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Overview of Serial-Interface UPSes

If you have a UPS that communicates via serial port, you need to do two things before you can even think about configuring the software. First, you need to figure out whether it's a dumb (voltage-signalling) UPS or speaks the apcsmart protocol (see this discussion (see upstypes)). Second, if you have an interface cable from APC, you need to figure out what kind it is. If you don't have such a cable, you need to build one. A straight-through serial cable won't work (see crazy).

According to Bill Marr the Belkin F5U109, also sold as F5U409 also works with apcupsd for kernel versions 2.4.25 or higher and kernels 2.6.1 and higher. These newer kernels are needed to have the patch that makes the mct_u232 (Magic Control Technology) module and other adapters work with RS-232 devices that do not assert the CTS signal.



2009-03-11