Danfoss AK-LM 330 Design Manual

Also see for AK-LM 330: User guide

Contents

Danfoss AK-LM 330 Design Manual Manual pdf 28 page image

28 RS8FR302 © Danfoss 2015-08 AK-LM 330Preface to designBe aware of the following when the number of extension modulesis being planned. A signal may have to be changed, so that anadditional module may be avoided.• An ON/OFF signal can be received in two ways. Either as acontact signal on an analog input or as voltage on a low or high-voltage module.• An ON/OFF output signal can be given in two ways. Either witha relay switch or with solid state. The primary difference is thepermitted load and that the relay switch contains a cutoutswitch.Mentioned below is a number of functions and connectionsthat may have to be considered when a regulation has to beplanned. There are more functions in the controller than the onesmentioned here, but those mentioned have been included inorder that the need for connections can be established.FunctionsClock functionClock function and change-over between summer time andwinter time are contained in the controller.The clock is zeroset when there is power failure.The clock’s setting is maintained if the controller is linked up in anetwork with a gateway, a system manager or a clock module canbe mounted in the controller.Start/stop of regulationRegulation can be started and stopped via the software.Alarm functionIf the alarm is to be sent to a signal transmitter, a relay output willhave to be used.Forced controlThe software contains a forced control option. If an extensionmodule with relay outputs is used, the module’s top part canbe with change-over switches – switches that can override theindividual relays into either OFF or ON position.Data communicationThe controller module has terminals for LON data communication.The requirements to the installation are described in a separatedocument. Literature no. RC8AC.