Specifications
15
3. Connect a power supply of the desired voltage (12V or 24V) to the iSTAR
Edge.
4. Watch the LCD for the message to reset the board.
5. Select position 0 (or other desired position other than 9).
6. Press RESET button.
The iSTAR Edge Wiegand reader power, RS-485 serial port power and AUX
power are always configured at 12 VDC.
The Relay Wetted power is either 12 VDC or 24 VDC, depending on the input
power source.
Onboard backup
batteries
iSTAR Edge uses four onboard AA batteries to power backup to flash on loss of
main input power. These batteries must be non-rechargeable Alkaline batteries,
specifically:
AA
Alkaline
2.5 Amp hour
Button top
In order to prevent voltages that partially run the processor, the iSTAR Edge has
a battery-cut circuit. When the batteries fall below 4V, they are disconnected
from rest of the board.
The user has an onboard battery low input, configured in the host, that will
indicate when the onboard batteries need to be changed. This input will be
active when batteries are not present, not making contact, or too low to
guarantee a backup and three days of power for the clock. The user should
replace the batteries immediately when this input is active.
Backup
iSTAR Edge handles backup in essentially the same way as iSTAR Classic and
iSTAR eX. When power (input voltage) drops too low to support full operation,
power usage is reduced as much as possible, processes are stopped and data is
written into flash. Processes remain stopped until the input voltage returns to a
normal operating range. At that point, iSTAR Edge reboots and reloads data
from flash to RAM and starts processing again.
The only input that controls the initiation of iSTAR Edge’s power-fail backup
process is iSTAR Edge's own onboard measurement of incoming power
voltage. iSTAR Edge measures external power voltage every 1/10 of a second.
When external power voltage moves outside of normal operating voltage (10.2
V to 14.4 V for nominal 12 V operation, or below 20.4 V for nominal 24 V
operation), iSTAR Edge will initiate the backup process.
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