HP PowerWise series (L600, L900 and L1250) Communications port
Communications Port Overview
The HP PowerWise L600, L900 and L1250 are equipped with a standard communication
port (DB9 connector) located at the rear of the unit. The communication
The unit's operating status in a discrete form (contact closures)
The information set is extensive and offers connectivity with all major
network and computer platforms.
- Information such as:
- On AC power operation.
- Low battery pre-alarm.
- Battery mode operation.
- Remote shutdown.
The following power management software is available to control your
HP Power Wise L600/L900/L1250. Each of these software kits include the
appropriate cable for your operating system:
For information about installing and using this software, refer to the
operating manual included with the particular software package that you
HP Power Wise Assistant for Novell Netware
HP Power Wise Assistant for IBM OS/2 LANServer
HP Power Wise Assistant for Microsoft Windows NT
HP Power Wise Assistant for Novell, UnixWare, SC0 UNIX
HP Power Wise Assistant for HP-UX, IBM AIX, Sun Solaris
Numbering of pins
Contact closure group
Pin 9: Ac Line Fail Contact (normally open): an output line connected to
a set of relay contacts that closes when the AC Line Fails and the UPS
is operating in battery mode. This shorts the output pin to pin 5 (Contact
Pin 4: Ac Line Fall Contact (normally closed): an output line connected
to a set of relay contacts that open when the Ac Line Fails and the UPS
is operating in battery mode. This opens the connection between the output
pin and pin 5. (Contact Closure Common)
Pin 7: Low Battery Contact (normally open): an output line connected to
a set of relay contacts that closes when the remaining battery time drops
below the under-defined limit. This connects the output pin to pin 5 (Contact
Pin 5: Contact Closure Common: signal common for the Contact Closure Group
RS232 serial communications group
Pin 3: RS232 Receive Input: the serial communications input line
Pin 2: RS232 Transmit Output: the serial communications output line
Pin 5. RS232 Common
RS232 level group
Pin 3: Shutdown Input: an RS232 input that shuts down the UPS if it is
held high for 200 milliseconds (a break signal) while the UPS is operating
in battery mode.
Pin 1: Signal Common for all RS232 port signals (earth ground referenced).