Liebert AC4 - Manual

iv FIGURES Figure 1 AC4 enclosure—external features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Figure 2 AC4 enclosure—internal features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2...

Introduction 1 1.0 I NTRODUCTION The Liebert AC4 is ideal for coordinated control of systems with redundant equipment, such as multiple environmental units or pumps. When the AC4 controller detects an alarm in an operating device, the AC4 enables a standby device and controls the device in alarm as ...

Introduction 2 1.4 Outside Enclosure Overview The AC4’s 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 a...

Introduction 3 1.5 Typical Configuration Figure 3 shows an example of external devices connected to the AC4’s controller board. There may be up to four devices connected to the four digital inputs and four digital outputs. Remote access is avail- able through the Service Terminal Interface. Figure 3...

Introduction 4 1.6 Controller Board Overview The AC4’s 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 connec...

Introduction 6 1.7 LED Indicators The AC4’s controller board has LED indicators that show the status of inputs, outputs and the com- mon alarm Table 2 LED indicators summary LED Type LED Color Description EIA422 LEDs 422 TX Green AC4 is transmitting information over the EIA422 port 422 RX Green AC4 ...

Introduction 7 1.8 Typical Sequence Figure 4 shows a typical sequence of how the 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 alarmabl...

Installation 8 2.0 I NSTALLATION 2.1 Installation Considerations The AC4 must be installed indoors and may be mounted on the surface of a wall or flush-mounted, 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 AC4 sho...

Installation 9 2.2 Surface-Mounting the AC4 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 ...

Installation 10 2.3 Flush-Mounting the AC4 The 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 ens...

Installation 11 2.4 Connect Power to the AC4 The 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 protec...

Wiring and Connections 12 3.0 W IRING AND C ONNECTIONS 3.1 Wiring Specifications Input and output connections to the 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. ! CAUTION...

Wiring and Connections 13 3.2 Connecting Digital Inputs and Outputs The digital inputs and outputs are found on the lower right side of the AC4’s printed wiring assembly board. This section describes how to connect devices to the AC4’s inputs and outputs.Each input is tied to an output with the same...

Wiring and Connections 14 3.2.3 Setting the Digital Output Jumpers Each digital output has an associated jumper to define its operation when power is interrupted. This puts the AC4 in a fail-safe mode and ensures proper functioning when the board has no power.The AC4 comes from the factory with all ...

Overview of Menus 15 4.0 O VERVIEW OF M ENUS There are two ways to access the 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 i...

Overview of Menus 16 4.1 Opening Screen Overview The 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. ...

View Status Options 17 5.0 V IEW S TATUS O PTIONS 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...

View Status Options 18 5.1 View Active Alarms The Active Alarm screen displays all alarms that are occurring, up to a maximum of 40.A Current Alarm screen appears automatically whenever an alarm occurs—except during setup. This screen can display only the two most recent active alarms. To view any o...

View Status Options 19 5.2 View 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: • From the Main Menu, use the arrows ↑↓ to choose View Status , then press Enter ↵. • From the View Status Menu, use th...

View Status Options 20 5.3 View Event Log In addition to alarms, the 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....

View Status Options 21 5.4 View Input Status The Input Status option allows you to view the current status of all four digital inputs.To view the Input Status: • 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 Status Options 22 5.5 View Output Status The Output Status option allows you to view the current status of all four outputs.To view the Output Status: • From the Main Menu, use the arrows ↑↓ to choose View Status , then press Enter ↵. • From the View Status Menu, use the arrows ↑↓ to choose Vie...

Silence Alarm & Backup Log Files (Service Terminal Interface) 23 6.0 S ILENCE A LARM & B ACKUP L OG F ILES (S ERVICE T ERMINAL I NTERFACE ) This section describes two features that are available in the Service Terminal Interface: • Silence Alarm• Backup Log Files 6.1 Silence Alarm (Service T...

Silence Alarm & Backup Log Files (Service Terminal Interface) 24 6.2 Back Up Log Files (Service Terminal Interface only) The AC4 maintains two types of logs—alarm and event—that may be backed up to a remote com- puter.This feature is available only through the Service Terminal Interface.To back ...

Silence Alarm & Backup Log Files (Service Terminal Interface) 25 5. At the top of the HyperTerminal window, shown below, click on Transfer , then on Receive File . 6. In the Receive File window, as shown above: • In the Place Received File in the Following Folder box, enter the name and location...

System and Control Options 26 7.0 S YSTEM AND C ONTROL O PTIONS The System and Control menu allows you to configure the AC4—setting up inputs and outputs and system features such as date and time. This menu also provides a vehicle for manually changing the state of an output to ON or OFF, clearing a...

System and Control Options 27 Figure 9 shows the main options available from the System & Control menu. Figure 9 Menu overview - System and Control 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 L...

