Emerson AC4 User Manual

Infrastructure Management & Monitoring

For Business-Critical Continuity™

Liebert® AC4™

User Manual

TABLE OF CONTENTS

1.0INTRODUCTION

1.1 Methods of Viewing and Configuring the Liebert AC4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.2 Data Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.3 Available Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.4 Outside Enclosure Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.5 Typical Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.6 Controller Board Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.7 LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.8 Typical Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.0INSTALLATION

2.1 Installation Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.1.1 Unpacking and Preliminary Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.2 Surface-Mounting the Liebert AC4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.2.1 Mounting the Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.3 Flush-Mounting the Liebert AC4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.3.1 Mounting the Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.4 Connect Power to the Liebert AC4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.0WIRING AND CONNECTIONS

3.1 Wiring Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.2 Connecting Digital Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.2.1 Connecting Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.2.2 Connecting Digital Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.2.3 Setting the Digital Output Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.3 Connecting Common Alarm Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.4 RS232 Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.0OVERVIEW OF MENUS

4.1 Opening Screen Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.2 Main Menu Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.3 LCD Menu Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.0VIEW STATUS OPTIONS

5.1 View Active Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.1.1 Active Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.2 View Alarm Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5.2.1 Alarm Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.2.2 Backing Up the Alarm Log (Service Terminal Interface only) . . . . . . . . . . . . . . . . . . . . . . . . . 20

5.3 View Event Log. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.3.1 Event Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 5.3.2 Backing Up the Event Log (Service Terminal Interface only) . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.4 View Input Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

5.4.1 Input Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

5.5 View Output Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

5.5.1 Output Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

i

6.0SILENCE ALARM & BACKUP LOG FILES (SERVICE TERMINAL INTERFACE)

6.1 Silence Alarm (Service Terminal Interface) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 6.2 Back Up Log Files (Service Terminal Interface only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

7.0SYSTEM AND CONTROL OPTIONS

7.1 Login . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 7.2 Setup System - Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 7.3 Setup System - Setup Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

7.3.1 Change Label (Name of Input) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 7.3.2 Define Input as Normally Open or Normally Closed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 7.3.3 Define Input as Alarmable or Event . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 7.3.4 Set Up Alarmable Inputs in Latched or Unlatched Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 7.3.5 Set Up Delay Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

7.4 Setup System - Setup Common Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 7.5 Setup System - Setup Zones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

7.5.1 Set Up a Zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

7.6 Setup System - Setup Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

7.6.1 Define Output as Normally Open or Normally Closed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 7.6.2 Define Operating or Standby Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 7.6.3 Enable or Disable an Output Device in Alarm Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 7.6.4 Configure Output for Loss of Power (“Fail-Safe”). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

7.7 Setup System - Setup System Info . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

7.7.1 Change Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 7.7.2 Set Date & Time/Automatic Daylight Saving Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 7.7.3 Setup Site ID. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 7.7.4 Backup and Upload Configuration File (Service Terminal Interface only) . . . . . . . . . . . . . . . 38 7.7.5 Factory Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 7.7.6 Perform Firmware Update (Service Terminal Interface only) . . . . . . . . . . . . . . . . . . . . . . . . . 41

7.8 Setup Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

7.8.1 Turn Automatic Sequencing On or Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 7.8.2 Turn Standby Testing On or Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 7.8.3 Specify Failed Standby Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 7.8.4 Specify Hold Delay Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 7.8.5 Specify Restart Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

7.9 Override Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 7.10 Clear Alarms & Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

7.10.1 Clear Active Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 7.10.2 Clear the Alarm Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 7.10.3 Clear the Event Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

8.0SPECIFICATIONS

8.1 Liebert AC4 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

ii

APPENDIX A - SERVICE TERMINAL INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

A.1 Comparison of Functions: LCD and Service Terminal Interface. . . . . . . . . . . . . . . . . . . . . . 51 A.2 Connecting to the Service Terminal Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

A.2.1 Create a Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 A.2.2 Connect to the Service Terminal Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

A.3 Overview of Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

A.3.1 View Status Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 A.3.2 Silence Alarm and Backup Log Files. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 A.3.3 Setup Menu Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

A.4 View Status Menus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

A.4.1 View Active Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 A.4.2 View Alarm Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 A.4.3 View Event Log. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 A.4.4 View Input Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 A.4.5 View Output Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

A.5 Silence Alarm & Back Up Log Files (Service Terminal Interface only). . . . . . . . . . . . . . . . . 61

A.5.1 Silence Alarm (Service Terminal Interface only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 A.5.2 Back Up Log Files (Service Terminal Interface only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

A.6 Setup Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

A.6.1 Setup Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 A.6.2 Setup Common Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 A.6.3 Setup Zones. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 A.6.4 Setup Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 A.6.5 Setup System Info. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 A.6.6 Setup Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 A.6.7 Override Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 A.6.8 Clear Alarms & Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

iii

FIGURES

Figure 1 Liebert AC4 enclosure—external features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Figure 2 Liebert AC4 enclosure—internal features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Figure 3 Typical Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Figure 4 Example of typical sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 5 Mounting dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 6 Electrical connections to panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Figure 7 LCD Menu overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Figure 8 Menu overview - View Status menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 9 Menu overview - System and Control menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

TABLES

Table 1 Controller board components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Table 2 LED indicators summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 3 Packing manifest. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Table 4 Wiring specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Table 5 Digital output jumper settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Table 6 Guide to Liebert AC4 functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Table 7 Primary Functions Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Table 8 Alarm log conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Table 9 Event log conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Table 10 Digital input states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Table 11 Digital output states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Table 12 Valid characters for data entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Table 13 Default settings - digital inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Table 14 Input and output labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Table 15 Default zones. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Table 16 Possible combinations - outputs per zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Table 17 Default settings - digital outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Table 18 Default settings - operation features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Table 19 Failed Standby response. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Table 20 Automatic / manual control - output points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Table 21 Guide to Liebert AC4 functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

iv

Introduction

1.0INTRODUCTION

The Liebert AC4 is ideal for coordinated control of systems with redundant equipment, such as multiple environmental units or pumps. When the Liebert AC4 controller detects an alarm in an operating device, the Liebert AC4 enables a standby device and controls the device in alarm as configured, either leaving that device operating or disabling it.

