SLAVE directives be put in your /etc/hosts file so that apcupsd will be able to resolve the machine name during startup and shutdown even if DNS is not running. Alternatively, you can use IP addresses on the MASTER and SLAVE directives, but this is less flexible.

USERMAGIC < user defined magic> used only in SLAVE config- uration files. The USERMAGIC directive is a sort of password that gives a second level of identification security in a slave configuration file. It is a character string up to 17 characters in length. It should be unique for each slave. When the slave makes initial contact with the master, this string is passed to the master. Then on each transmission from the master to the slave, the string is passed back to the slave, which checks that it is the correct string before accepting the master’s information. This string should be different for each and every slave on the network. This directive is not required.

Configuration Directives Used to Set the UPS EPROM

NOTE. THESE ARE DEPRECIATED AND NO LONGER WORK IN APCUPSD PLEASE USE APCTEST

The values specified with the following directives are only used if the --configure option is specified on the apcupsd command line, and the UPS is capable of internal EPROM programming. In that case, apcupsd attempts to set the values into the UPSes EPROM.

Under normal operations, the values for these parameters specified in the configuration file are not used. Instead, they are read from the UPS EPROM by apcupsd. See Configuration Directives Used to Set the UPS EPROM of this manual for further details before attempting to reprogram your EEP- ROM.

SENSITIVITY <sets sensitivity level> (H)igh, (M)edium, (L)ow

This value determine how sensitive the UPS is to the mains quality and voltage fluctuations. The more sensitive it is, the quicker the UPS will switch to battery power when the mains line quality is bad. Normally, this should be set to H, but if you find your UPS switching to batteries frequently, you might want to try a less sensitive setting, providing that your computer equipment tolerates the poor quality mains. This value is written to the UPS EPROM when the configure option is specified.

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APC UPS control system manual Configuration Directives Used to Set the UPS Eprom
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UPS control system specifications

APC UPS (Uninterruptible Power Supply) control systems are vital components for ensuring uninterrupted power supply and protecting critical equipment from power interruptions, surges, or fluctuations. Designed by Schneider Electric, APC UPS systems are renowned for their high quality and reliability. They utilize advanced technologies and features to suit diverse applications, from home offices to large industrial settings.

One of the main features of APC UPS systems is the ability to provide backup power during outages. This is achieved through a battery system that activates immediately when the mains power fails. This seamless transition minimizes downtime and ensures that electronic devices continue to operate, protecting data integrity and equipment lifespan.

Another significant characteristic of APC UPS systems is their intelligent management capabilities. Most models come with PowerChute software, which provides users with real-time monitoring of power conditions and the status of the UPS. This software allows for graceful shutdowns of connected devices during extended outages, thereby preventing data loss and damage to devices.

APC UPS systems also incorporate advanced technologies such as Automatic Voltage Regulation (AVR). AVR technology ensures that the output voltage remains stable by correcting minor fluctuations without switching to battery mode. This not only prolongs the battery life but also provides a consistent power supply to the connected equipment.

Thermal management is another critical aspect of APC UPS control systems. The design often includes efficient cooling systems that prevent overheating, ensuring optimal performance and longevity of the unit. Some models feature EcoMode, which reduces energy consumption and lowers operational costs by working at high efficiency only when battery backup is not required.

APC UPS systems are designed with scalability in mind. Users can easily add more batteries or connect additional UPS units to accommodate growing power needs. Features such as hot-swappable batteries and modular design facilitate easy upgrades and servicing without interrupting power supply.

In terms of connectivity, APC UPS products often feature multiple options including USB, RS-232, and network management capabilities. This enables users to connect remote management tools and integrate the UPS with existing IT infrastructure.

In summary, APC UPS control systems deliver reliability, efficiency, and advanced technology features that cater to a wide array of power protection needs, making them a trusted choice for individuals and businesses alike.
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