Liebert AC4 Manuel d'utilisateur

MONITORINGAC4 USER MANUAL

Introduction41.6 Controller Board OverviewThe AC4’s controller board has connectors for four digital inputs and four digital outputs, as shown below.

Introduction5I - Digital output loss-of-power jumperOne of four output jumpers. Each digital output has a jumper to set the fail-safe position of the

Introduction61.7 LED IndicatorsThe AC4’s controller board has LED indicators that show the status of inputs, outputs and the com-mon alarmTable 2 LED

Introduction71.8 Typical SequenceFigure 4 shows a typical sequence of how the AC4 functions after detecting a change in a monitored device. Many respo

Installation82.0 INSTALLATION2.1 Installation ConsiderationsThe AC4 must be installed indoors and may be mounted on the surface of a wall or flush-mou

iTABLE OF CONTENTS1.0 INTRODUCTION1.1 Methods of Viewing and Configuring the AC4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ii6.0 SILENCE ALARM & BACKUP LOG FILES (SERVICE TERMINAL INTERFACE)6.1 Silence Alarm (Service Terminal Interface) . . . . . . . . . . . . . . . .

iiiAPPENDIX A-SERVICE TERMINAL INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49A.1 Comparison of Functions: L

ivFIGURESFigure 1 AC4 enclosure—external features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Introduction11.0 INTRODUCTIONThe Liebert AC4 is ideal for coordinated control of systems with redundant equipment, such as multiple environmental unit

Introduction21.4 Outside Enclosure OverviewThe AC4’s controller board comes in an enclosure that is 2-3/4" deep and has a built-in liquid crystal

Introduction31.5 Typical ConfigurationFigure 3 shows an example of external devices connected to the AC4’s controller board. There may be up to four d