---
name: "al175"
section: "8"
platform: "linux"
package: "nut"
version: "2.8.5-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/al175"
---

# al175(8)

Driver for Eltek UPS models with AL175 alarm module

## NAME

al175 - Driver for Eltek UPS models with AL175 alarm module

## SYNOPSIS

**al175** -h

**al175** -a *UPS\_NAME* \[*OPTIONS*\]

**Note**\

This man page only documents the hardware-specific features of the **al175** driver. For information about the core driver, see [**nutupsdrv**(8)](/nutupsdrv/8.md).

## SUPPORTED HARDWARE

The **al175** driver is known to work with the following UPSes:

• Eltek MPSU4000 with AL175 alarm module

It may also work with other UPSes equipped with AL175 alarm module, but they have not been tested.

AL175 have to be configured to operate in COMLI mode. See documentation supplied with your hardware on how to do it.

## EXTRA ARGUMENTS

This driver does not support any extra settings in the [**ups.conf**(5)](/ups.conf/5.md).

## INSTANT COMMANDS

This driver supports some extra commands (see [**upscmd**(8)](/upscmd/8.md)):

**test.battery.start**

Start a battery test.

**test.battery.stop**

Stop a battery test.

## VARIABLES

Besides status, this driver reads UPS state into following variables:

• **ups.test.result**

• **output.voltage.nominal**

• **output.current**

• **battery.voltage.nominal**

• **battery.current**

• **battery.temperature**

• **input.transfer.boost.low**

## KNOWN ISSUES AND BUGS

• Shutdown is not supported. FIXME

• The driver was reworked to meet the project code quality criteria, without testing on real hardware. Some bugs may have crept in.

## AUTHOR

Kirill Smelkov \<kirr@mns.spb.ru\>

## SEE ALSO

### The core driver:

[**nutupsdrv**(8)](/nutupsdrv/8.md)

### Internet resources:

The NUT (Network UPS Tools) home page: https://www.networkupstools.org/historic/v2.8.5/