richcomm_usb - Driver UPS equipment using Richcomm dry-contact to USB solution
This man page only documents the specific features of the richcomm_usb driver.
For information about the core driver, see nutupsdrv
The Richcomm dry-contact to USB solution is a generic interface that is used to
upgrade an existing (RS-232) contact closure UPS interface to USB. As such,
all the limitations of the underlying contact closure interface apply. This
means that you will only get the essentials in ups.status: OL, OB, and LB. See
Most contact-closure UPSes will not power down the load if the line power is
present. This can create a race when using slave upsmon
(8) systems. See
(8) man page for more information.
The solution to both of these problems is to upgrade to a smart protocol UPS of
some kind that allows detection and proper load cycling on command.
Peter van Valderen <p.v.valderen at probu.nl>, Dirk Teurlings <dirk at
The NUT (Network UPS Tools) home page: http://www.networkupstools.org/