Installation Requirements
3–6 iSTAR eX Installation and Configuration Guide
iSTAR eX Input Power Rating
The iSTAR eX has the following input power ratings when using the internal 
power supply:
 100 - 240 VAC
 6.2 Amps
 60 Hertz
The iSTAR eX has the following input ratings when using an NPS external 
power supply:
 12 VDC
 6 Amps
Individual/Total Loads evaluated by UL
 RS-485 Reader Power Outputs: 10.6-12.5 VDC, 350 mA max each; total of 
RS485 reader outputs combined not to exceed 2.8 A.   
 Wiegand Reader Power Outputs: 10.6-12.5 VDC, 350 mA max each; total 
of Wiegand reader outputs combined not to exceed 1.4 A. 
 Total of all reader outputs combined (RS-485 & Wiegand) not to exceed 
2.8 A 
 Four (4) activated relay coils – GCM board = 100 mA 
 One I/8 module – 12 VDC, total= 125 mA 
 One R/8 module – 12 VDC, total= 325 mA (125 ma + 25 mA for each 
active relay (max 8)) 
 R/8 relay contact ratings – 30 VDC at 2A (resistive) 
 Max output load = eight (8) readers (2.8 A) + one (1) I-8 module (125 mA) 
+ one (1) R-8 module (325 mA) = 3.25 A