Communications, Collector to emitter, Pin assignment – Liebert PowerSure Personal User Manual
Page 7
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7
COMMUNICATIONS
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 (5-12 DC)
5
On Battery Mode Shutdown Return
6
Utility Fail / Normally On (open collector)
7
Low Battery (open emitter)
8
Utility Fail (common) (pins 6 & 9)
9
Utility Fail / Normally Off (open collector)
*Maximum voltage and current on pins 1, 6, 7, 8, 9 is 60V DC; 5.0 mA.
Collector to Emitter*
Open Collector
(+)
(-)
Open Emitter
Pin Assignment
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