IN” of the Power Supply Module.
 
8 Ampere Power Supply 
To power-on the IRRInet-XL RTU turn the “DC OUT” Switch on the front panel of the 8 
Ampere Power Supply to the ON position.
 
45 VA Power Transformer 
To power-on the IRRInet-XL RTU turn the “DC” switch on the front panel of the Power 
Supply Module to the ON position.