APC UPS control system specification

Q:Does apcupsd support Windows?

A:With release 3.8.0, apcupsd now runs on Win95/98, WinMe, WinNT, and Win2000 machines. All features of the Unix versions of apcupsd are implemented. The UPS EEPROM programming features of apcupsd have not been tested under Windows. Version 3.8.0 does not support simple signaling UPSes (BackUPS, etc). Version 3.8.1 does support most simple signaling UPSes, but not all cables (due to deﬁciencies in the Windows serial port API). Please note that we have had reports that apcupsd does not work properly on the WinXP system. If you have any information on this, please email us.

Q:I don’t have a cable, which one should I build?

A:First you must know if you have an apcsmart UPS or a voltage-signalling UPS. See the table of supported UPSes (see type table). If you have a apcsmart UPS, we recommend building a Custom Smart (see Smart-Custom Cable for SmartUPSes) cable. If you have a voltage- signaling UPS, we recommend that you build a Custom Simple (see

Voltage-Signalling Cable for ”dumb” UPSes) cable.

Q:How much CPU resources does apcupsd use?

A:Depending on your CPU speed, you may see more or less of the CPU consumed by apcupsd. On a 400MHz Unix system, the CPU usage should fall well below 0.1%. On slower systems, the percentage will in- crease proportionally to the decrease in the CPU speed. On a 400Mhz Win98 machine, the CPU usage will be on the order of 0.5-1.0%. This is higher than for Unix systems. However, compared to the 30% CPU usage by APC’s PowerChute (the version on the CDROM shipped with my UPS), apcupsd’s 0.5-1.0% is very modest.

If you conﬁgure apcupsd to run with pthreads (--with-pthreads on the ./configure line), apcupsd will run considerably faster, otherwise said, it will consume less of your CPU, and it will use approximately one third of the memory. For example, Carl Erhorn reports that on his Solaris system, “With the old 3-process version, we averaged about 4.8MB of total memory used. With the new single process, we use only about 1.7MB! That’s also a very good improvement.”

Q:What language is apcupsd written in?

A:It is written entirely in C.

Q:We are using apcupsd-3.8.1-1 in RedHat 6.2. The slave, when shutting down, is reporting an error at line 436 of apcupsd.c. The error is initiated by apcupsd --killpower! What can we do to ﬁx this, and is it critical?

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.

APC UPS control system manual

Models: UPS control system

UPS control system specifications