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COMMUNICATIONS
You can use SiteNet® MultiLink™ to allow your UPS to communicate to your
computer via your DB-9 communications port. Download MultiLink from our web
site at www.liebert.com.
The PowerSure™ Personal UPS contains a standard DB-9 receptacle located on the rear of
the UPS unit. Several signals are provided on this port and are assigned as follows:
PIN
ASSIGNMENT DESCRIPTION
1
Low Battery (open collector)
2
No connection
3
No connection
4
On Battery Mode Shutdown (5-12V DC)
5
On Battery Mode Shutdown Return
6
Mains Fail / Normally On (open collector)
7
Low Battery (open emitter)
8
Mains Fail (common) (pins 6 & 9)
9
Mains Fail / Normally Off (open collector)
Pin Assignment
*Maximum voltage and current on pins 1, 6, 7, 8, 9 is 60V DC; 5.0 mA.
Collector to Emitter*
O pe n C o llector
(+ )
(-)
O pe n E m itter
9
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