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LIEBERT(8)			  NUT Manual			    LIEBERT(8)

NAME
       liebert - Driver	for Liebert contact-closure UPS	equipment

SYNOPSIS
       liebert -h

       liebert -a UPS_NAME [OPTIONS]

	   Note

	   This	man page only documents	the hardware-specific features of the
	   liebert driver. For information about the core driver, see
	   nutupsdrv(8).

SUPPORTED HARDWARE
       This driver supports some Liebert UPS equipment with a contact-closure
       interface. This includes	the UPStation GXT2 with	their contact-closure
       cable.

       The smart mode ("Multilink") cable is NOT supported by this driver.

EXTRA ARGUMENTS
       This driver does	not support any	extra settings in the ups.conf(5).

BUGS
       This driver does	not yet	support	shutdowns by raising DTR. Be aware
       that shutdowns are not possible with the	stock contact-closure cable.
       You may have to build another cable with	DTR connected through to the
       UPS for it to work.

       There is	no way for this	driver to detect the hardware or cable.	It
       will start up successfully even if no UPS is present. This is a
       fundamental limitation of any contact-closure driver.

SEE ALSO
   The core driver:
       nutupsdrv(8)

   Internet resources:
       The NUT (Network	UPS Tools) home	page: https://www.networkupstools.org/

Network	UPS Tools 2.8.2.	  04/17/2025			    LIEBERT(8)

Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=liebert&sektion=8&manpath=FreeBSD+Ports+14.3.quarterly>

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