LIEBERT-ESP2(8)                   NUT Manual                   LIEBERT-ESP2(8)

NAME
       liebert-esp2 - Driver for Liebert UPS, using the ESP-II serial protocol

NOTE
       This man page only documents the hardware-specific features of the
       liebert-esp2 driver. For information about the core driver, see
       nutupsdrv(8).

SPECIAL CABLING NOTE
       Be aware that an RS-232 cable with ONLY the RX, TX and ground pin must
       be used when interfacing with GXT2 series UPS units (and possibly
       others), since the handshaking lines are used for purposes other than
       RS-232 flow control.

       Use of a standard RS-232 cable with full handshaking may result in
       undesired operation and/or shutdown. It is therefore advisable to
       confirm the proper cable/wiring with the diagram provided in the manual
       with your UPS.

SUPPORTED HARDWARE
       Tested to work on the following units:

       o   Liebert GXT2-6000RT208

       This is an experimental driver. You have been warned.

       This driver currently does not support modification of configuration
       parameters, such as the low battery warning time and automatic restart
       policy.

EXTRA ARGUMENTS
       This driver supports the following optional settings in ups.conf(5):

       baudrate=num
           Set the speed of the serial connection - 1200, 2400 (default),
           4800, 9600 or 19200.

AUTHORS
       o   Richard Gregory <R.Gregory at liverpool.ac.uk>

       o   Arjen de Korte <adkorte-guest at alioth.debian.org>

       o   Nash Kaminski <nashkaminski at kaminski.io>

SEE ALSO
   The core driver:
       nutupsdrv(8)

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

Network UPS Tools 2.8.1           04/06/2024                   LIEBERT-ESP2(8)