System and Control Options 28 7.2 Setup System - Overview The Setup System screen displays six options that allow you to configure input and output devices, the common alarm, and a variety of system details, such as login password and system date and time: • Setup Inputs• Setup Common Alarm• Setup Z...

System and Control Options 29 7.3.1 Change Label (Name of Input) Each input has a default label (Device_1, Device_2, etc.) that you may change to a more descriptive name for ease in recognizing alarms and events associated with the input. The label may consist of up to eight characters (see Table 12...

System and Control Options 30 7.3.4 Set Up Alarmable Inputs in Latched or Unlatched Mode Alarmable input points may be set up in Latched mode (Y), which requires the user to clear the AC4 alarms after an alarm has occurred, or Unlatched mode (N), in which alarms will automatically clear after a retu...

System and Control Options 31 7.4 Setup System - Setup Common Alarm The audible alarm sounds after the AC4 detects an alarm condition in any input that has been defined as alarmable. Once the alarm is silenced, there are two options: • By default, the common alarm remains energized until all input a...

System and Control Options 32 7.5 Setup System - Setup Zones The AC4 has two zones that may be used to define different areas—rooms or sections of a room. The AC4 effectively performs as two separate units, controlling each zone separately, for examply, using a different rotation sequence for device...

System and Control Options 33 7.6 Setup System - Setup Outputs The AC4 has four outputs that may be configured individually. These outputs correspond to the four numbered inputs. For example, Device_1 is the unit connected to Input 1 and to Output 1. The output name is the same as the input name, as...

System and Control Options 34 7.6.2 Define Operating or Standby Mode Each output may be defined as Operating (OP), Standby (ST), or Not Used (NU). This setting takes precedence over any setting in the over- ride menu (see 7.9 - Override Output ). Default settings are: • Outputs 1, 2 and 3 are in Ope...

System and Control Options 35 7.7 Setup System - Setup System Info The Setup System Info options allow users to: • Change Password —used for access to system setup functions • Set Date & Time/Automatic Daylight Saving Time —used to set the AC4’s date and time and to enable automatic time change ...

System and Control Options 36 7.7.2 Set Date & Time/Automatic Daylight Saving Time The AC4 has a built-in real-time clock that is backed up by an encapsulated lithium battery and set up to adjust automatically for daylight saving time twice a year. The Setup System Info menu allows you to set th...

System and Control Options 37 7.7.4 Backup and Upload Configuration File (Service Terminal Interface only) This operation may be performed only through the Service Terminal Interface. It permits the user to make a copy of the AC4’s configuration settings and save it as a file on the computer connect...

System and Control Options 38 Back Up the Configuration File 8. At the prompt to Initiate a Backup of Configuration File, enter Y (Yes - begin) or N (No - cancel). The current setting appears in brackets—[N] in the following example. 9. At the top of the HyperTerminal window, shown below, click on T...

System and Control Options 39 Upload the Configuration File 13. At the prompt to Initiate an Upload of Configuration File, enter Y (Yes - begin) or N (No - cancel). The current setting appears in brackets—[N] in the following example. 14. At the top of the HyperTerminal window, shown below, click on...

System and Control Options 40 7.7.5 Factory Defaults At any time, you may restore all default values for settings in the AC4 as it was shipped. The password is the sole exception when reverting to the factory default settings. The password can be reset to the factory default of AAAA through the DIP ...

System and Control Options 42 7.8 Setup Operation The AC4’s operation features allow you to set up a rotation sequence to alternate which devices are operating and which are placed on Standby, as well as test devices while in Standby mode and specify what to do when a Standby device goes into alarm ...

System and Control Options 43 7.8.1 Turn Automatic Sequencing On or Off Use automatic sequencing to set up a schedule for rotation of redundant devices. For example, three devices might be in operating mode while a fourth device is in standby mode. Every two days, the AC4 returns the standby device ...

System and Control Options 44 7.8.2 Turn Standby Testing On or Off Standby testing permits scheduling an automatic operational check of devices in Standby mode. When this feature is activated (ON), the AC4 tests all devices in Standby mode by putting each device in operating mode for a designated ti...

System and Control Options 45 7.8.4 Specify Hold Delay Time After an output changes state, the hold delay timer directs the AC4 to ignore all inputs in the same zone for the specified time.This delay is the amount of time that must elapse before the AC4 acknowledges a change of state in any input. T...

System and Control Options 46 7.9 Override Output The Override Output feature allows you to manually change the state of any digital output to ON or OFF, overriding automatic control by the AC4 (the default setting for all outputs). This menu also allows you to release the manual override, returning...

System and Control Options 47 7.10 Clear Alarms & Logs The Clear Alarms & Logs menu allows you to clear active alarms or delete all records from either of the AC4’s alarm and event logs.To clear alarms or logs: Log In and Choose Clear Alarms & Logs • From the Main Menu, use the arrows ↑↓...