The Liebert AC4 controller can also balance usage of devices by rotating units through Operating and Standby modes according to a user-defined schedule. This helps keep redundant equipment operating efficiently and only when needed. The Liebert AC4 can perform routine testing of standby devices and alert personnel if a standby device fails an operating test and requires attention.

Another capability of the Liebert AC4 is monitoring the status of connected devices and keeping personnel apprised through local alarming.

The Liebert AC4 controller can interface with anything that closes an electrical contact. To improve process efficiency and troubleshooting, the controller tracks data in two types of logs: alarm and event. The Liebert AC4 has a local LCD interface and an RS232 interface.

When an alarm condition arises, the Liebert AC4 displays alarm information, sounds an audible alarm, changes the state of the common alarm relay and turns connected devices on or off according to user configuration. See 1.5 Typical Configuration for a more detailed example.

1.1Methods of Viewing and Configuring the Liebert AC4

The Liebert AC4 features access through two interfaces that allow users to configure the unit, silence alarms, back up logs, and perform many other functions to keep a large or small operation running smoothly and safely.

•LCD—liquid crystal display on the front of the panel

•Service Terminal Interface—accessible via a computer connected directly to an RS232 port

These interfaces permit easy access and configuration of the Liebert AC4, allowing users to view data, silence alarms and have full access to information stored in the controller, including logs of alarms and events.

1.2Data Logs

The two types of data logs—alarm history and event history—can be viewed on the LCD on the front of the Liebert AC4 or the Service Terminal Interface. The logs may also be downloaded to a computer through the Service Terminal Interface.

1.3Available Alarms

The alarms available with the Liebert AC4 are:

•Discrete input alarm (for each digital input)

•Loss of power

•No standby available

•Standby device failed

•No restart available

1	Liebert® AC4™

Introduction

1.4Outside Enclosure Overview

The Liebert AC4 controller board comes in an enclosure that is 2-3/4" deep and has a built-in liquid crystal display (LCD) and a key lock, as shown in Figure 1. The enclosure is made of metal to accommodate secure conduit fittings and protect components against environmental debris.

Figure 1 Liebert AC4 enclosure—external features

							LCD for configuration
							and operation
The enclosure
has knockouts
and access slots
on top and							Key lock
bottom for
cables and wires.

The enclosure must be secured to a wall, either flush-mounted or recessed in the wall, as described in 2.0 Installation. Knockouts and access slots on the top and bottom allow easy connection of wires and cables (see 3.0 Wiring and Connections) with either mounting type.

Figure 2 Liebert AC4 enclosure—internal features

Back of LCD

Controller Board

Knockouts and

access slots

Ground wire

(top and bottom)

for LCD

Liebert® AC4™

2

Introduction

1.5Typical Configuration

Figure 3 shows an example of external devices connected to the Liebert AC4 controller board. There may be up to four devices connected to the four digital inputs and four digital outputs. Remote access is available through the Service Terminal Interface.

Figure 3 Typical Configuration

DEVICES CONNECTED

TO INPUTS & OUTPUTS

Zone 1 Devices

Device 1

Device 2

	Liebert	Liebert
	Challenger	Challenger
	3000™	3000
	Zone 2 Devices
	Device 3	Device 4

RS232

Liebert	Liebert
Himod™	Himod

3	Liebert® AC4™

Introduction

1.6Controller Board Overview

The Liebert AC4 controller board has connectors for four digital inputs and four digital outputs, as shown below. The board comes complete with light emitting diodes (LEDs) to display the status of connected devices, a serial communications port, a power connection and other features necessary to control your operation.

A - Power	B - Audible	C - Audible horn	D - Common Alarm
On/Off switch		jumper	connectors
	horn
P - 24VAC power			E - Digital output
connector			status LEDs
O - LCD			F - Manual
contrast			Override Switch
adjustment			(outputs)
N - LCD			G - Digital output
			connectors
connector			H - Status LEDs
M - DIP			I - Digital output
switch 1			loss-of-power
			jumper
			J - Digital input
			connectors
L - Serial interface			K - Digital input
connector
(RS232/EIA574)			status LEDs

	Table 1	Controller board components
		Item	Description	For more information, see:
	A - Power On/Off		Power switch for the controller board.	2.4:	Connect Power to the Liebert
	switch				AC4
	B - Audible horn		Provides audible notification when an alarm occurs.	N/A
	C - Audible horn		Jumper to disable the audible horn (factory default is	N/A
	jumper		enabled).
			The two common alarm connections are used to connect to	3.0:	Wiring and Connections
			a secondary warning device such as a horn, light or
	D - Common Alarm			3.3:	Connecting Common Alarm
			Building Management System (BMS). When an alarm is
					Outputs
	connectors		present, the contacts close and the external warning device
				7.4:	Setup System - Setup Common
			is activated/notified. The common alarm contacts may be
					Alarm
			configured to be reset with the Silence button/command.
	E - Digital output		Each output has an LED to indicate its status: ON/OFF	1.7:	LED Indicators
	status LEDs		(energized/de-energized).
	F - Manual Override		Placing the switch in the ON position will turn ON, or
			energize, all four outputs simultaneously. This switch	7.9:	Override Output
	Switch (outputs)
			removes all automatic output control from the Liebert AC4.
			Each of the four output connections is a two-state point:	3.0:	Wiring and Connections
	G - Digital output		ON/OFF (energized/de-energized).	3.2.2:	Connecting Digital Outputs
	connectors		An example of a field digital output is a Liebert	5.5:	View Output Status
			Environmental unit’s remote shutdown input.	7.6:	Setup System - Setup Outputs
	H - Status LEDs		Indicates the operational status of the controller board.	1.7:	LED Indicators

