Note that you should enter “/dev/usb/hiddev[0-15]” literally as shown. The “[0-15]” expression tells apcupsd to search all hiddev devices until it finds a UPS. You can restrict the search to a subset of devices by using something like “[0-4]”, but keep in mind this will limit apcupsd’s ability to locate the UPS if the kernel relocates it to a different device node, which happens oc- casionally during short power failures. Again, it is highly recommended to leave the DEVICE directive blank and let apcupsd find your device auto- matically.

If the first time you execute apcupsd, you get a message to the effect that the Apcupsd USB driver is missing, it means that you most likely forgot to put —enable-usb on your ./configure command line. If you loaded apcupsd from an rpm file, you may have selected the wrong one — please ensure that the word usb appears in the rpm package name.

The next chapter (see Configuration Examples) of this manual provides you with the essential characteristics of each main type of configuration file. After those elements are correct, apcupsd should run, and then it is only a matter of customization of your setup.

Arranging for Reboot on Power-Up

The final consideration for a automatic reboot after a full power down is to ensure that your computer will automatically reboot when the power is restored.

This is not the normal behavior of most computers as shipped from the factory. Normally after the power is cut and restored, you must explicitly press a button for the power to actually be turned on. You can test your computer by powering it down; shutting off the power (pull the plug); then plugging the cord back in. If your computer immediately starts up, good. There is nothing more to do.

If your computer does not start up, manually turn on the power (by pressing the power on button) and enter your computer’s SETUP program (often by pressing DEL during the power up sequence; sometimes by pressing F10). You must then find and change the appropriate configuration parameter to permit instant power on.

Normally, this is located under the BOOT menu item, and will be called something such as Restore on AC/Power Loss or Full-On. The exact words will vary according to the ROM BIOS provider. Generally you will have three options: Last State, Power On, and Power Off. Although Last State should normally work, we recommend setting your computers

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APC UPS control system manual Arranging for Reboot on Power-Up
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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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