Remerciez-le!

Remerciez @Admin pour avoir partagé cet document gratuitement, de la manière la plus simple, en partageant sur les réseaux sociaux.

Ddc guide DDC-Online DDC Online DIRECT DIGITAL CONTROLS Getting Started An Overview of Direct Digital Controls Purpose of this Guide Due to the complexity and proprietary nature of DDC systems it ? s challenging to stay current with the designs installati

DDC-Online DDC Online DIRECT DIGITAL CONTROLS Getting Started An Overview of Direct Digital Controls Purpose of this Guide Due to the complexity and proprietary nature of DDC systems it ? s challenging to stay current with the designs installations operation and maintenance of DDC systems DDC- Online org was developed speci ?cally to help building owners and consulting specifying engineers with these issues Getting Started is a tool to help professionals make more informed decisions and increase their knowledge about direct digital controls Chapter Introduction to Direct Digital Control Systems In this chapter This chapter covers the basics of an Energy Management System ?? a fully functional control system Read this chapter Chapter Control Response In this chapter A review of ?ve control responses and of the main bene ?ts of DDC ??improved e ?ectiveness improved operation e ?ciency and increased energy e ?ciency Read this chapter Chapter Elements of a Direct Digital Control System In this chapter Included in this section data classi ?cation - type ow and source and characteristics of the software supporting DDC systems Read this chapter Input Output Tutorial Purpose of this Guide This portion of Getting Started provides descriptions of input and output devices written for someone new to the ?eld or a seasoned engineer Chapter Input Output I O Basics ddc-online org Getting-Started html C In this chapter DDC-Online This section provides terms and de ?nitions to help readers better understand material covered in next chapters Read this chapter Chapter Input Devices and Sensors In this chapter In the world of HVAC control there is basically one type of device used to complete a digital input DI circuit A switch employed in various forms is this device The following sections outline common switching devices currently used by the industry Read this chapter Chapter Output Devices In this chapter There are numerous analog devices used in the HVAC controls world Typically analog output devices are used to provide modulating control of valves dampers electric motors through variable speed drives and a wide variety of other devices The most common devices associated with analog outputs are sequencers variable speed drives silicon controlled recti ?ers and actuators The section also reviews the most common devices associated with digital outputs ??relays contactors starters and two-position actuators Read this chapter Supported by the Iow a Energy Center h ttp e n e rg y i a sta te e d u Copyright Iowa Energy Center ddc-online org Getting-Started html C