Liebert® AC4™

4

					Introduction
	Table 1	Controller board components (continued)
	Item		Description		For more information, see:
			One of four output jumpers. Each digital output has a
			jumper to set the fail-safe position of the output point when	3.2.3: Setting the Digital Output
	I - Digital output		power fails. The OFF position makes the contact Normally
					Jumpers
	loss-of-power		Open (factory default). The ON position makes the contact
				7.6.4: Configure Output for Loss of
	jumper		Normally Closed.
					Power (“Fail-Safe”)
			Note: The jumper position has no effect on the contact
			when the Liebert AC4 has power.
			Each of the four input connections is a two-state point:	3.0:	Wiring and Connections
	J - Digital input		ON/OFF (energized/de-energized).	3.2.1: Connecting Digital Inputs
	connectors		An example of a field digital input is a Liebert	5.4:	View Input Status
			Environmental unit’s common alarm relay output.	7.3:	Setup System - Setup Inputs
	K - Digital input		Each input has an LED to indicate its status: ON/OFF	1.7:	LED Indicators
	status LEDs		(energized/de-energized).
	L - Serial interface		Connection for laptop or video terminal. Used for	3.4:	RS232 Connector
			configuration and monitoring using the Service Terminal
	connector			A.2:	Connecting to the Service
			Interface. Requires a null modem cable for connectivity
	(RS232/EIA574)				Terminal Interface
			(P/N 201258P1).
	M - DIP switch 1		DIP switch used for resetting password to default.	7.7.1: Change Password
	N - LCD connector		Connection for the LCD on the enclosure door.	N/A
	O - LCD contrast		Adjustment contrast for the LCD on the enclosure door.	N/A
	adjustment
	P - 24VAC power		Power connection for the controller. Requires 24VAC.	2.4:	Connect Power to the Liebert
	connector				AC4

5	Liebert® AC4™

Introduction

1.7LED Indicators

The Liebert AC4 controller board has LED indicators that show the status of inputs, outputs and the common alarm

DS56	OUTPUT1
DS54	OUTPUT2
DS63	OUTPUT3
DS61	OUTPUT4
DS60	OUTPUT5
DS62	OUTPUT6
DS55	OUTPUT7
DS57	OUTPUT8
DS59	CTRLLOCK
DS58	SENLOCK
DS53	CMN ALR
DS52

MOP

DS51 F PROG

DS48 574 TX

DS47 574 RX

DS78 485 RX

DS79 485 TX

DS69 INPUT1

DS71 INPUT2

DS72 INPUT3

DS70 INPUT4

DS67 INPUT5

DS66 INPUT6

DS65 INPUT7

DS64 INPUT8

Output LEDs

Status LEDs

Input LEDs

	Table 2	LED indicators summary
	LED Type		LED	Color	Description
	EIA422		422 TX	Green	Liebert AC4 is transmitting information over the EIA422 port
	LEDs		422 RX	Green	Liebert AC4 is receiving information over the EIA422 port
			OUTPUT1	Green	Not used
			OUTPUT2	Green	Not used
			OUTPUT3	Green	Not used
			OUTPUT4	Green	Not used
			OUTPUT5	Green	Indicates output 1 is ON or energized
	Output LEDs		OUTPUT6	Green	Indicates output 2 is ON or energized
			OUTPUT7	Green	Indicates output 3 is ON or energized
			OUTPUT8	Green	Indicates output 4 is ON or energized
			CTRLLOCK	N/A	Not used
			SENLOCK	N/A	Not used
			CMN ALR	Green	Indicates output is ON or energized
			MOP	Green	Indicates the microprocessor is operating properly (MOP)—must be on before
					Liebert AC4 will function
			FPROG	Green	Indicates firmware is being upgraded—lights up during upgrade process
	Status LEDs		574 TX or 232 TX	Green	Liebert AC4 is transmitting information via the RS232 port
			574 RX or 232 RX	Green	Liebert AC4 is receiving information via the RS232 port
			485 RX	Green	Not used
			485 TX	Green	Not used
			INPUT1	Red	Not used
			INPUT2	Red	Not used
			INPUT3	Red	Not used
	Input LEDs		INPUT4	Red	Not used
			INPUT5	Red	Indicates input 1 is ON or energized
			INPUT6	Red	Indicates input 2 is ON or energized
			INPUT7	Red	Indicates input 3 is ON or energized
			INPUT8	Red	Indicates input 4 is ON or energized

Liebert® AC4™

6

Introduction

1.8Typical Sequence

Figure 4 shows a typical sequence of how the Liebert AC4 functions after detecting a change in a monitored device. Many responses depend on configuration settings. This example shows what happens when a digital input changes state—assuming the input is defined as alarmable—and when the condition returns to normal.

Figure 4 Example of typical sequence

RESPONSES TO AN ALARM

ALARM CONDITION DETECTED

A device connected to the Liebert

AC4 changes state.

The horn sounds (audible horn on the controller board—silence horn by pressing any key on the LCD keypad)

The LCD flashes

ESC	(except during setup)

DEVICE_1 ALARM

CONTACT CLOSED 30-SEP-04 16:23:04

DEVICE_1 ALARM

CONTACT CLOSED

DEVICE_4 STARTED

30-SEP-04 16:23:10

User setup determines output control (for example, the device in alarm might be disabled and a standby device set to operate)

Entry in Alarm Log

Condition (ALARM)

& state (CONTACT CLOSED)

Entry in Active Alarm Log

Condition (ALARM)

& state (CONTACT CLOSED)

Entry in Event Log

Status change (DEVICE_4 STARTED)

RETURN-TO-NORMAL SEQUENCE

RETURN TO NORMAL

The device that triggered the alarm returns to its normal state.

The alarm is cleared

(automatically if Unlatched; must be cleared manually if Latched)

The horn stops sounding

(if user hasn’t silenced it)

The LCD stops flashing

ESC

ALARMS CLEARED

30-SEP-04 16:24:04

DEVICE_1 STARTED DEVICE_2 STARTED DEVICE_3 STARTED DEVICE_4 OFF 30-SEP-04 16:24:06

Entry in Alarm Log

(ALARMS CLEARED)

Entry in Event Log

Actions in response to event (DEVICE_1 STARTED, DEVICE_4 OFF)

7	Liebert® AC4™

Installation

2.0INSTALLATION

2.1Installation Considerations

The Liebert AC4 must be installed indoors and may be mounted on the surface of a wall or flushmounted, depending on the user’s application, the location of equipment to be connected and the type of wall the unit will be mounted on.

