LED Connections
4–34 iSTAR eX Installation and Configuration Guide
NPS Version (External Power Supply)
The PMB has three digital input lines on J16 for use with an external power
supply. To set up an external power supply device, connect the C and NC
outputs from the external power supply relay to J16 on the PMB.
Each signal has two wires. Connect one wire to the input (In 1-3) and the other
wire to the GND pin. The three inputs are Normally Closed and will assert
when the input opens.
The PMB (J16) digital input lines indicate the following to the host computer:
AC Power Fail (Switch to battery backup power and notify host)
Low Battery (Notify host)
Backup Now (Battery is almost depleted - backup now)
An external power supply used to power this system must provide an AC Fail
and Low Battery output signal. Connect the AC Fail to the AC Fail and the
Low Battery to Low Battery.
Table 4.3 shows the J16 Connections for use with an external power supply.
NOTE
Use of the Backup Now signal with NPS has not been evaluated by UL.
Table 4.3: External Power Supply (J16) Connections
J16 Pinouts Description
In 1 AC Power Fail
In 2 Battery Low
In 3 Backup Now
GND Common point for In and Out signals
Out 1 Low when main battery is low.
Out 2 Low when main power supply fails.
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