Power Management Board (PMB)
iSTAR eX Installation and Configuration Guide 1–15
PMB Component Description
The iSTAR eX PMB contains these major components:
 RM Reader connectors – RS-485 Reader Busses (4 ports)
 COM1, COM2 – RS-485 reader connectors to the GCM
 Multiplex switch (S1) – used to connect RS-485 readers to either COM1 or 
COM2. Read1 and Read2 connect to COM1 and Read3 and Read4 connect 
to COM2, by default.
 LEDs – indicators for power and system status of communications and 
RM reader bus communications
 External Power Supply– two outputs and three inputs for external power 
Supply.
 Debug Port – for use by Software House technical support
 Serial Peripheral Interface (SPI) – a synchronous serial data link that 
provides communication between the iSTAR eX GCM and the PMB
 Battery – connector to 12 VDC, 17.2 Ah minimum capacity standby 
battery
 PMB to ESD – battery charging connector
 ESD power – UL Recognized ESD, Model SPS-6.5, supplies power to the 
PMB
 iSTAR eX GCM – power
 S5 – Reset Switch (Software House use only)—Use the iSTAR eX GCM 
reset (SW2) to reset the iSTAR eX
 Fuse – 10 A, 250 VAC fuse
NOTE
The two outputs have not been evaluated by UL.
NOTE
The ESD power supply, battery charging connector, and 17.2Ah standby 
battery are not present in NPS configuration of the iSTAR eX.