Danfoss AK-LM 330 Design Guide

24 RS8FR302 © Danfoss 2015-08 AK-LM 330
Extension module AK-OB 101A
Function
The module is a real time clock module with battery backup.
The module can be used in controllers that are not linked up in
a data communication unit together with other controllers. The
module is used here if the controller needs battery backup for the
following functions
• Clock function
• Fixed times for day/night change-over
• Fixed defrost times
• Saving of alarm log in case of power failure
• Saving of temperature log in case of power failure
Connection
The module is provided with plug connection.
Placing
The module is placed on the PC board inside the top part.
Point
No point for a clock module to be dened – just connect it.
Working life of the battery
The working life of the battery is several years – even if there are
frequent power failures.
An alarm is generated when the battery has to be replaced.
After the alarm there are still several months of operating hours
left in the battery.

Danfoss AK-LM 330 Specifications

General

Brand	Danfoss
Model	AK-LM 330
Category	Measuring Instruments
Language	English