The Liebert AC4 should be mounted where it can be easily accessed. On-site personnel would access the unit through the LCD on its front cover or the service terminal connected to the RS232 port.

In addition to the communications connections, the site also must have electrical service and must permit connecting the unit’s four digital inputs and four digital outputs.

The wall material must be capable of supporting the weight of the Liebert AC4: see

8.0 Specifications.

NOTE

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.

2.1.1Unpacking and Preliminary Inspection

•Before unpacking the Liebert AC4, inspect the shipping carton for damage or signs of mishandling, such as gashes or holes in the carton or severely flattened corners.

•Open the shipping crates carefully. Use care to avoid puncturing the container with sharp objects that might damage the contents.

•Inspect the Liebert AC4 and all included components for damage.

•If any damage from shipping or mishandling is observed, immediately file a damage claim with the shipping agency and forward a copy to:

Liebert Corporation

1050 Dearborn Drive P.O. Box 29186 Columbus, OH 43229

Packing Contents

Table 3 Packing manifest

Standard Components

Liebert AC4 controller board in enclosure

User Manual

Keys (2) to panel door lock

RS232 Configuration Cable

Liebert® AC4™

8

Installation

2.2Surface-Mounting the Liebert AC4

NOTE

Removing the conduit knockouts before mounting the Liebert AC4 on the wall will ease installation and prevent strain on the mounting hardware and wall. It is imperative to remove the knockouts if the unit is to be flush-mounted.

After determining where to place the unit, check to ensure that you have all the hardware required to install the panel on the surface of a wall. Obtain the needed tools and material.

Required tools

• Electric drill (if surface is too hard to drive screws without pilot holes)

• Screwdriver

• Marker to denote layout of holes

• Four screws, each #10

2.2.1 Mounting the Panel

! WARNING

Risk of electric shock. Can cause property damage, injury and death.

Check building plans and other relevant documents to determine whether mounting the Liebert AC4 at the selected location might cause cutting or otherwise damaging electrical or communication wiring or pipes.

1.Mark the wall for mounting holes, using the back of the unit as a template (see Figure 5).

2.Drill holes, if required, to install the four #10 screws that will secure the Liebert AC4 to the wall. Clean up the debris.

3.If the wall material is not strong enough to hold the screws securely, use wall anchors.

4.Install the top two screws—the screw heads must be small enough to slip through the larger, bottom portion of the pear-shaped mounting slot in the Liebert AC4 (see inset in Figure 5). The screws must also be large enough to extend over the edges of the top of the mounting slot.

5.Hang the Liebert AC4 on the screws, letting the panel slip down until the screws are in the smaller, upper portion of the slot.

6.Tighten the screws until they are snug.

7.Insert the remaining two screws in the bottom holes on the back of the panel and tighten.

Figure 5 Mounting dimensions

12.5"

(317.5mm)

0.213"

(5.4mm)

10"

(254mm)

Liebert AC4

back plate

0.375"

(9.6mm)

	Mounting Slot
		0.213" (5.4mm)
		Bottom hole diameter

9	Liebert® AC4™

Installation

2.3Flush-Mounting the Liebert AC4

NOTE

Removing the conduit knockouts before mounting the Liebert AC4 on the wall will ease installation and prevent strain on the mounting hardware and wall. It is imperative to remove the knockouts if the unit is to be flush-mounted.

The rectangular access doors on the top and bottom of the Liebert AC4 must be reversed so they slide the opposite direction. Leaving the doors as shipped from the factory prevents them from being opened when the panel is flush mounted in a wall.

The Liebert AC4 may be flush mounted according to company practices—either with screws through the sides of the panel into wall supports or with hanging hardware that attaches to the back of the panel. After determining how and where to place the unit, check to ensure that you have all the hardware required to install the panel in the wall. Obtain the needed tools.

Required tools

• Saw

• Electric drill

• Screwdriver

• Marker to denote layout of the hole to accommodate the Liebert AC4

• Trim ring and associated hardware

• Mounting hardware

2.3.1 Mounting the Panel

! WARNING

Risk of electric shock. Can cause property damage, injury and death.

Check building plans and other relevant documents to determine whether mounting the Liebert AC4 at the selected location might cause cutting or otherwise damaging electrical or communication wiring or pipes.

1.Mark the wall for the cutout to accommodate the panel, using the back of the unit as a template.

2.Drill a pilot hole for the saw blade, if required.

3.Use the saw to cut out the marked section of the wall (if not new construction).

4.Rest the Liebert AC4 in the wall and mark where mounting screws will be inserted into the wall studs or other support member.

5.Remove the panel and drill the holes for the mounting screws or wall anchors. Clean up the debris.

6.Reverse the slide direction of the rectangular access doors on the top and bottom of the Liebert AC4. Leaving the doors as shipped from the factory prevents them from being opened when the panel is flush mounted in a wall.

7.Attach any field-supplied mounting hardware.

8.Reinsert the assembly into the wall.

9.Insert and tighten the screws or wall anchors.

Liebert® AC4™

10

Installation

2.4Connect Power to the Liebert AC4

The Liebert AC4 requires 24VAC for proper operation. Liebert recommends using the optional Transformer Module manufactured by Liebert or another UL-approved class 2 power unit to obtain proper voltage. If the power unit is not a class 2 circuit, it must be protected with an IEC 5 x 20mm time lag 2A fuse. For information, consult your local dealer, Emerson representative or the Emerson Network Power Liebert Worldwide Support Group.

! WARNING

Risk of electric shock. Can cause property damage, injury and death.

Check that power is removed from wires prior to installation. This unit should be installed only by properly trained and qualified personnel.

! CAUTION

Risk of electric shock. Can cause property damage, injury and death.

The Liebert AC4 is designed for use on properly grounded (earthed) 24VAC power, 50Hz or 60Hz. The ground wire for the power lead must be wired to the earth ground terminal (stud located next to the 24VAC terminal block).

