1-3
 
 
The 4010 Base System includes the SFI/O card, power supply, and cabinet. 
 
The SFI/O contains all connections for optional modules as well as N2 
annunciator communication, IDNet, NAC, Auxiliary Power, Auxiliary Relay, PC 
Programmer (service port), and expansion power connections.   
 
The User Interface provides a 2x40 LCD screen, LEDs, operational and 
programming keys, all of which are visible with the cabinet door closed.  See 
“User Interface,” later in this chapter for additional information about the user 
interface. 
 
TB6 TB7
TB1
TB3 TB4
P13
TB2
P14
TB8TB5
 
 
Figure 1-1.  4010 SFI/O with User Interface 
 
Continued on next page 
Base System Module 
Overview 
SFI/O 
Overview 
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