This equipment is intended to be installed by a qualified and certified electrician who must review and approve customer supplied wiring and circuit breakers, verify correct input and grounded (earthed) connections to ensure compliance with technical standards and national and local electrical codes.

! WARNING

Risk of electric shock. Can cause property damage, injury and death.

Be sure that the Power On/Off switch is set to OFF before installing any wiring to this unit. The switch is in the top left corner of the unit, just below the battery pack.

To connect electrical power:

1.Run conduit and electrical wiring from building to the Liebert AC4.

2.Use copper wires only; proper wiring to use for power is 18-22 AWG stranded and shielded (18 AWG is recommended—see Table 4). Strip wires 1/2".

Figure 6 Electrical connections to panel

External wiring
through knockout			Power
			On/Off
			switch
Ground wire
(black)
Earth ground
terminal
24VAC wiring			24VAC input
(red & white)			connector

3.Secure the incoming electrical service wires to the Liebert AC4’s 24VAC input by sliding the wires into TB7, the 24VAC input terminal block. There is no polarity requirement when connecting to TB7. The ground wire must be connected to the earth ground terminal located on the side of the panel (see Figure 6).

11	Liebert® AC4™

Wiring and Connections

3.0WIRING AND CONNECTIONS

! WARNING

Risk of electric shock. Can cause property damage, injury and death.

Switch Off electric power to the Liebert AC4 before installing any wiring to the unit or changing input or output connections. The Power On/Off switch is in the top left corner of the unit.

3.1Wiring Specifications

Input and output connections to the Liebert AC4 may be made in any order—it is not necessary, for example, to make all input connections before making any output connections. Use copper conductors only for all wiring.

Table 4	Wiring specifications
Connection		Supported Wire Type	Maximum Wire Length			Rating
Digital		18-22 AWG Stranded & Unshielded
		18 AWG* (recommended)		750 ft. (225m)		Dry Contact
Input		Non Plenum - Belden 9740				(24VDC, 10 mA)
		Plenum - Belden 89740
		18-22 AWG Stranded & Unshielded	18 AWG*	20 AWG	22 AWG
Digital			(recommended)
		18 AWG* (recommended)				24VAC @3A
			@3A 50 ft. (15m)	@3A 40 ft. (12m)	@3A 25 ft. (7m)
Output		Non Plenum - Belden 9740
		Plenum - Belden 89740	@2A 100 ft. (30m)	@2A 60 ft. (18m)	@2A 35 ft. (10m)
			@1A 200 ft. (60m)	@1A 100 ft. (30m)	@1A 75 ft. (23m)
		18-22 AWG Stranded & Unshielded	18 AWG*	20 AWG	22 AWG
Common			(recommended)
Alarm		18 AWG* (recommended)				24VAC @3A
			@3A 50 ft. (15m)	@3A 40 ft. (12m)	@3A 25 ft. (7m)
		Non Plenum - Belden 9740
Output
		Plenum - Belden 89740	@2A 100 ft. (30m)	@2A 60 ft. (18m)	@2A 35 ft. (10m)
			@1A 200 ft. (60m)	@1A 100 ft. (30m)	@1A 75 ft. (23m)
Communication		Null Modem Cable		50 ft. (15m)		N/A
RS232
24VAC Power		18-22 AWG Stranded & Shielded
		18 AWG* (recommended)
Connection				150 ft. (45m)		24VAC @1.3A
		Non Plenum - Belden 8770
(TB7)
		Plenum - Belden 88770
* Recommended

Liebert® AC4™

12

Wiring and Connections

3.2Connecting Digital Inputs and Outputs

The digital inputs and outputs are on the lower right side of the Liebert AC4 printed wiring assembly board. This section describes how to connect devices to the Liebert AC4’s inputs and outputs.

Each input is tied to an output with the same number:

•Input 1 is tied to Output 1 (default name: Device_1)

•Input 2 is tied to Output 2 (default name: Device_2)

•Input 3 is tied to Output 3 (default name: Device_3)

•Input 4 is tied to Output 4 (default name: Device_4)

Up to four devices may be connected to the Liebert AC4. Each device must be connected to an input and an output with the same number.

To determine the proper wire size, see Table 4 Wiring specifications.

NOTE

Each terminal block is a removable assembly to permit easier connection of more than one

input or output at a time. If making multiple connections, grasp the upper portion of a block and pull firmly until the assembly pulls apart.

After making the connections, push the removed piece back into the portion attached to the printed wiring assembly until the terminal block pieces lock together.

Connecting Liebert Precision Cooling Units

For Liebert Precision Cooling units, follow these steps (be sure to connect the same device to inputs and outputs with the same number (Input 1 and Output 1, Input 2 and Output 2, and so on):

•Connect a digital input from the Liebert AC4 to the Common Alarm Relay of the environmental unit: terminals 75/76 or TB1-6,TB1-7.

•Connect a digital output (numbered the same as the input) from the Liebert AC4 to the Remote Shutdown (Power Control) of the environmental unit: terminal 37/38 or TB1-4, TB1-5.

3.2.1Connecting Digital Inputs

The four digital inputs are on the lower right side of the

OUTPUT TERMINAL

Liebert AC4, just below the output terminal blocks, as

BLOCKS

shown at right. These inputs are numbered 1 through 4.

Note numbering keys

To connect an input:

to right of terminal

blocks; outputs are

1.

Turn Off electrical power to the Liebert AC4.

numbered from

2.

If necessary, remove a conduit knockout to permit wire

bottom (1) to top (4)

entry into the Liebert AC4 enclosure.

3.

Bring the wire(s) into the Liebert AC4 enclosure

through a conduit knockout or access slot.

Numbering

4.

Loosen the appropriate screw and slip the stripped end

keys

of the wire into the terminal block.

5.

Tighten the screw until it holds the wire snugly.

INPUT TERMINAL

BLOCKS

Note numbering keys

to right of terminal

blocks; inputs are

numbered from

bottom (1) to top (4)

13	Liebert® AC4™

Wiring and Connections

3.2.2Connecting Digital Outputs

The four digital outputs are found on the lower right side of the Liebert AC4 just above the input terminal blocks, as shown at right. These outputs are numbered 1 through 4.

To connect an output:

1.Turn OFF electrical power to the Liebert AC4.

2.If necessary, remove a conduit knockout to permit wire entry into the Liebert AC4 enclosure.

3.Bring the wire(s) into the Liebert AC4 enclosure through a conduit knockout or access slot.

4.Loosen the appropriate screw and slip the stripped end of the wire into the terminal block.

5.Tighten the screw until it holds the wire snugly.

! CAUTION

To reduce the risk of fire or electric shock, do not interconnect the outputs of different class 2 circuits.

3.2.3 Setting the Digital Output Jumpers

Digital output jumpers (four)

Each digital output has an associated jumper to define its operation when power is interrupted. This puts the Liebert AC4 in a fail-safe mode and ensures proper functioning when the board has no power.

The Liebert AC4 comes from the factory with all digital output jumpers in the OFF position (normally open). The jumper setting for each digital output can be changed to ON (normally closed). The settings are shown in Table 5.

Table 5

Digital output jumper settings

Output status

Setting

(power loss)

OFF

Normally open

ON

Normally closed

To change the output jumper setting:

1. Find the respective loss-of-power jumper on the circuit board, as shown above. See Table 1 Controller board components for more information.

2.Decide whether your configuration requires the jumper to be OFF or ON.

3.Set the jumper as needed:

•Set the jumper to OFF by placing the loss-of-power jumper on the middle and top pins.

•Set the jumper to ON by placing the black jumper on the middle and bottom pins.

Liebert® AC4™

14

Wiring and Connections

3.3 Connecting Common Alarm Outputs

The common alarm relay, found in the top right corner of the Liebert AC4, permits the user to connect auxiliary notification equipment, such as lights, horns and sirens, to the Liebert AC4. To determine the proper wire size, see Table 4 Wiring specifications.

There are two connectors for the common alarm output. However, the connectors are not individual relay outputs. The connectors should be treated as a double-pole, double-throw (DPDT) relay.

The common alarm relay is energized whenever an alarm occurs.

Common alarm outputs

To connect an output:

1.Turn OFF electrical power to the Liebert AC4.

2.If necessary, remove a conduit knockout to permit wire entry into the Liebert AC4 enclosure.

3.Bring the wire(s) into the Liebert AC4 enclosure through a conduit knockout or access slot.

4.Loosen the appropriate screw and slip the stripped end of the wire into the terminal block.

5.Tighten the screw until it holds the wire snugly.

3.4RS232 Connector

The Liebert AC4’s Service Terminal Interface offers full configuration and monitoring capability via the RS232 port (see A.2 - Connecting to the Service Terminal Interface).

The RS232 port requires a null modem cable. Connect one end of the cable to the Liebert AC4’s RS232 port, shown at right, and the other end to the COM1 port of a laptop computer or video terminal.

Serial interface connector (RS232/EIA5 74)

15	Liebert® AC4™

Overview of Menus

4.0OVERVIEW OF MENUS

There are two ways to access the Liebert AC4: the LCD on the front of the enclosure and the Service Terminal Interface, which is accessible through any computer using a communications program. Many viewing and configuration tasks can be performed through either interface, but some are available only through the Service Terminal Interface.

•Step-by-step instructions for all functions appear in Sections 5.0 through 7.0. These instructions use examples of LCD screens to illustrate most functions, except those not available via the LCD.

•Examples of all Service Terminal Interface screens appear in Appendix A - Service Terminal Interface, along with instructions on how to connect to the Service Terminal Interface.

Table 6 lists all Liebert AC4 functions and shows whether they can be performed through the LCD interface and where to find information.

	Table 6	Guide to Liebert AC4 functions
			Can be performed via:		Where to find:
		Function	LCD	Service	Instructions on	Service Terminal
				Terminal	using function	screen examples
	VIEW STATUS FUNCTIONS
	View Active Alarms		4	4	page 19	page 57
	View Alarm Log		4	4	page 20	page 58
	View Event Log		4	4	page 21	page 59
	View Input Status		4	4	page 22	page 59
	View Output Status		4	4	page 23	page 60
	SILENCE ALARM & BACK UP LOGS FUNCTIONS
	Silence Alarm		4	4	page 24	page 61
	(On the LCD, press any key to silence an alarm)
	Back Up Log Files		—	4	page 25	page 62
	SYSTEM & CONTROL FUNCTIONS
	Login		4	4	page 27	page 63
	Setup System		4	4	page 29	page 64
	Setup Inputs		4	4	page 29	page 65
	Setup Common Alarm		4	4	page 32	page 66
	Setup Zones		4	4	page 33	page 66
	Setup Outputs		4	4	page 34	page 67
	Setup System Info		4	4	page 36	page 68
	Change Password		4	4	page 36	page 68
	Set Date & Time/Automatic Daylight Saving Time		4	4	page 37	page 69
	Setup Site ID		4	4	page 37	page 69
	Backup and Upload Configuration File		—	4	page 38	page 70
	Factory Defaults		4	4	page 41	page 71
	Perform Firmware Update		—	4	page 41	page 72
	Setup Operation		4	4	page 43	page 73
	Override Output		4	4	page 47	page 76
	Clear Alarms & Logs		4	4	page 48	page 77
	Clear Active Alarms		4	4	page 48	page 77
	Clear the Alarm Log		4	4	page 48	page 77
	Clear the Event Log		4	4	page 48	page 78

Liebert® AC4™

16

Overview of Menus

4.1Opening Screen Overview

The Liebert AC4 displays the Opening Screen at startup, as shown in Figure 7.

•If any alarms are active, the Current Alarm screen appears. (Pressing any key on the LCD keypad will silence the audible alarm.)

If no alarms are present, the Main Menu appears.

4.2Main Menu Overview

The Main Menu offers access to all functions within the panel. As shown in Table 7, the functions are organized into three sections with step-by-step instructions.

Table 7		Primary Functions Overview
		Section	Description
			These features are available to all users. This permits all personnel to check the
5.0	- View Status Options		status of any monitored equipment or location. From this menu, any user may:
	(both LCD and Service		• View active alarms
	Terminal Interface)		• View the current status of digital inputs and outputs
			• View data stored in the alarm and event logs
6.0	- Silence Alarm & Backup		These features—available via the Service Terminal Interface only—allow users to:
	Log Files (Service		• Silence the audible alarm
	Terminal Interface only)		• Back up the alarm and event logs
7.0	- System and Control		These options require a password. Authorized users may:
	Options (some functions		• Configure the Liebert AC4
	available via Service		• Override automatic control of outputs to force an output ON or OFF
	Terminal Interface only)		• Clear active alarms and delete all records in the alarm and event logs

4.3LCD Menu Overview

Figure 7 shows an overview of the initial screens available through the LCD interface. For comparable information about the Service Terminal Interface screens, see A.3 - Overview of Menus.

Figure 7 LCD Menu overview

Opening Screen

LIEBERT AC4

(If any alarms detected)

DD-MON-YY HR:MM:SS

Current Alarm screen

VX.XXX.X

PRESS =STATUS/SETUP

(see 5.1 View Active Alarms)

Main Menu

VIEW STATUS

SYSTEM AND CONTROL

↑↓=NEXT

=SELECT

“View Status” selected

See Section

“System & Control” selected

See Section

> VIEW

STATUS

5.0

VIEW STATUS

7.0

SYSTEM AND

CONTROL

> SYSTEM AND CONTROL

↑↓=NEXT

=SELECT

↑↓=NEXT

=SELECT

View Status Menu

System & Control Menu

(All users - no password)

See Section

(Password required)

See Section

VIEW

ACTIVE ALARMS

5.1

SETUP SYSTEM

7.2

VIEW

ALARM

LOG

5.2

OVERRIDE OUTPUT

7.9

VIEW

EVENT

LOG

5.3

CLEAR ALARMS & LOGS

7.10

VIEW

INPUT

STATUS

5.4

VIEW

OUTPUT STATUS

5.5

17	Liebert® AC4™

View Status Options

5.0VIEW STATUS OPTIONS

NOTE

For ease of understanding, this section uses the LCD interface to illustrate most instructions, except for features that are available only through the Service Terminal Interface. All Service Terminal Interface screens appear in Appendix A - Service Terminal Interface.

The View Status menu allows any user to view currently active alarms, data stored in the alarm and event logs and the status of all inputs and outputs. The arrows ↑↓ are used to scroll through the menu. The Enter key is used to select the menu item.

This section presents step-by-step instructions for each of the following options:

•View Active Alarms

•View Alarm Log

•View Event Log

•View Input Status

•View Output Status

Figure 8 shows the main options available from the View Status menu.

Figure 8 Menu overview - View Status menu

Opening Screen

LIEBERT AC4

DD-MON-YY HR:MM:SS

VX.XXX.X

PRESS =STATUS/SETUP

Main Menu

>VIEW STATUS

SYSTEM AND CONTROL

↑↓=NEXT =SELECT

View Status

VIEW ACTIVE ALARMS

VIEW ALARM LOG

VIEW EVENT LOG

VIEW INPUT STATUS

VIEW OUTPUT STATUS

View Active Alarms

View Alarm LogView Status optionsView Event Log

> ACTIVE ALARM 40/40	See
DEVICE_1 ALARM	Section
CONTACT CLOSED	5.1

> ALARM RECORD 99/99		See	> EVENT RECORD 99/99	See
DEVICE_1 ALARM		Section	SYSTEM	Section
CONTACT CLOSED		5.2	USER LOGIN	5.3
30-JUN-04	09:29:10		19-MAY-04 10:07:00
NO STANDBY AVAILABLE			DEVICE_1 HW FORCE ON
			CONTACT CLOSED
29-JUN-04	10:45:00		18-MAY-04 06:47:03
STNDBY DEVICE FAILED			DEVICE_4 FORCE OFF
			CONTACT OPEN
29-JUN-04	10:39:00		18-MAY-04 05:22:17
NO RESTART AVAILABLE			DEVICE_3 AUTO
			CONTACT OPEN
28-JUN-04	06:54:09		18-MAY-04 04:32:11

View Input Status			View Output Status
INPUT /	STATUS	See	OUTPUT / STATUS		See
> DEVICE_1	ALARM	Section	> DEVICE_1	ALARM	Section
DEVICE_2	NORMAL	5.4	DEVICE_2	OPERATING	5.5
DEVICE_3	NORMAL		DEVICE_3	OPERATING
DEVICE_4	NORMAL		DEVICE_4	OPERATING

Liebert® AC4™

18

View Status Options

5.1	View Active Alarms	Main Menu
	The Active Alarm screen displays all alarms that are occurring, up to a
		> VIEW STATUS
	maximum of 40.		SYSTEM AND CONTROL
	A Current Alarm screen appears automatically whenever an alarm		↑↓=NEXT			=SELECT
	occurs—except during setup. This screen can display only the two most
	recent active alarms. To view any other active alarms, use the View	View Status Menu
	Active Alarms feature.
	You may view active alarms at any time by using the following steps:	> VIEW ACTIVE ALARMS
			VIEW ALARM LOG
	• From the Main Menu, use the arrows ↑↓ to choose View Status, as		VIEW EVENT LOG
			VIEW INPUT STATUS
	shown at right, and then press Enter .		VIEW OUTPUT STATUS
	• From the View Status Menu, use the arrows ↑↓ to choose View
	Active Alarms and press Enter .	Active Alarms
5.1.1	Active Alarms	> ACTIVE ALARM 01/40

DEVICE_1 ALARM

The Active Alarms screen displays up to 40 records; it shows any active CONTACT CLOSED alarm and any Latched alarm that has not been cleared. Examples of

alarms include inputs in alarm status and failure of a standby device. When any alarms are present, the Active Alarms screen shows descriptive details for each alarm:

•the source of the alarm (for example, DEVICE_1)

•the status of an input (CONTACT CLOSED)

If there are no active alarms, the screen displays the message:

NO ALARMS PRESENT

Viewing Additional Screens

There may be up to 40 records of alarm data.

•To view additional records, use the arrows ↑↓.

•To return to the previous screen, press the ESC key.

Clearing Active Alarms

To clear all active alarms, see 7.10 Clear Alarms & Logs. Alarm records are stored in the Alarm Log.

19	Liebert® AC4™

View Status Options

5.2View Alarm Log

The Alarm Log contains up to 99 records of alarms that have occurred. Records are added to this log as alarms occur.

To view the Alarm Log:

Main Menu

>VIEW STATUS

SYSTEM AND CONTROL

↑↓=NEXT =SELECT

•From the Main Menu, use the arrows ↑↓ to choose View Status, then press Enter .

•From the View Status Menu, use the arrows ↑↓ to choose View Alarm Log, then press Enter .

5.2.1Alarm Log

The Alarm Log screen displays up to 99 records showing alarm data, including inputs and outputs in alarm status and failure of a standby device. If the log contains any alarm records, the Alarm Log screen displays details for each alarm:

•the source of the alarm (for example, DEVICE_1)

•the status of an input or output (CONTACT CLOSED) or a brief description of the problem (STNDBY DEVICE FAILED)

•the date and time the alarm occurred

Table 8 shows conditions that the alarm log records for digital inputs and in the panel itself.

Table 8	Alarm log conditions
SOURCE		Digital Input	Panel
			LOSS OF POWER
			ALARM SILENCED
		ALARM	ALARMS CLEARED
CONDITIONS		NORMAL	STNDBY DEVICE FAILED
			NO STANDBY AVAILABLE
RECORDED			NO RESTART AVAILABLE

If there are no alarms in the log, the screen displays the message:

NO ALARMS

Viewing Additional Screens

There may be up to 99 records of alarm data.

View Status Menu

VIEW ACTIVE ALARMS
> VIEW	ALARM LOG
VIEW	EVENT	LOG
VIEW	INPUT	STATUS
VIEW	OUTPUT STATUS

Alarm Log

> ALARM RECORD 99/99
DEVICE_1 ALARM
CONTACT CLOSED
30-JUN-04	09:29:10
NO STANDBY AVAILABLE
29-JUN-04	10:45:00
STNDBY DEVICE FAILED
29-JUN-04	10:39:00
NO RESTART AVAILABLE
28-JUN-04	06:54:09

•To view additional records, use the arrows ↑↓.

•To return to the previous screen, press the ESC key.

5.2.2Backing Up the Alarm Log (Service Terminal Interface only)

The alarm log is stored as a file in the Liebert AC4; it can hold no more than 99 records. When the log is full, the oldest records are deleted from the end of the file as new alarm records are added at the beginning.

You may back up the alarm log file to a remote computer using the Service Terminal Interface, as described in 6.2 Back Up Log Files (Service Terminal Interface only).

To delete all records in the alarm log, see 7.10 Clear Alarms & Logs.

Liebert® AC4™

20

View Status Options

5.3View Event Log

In addition to alarms, the Liebert AC4 tracks other changes in the Event Log to assist users with verifying operational and troubleshooting problems. Events reflect changes in the status of an input that is defined as an event or the change of state of an output (i.e., manually forced ON or OFF). Other events may be informational, such as a user login. The Event Log contains up to 99 records of events, which are added as they occur.

To view the Event Log:

•From the Main Menu, use the arrows ↑↓ to choose View Status, then press Enter .

•From the View Status Menu, use the arrows ↑↓ to choose View Event Log, then press Enter .

5.3.1Event Log

The Event Log screen displays up to 99 recent events. If the log contains any event records, the Event Log screen displays details for each event:

•the event source (for example, DEVICE_1)

•the status of an input or output (CONTACT CLOSED) or a brief description of the event (USER LOGIN)

•the date and time the event occurred

Table 9 shows conditions that the event log records for inputs and outputs and in the panel itself.

Table 9	Event log conditions
SOURCE		Digital Input	Digital Output	Panel
			STARTED	ALARMS CLEARED
			ON	ALARM SILENCED
			OFF	NO STANDBY OUTPUTS
		EVENT	HW FORCE ON	AVAILABLE
		NORMAL	AUTO	NO STANDBY TESTING
CONDITIONS			FORCE ON	DEVICE AVAILABLE
			FORCE OFF	TIME & DATE SET
RECORDED			RESTORED	USER LOGIN

If there are no records in the log, the screen displays the message:

NO EVENTS

Viewing Additional Screens

There may be up to 99 records of event data.

Main Menu

>VIEW STATUS

SYSTEM AND CONTROL

↑↓=NEXT =SELECT

View Status Menu

VIEW ACTIVE ALARMS
VIEW	ALARM LOG
> VIEW	EVENT	LOG
VIEW	INPUT	STATUS
VIEW	OUTPUT STATUS

Event Log

> EVENT RECORD 99/99

SYSTEM USER LOGIN

19-MAY-04 10:07:00

DEVICE_1 HW FORCE ON CONTACT CLOSED 18-MAY-04 06:47:03

DEVICE_4 FORCE OFF CONTACT OPEN 18-MAY-04 05:22:17

DEVICE_3 AUTO

CONTACT OPEN 18-MAY-04 04:32:11

DATE AND TIME SET 18-MAY-04 03:11:43

DEVICE_4 FORCE ON CONTACT CLOSED 18-MAY-04 02:34:00

•To view additional records, use the arrows ↑↓.

•To return to the previous screen, press the ESC key.

5.3.2Backing Up the Event Log (Service Terminal Interface only)

The event log is stored as a file in the Liebert AC4; it can hold no more than 99 records. When the log is full, the oldest records are deleted from the end of the file as new event records are added at the beginning.

You may back up the event log file to a remote computer using the Service Terminal Interface, as described in 6.2 Back Up Log Files (Service Terminal Interface only).

To delete all records in the event log, see 7.10 Clear Alarms & Logs.

21	Liebert® AC4™