Specifications 48 8.0 S PECIFICATIONS 8.1 AC4 Specifications Power Requirements 24VAC ±10% of nominal 50/60 Hz 1.3A, 30VA NOTE If the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired. Dimensions W x D x H, in. (mm) 14-1/4 x 2-3...

Comparison of Functions: LCD and Service Terminal Interface 49 A PPENDIX A - S ERVICE T ERMINAL I NTERFACE The Service Terminal Interface allows access to all functions of the AC4, including some that are not possible through the LCD interface. This interface is accessible through any computer using...

Connecting to the Service Terminal Interface 50 A.2 C ONNECTING TO THE S ERVICE T ERMINAL I NTERFACE This section describes how to set up and connect to the Service Terminal Interface. To access the Ser- vice Terminal Interface, you will need: • A null modem cable to connect a computer’s COM1 port t...

Connecting to the Service Terminal Interface 51 A.2.1 Create a Connection Before connecting to the Service Terminal Interface, you must create a connection and specify the method to be used for connection, as described in the following steps.1. Start the HyperTerminal program—to do this, click on th...

Connecting to the Service Terminal Interface 52 Properties Setup 9. Open the Properties window by clicking on File , then on Properties , as shown below left. 10. In the Properties window, above right, click on the Settings tab and choose the following settings: • Function, arrow, and ctrl keys act ...

Connecting to the Service Terminal Interface 53 A.2.2 Connect to the Service Terminal Interface After creating and setting up a connection, use a communications program such as HyperTerminal to access the AC4’s Service Terminal Interface.1. Verify communications connections between the remote comput...

View Status Menus 55 A.4 V IEW S TATUS M ENUS 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. Main Menu After connecting to the Service Terminal Interface, the Main Menu appears, as shown below. T...

View Status Menus 56 A.4.1 View Active Alarms For details on this feature, see 5.1 - View Active Alarms . View Active Alarms ACTIVE ALARMS Input points/hardwarepresently in an alarm state DEVICE_1 ALARMCONTACT CLOSED 1=REFRESH ACTIVE ALARMS2=RETURN TO MAIN MENU SELECT A NUMBER:

View Status Menus 57 A.4.2 View Alarm Log For details on this feature, see 5.2 - View Alarm Log . View Alarm Log ALARM LOG Alarm history DEVICE_1 ALARMCONTACT CLOSED29-AUG-02 09:29:10 NO STANDBY AVAILABLE29-AUG-02 09:20:10 STANDBY DEVICE FAILED29-AUG-02 09:19:10 NO RESTART AVAILABLE29-AUG-02 09:19:1...

View Status Menus 58 A.4.3 View Event Log For details on this feature, see 5.3 - View Event Log . View Event Log EVENT LOG Event history SYSTEMUSER LOGIN07-MAY-02 10:29:10 DEVICE_1 HW FORCE ONCONTACT CLOSED07-MAY-02 09:50:10 DEVICE_4 FORCE OFFCONTACT OPEN07-MAY-02 09:20:10 DEVICE_3 AUTOCONTACT OPEN0...

View Status Menus 59 A.4.4 View Input Status For details on this feature, see 5.4 - View Input Status . View Input Status INPUT STATUS Input status from device INPUT STATUS DEVICE_1 NORMALDEVICE_2 ALARMDEVICE_3 EVENTDEVICE_4 ALARM 1=REFRESH INPUT2=RETURN TO MAIN MENU SELECT A NUMBER:1

Silence Alarm & Back Up Log Files (Service Terminal Interface only) 61 A.5 S ILENCE A LARM & B ACK U P L OG F ILES (S ERVICE T ERMINAL I NTERFACE ONLY ) This section presents two options from the Main Menu that are available via the Service Terminal Interface only. Main Menu After connecting...

Silence Alarm & Back Up Log Files (Service Terminal Interface only) 62 A.5.2 Back Up Log Files (Service Terminal Interface only) For details on this feature, see 6.2 - Back Up Log Files (Service Terminal Interface only) . Back Up Alarm Log File Back Up Event Log File Backup Log Files - Alarm Log...

Setup Menu 63 A.6 S ETUP M ENU The Setup menu allows the user to configure the AC4—setting up inputs, outputs and system fea- tures such as date and time, as well as operation options such as a rotation sequence and standy test- ing. This menu also provides a vehicle for manually changing the state ...

Setup Menu 64 Setup Menu This section presents Service Terminal Interface screens for each of the following: * Setup System Information features are: • Change Password• Set Date & Time/Automatic Daylight Saving Time• Setup Site ID• Backup and Upload Configuration File (Service Terminal Interface...

Setup Menu 66 A.6.2 Setup Common Alarm For details on this feature, see 7.4 - Setup System - Setup Common Alarm . Setup Common Alarm SETUP COMMON ALARM Select if the commonalarm relay contactis to reset withsilence alarm CURRENTSETTING N 1=SETUP COMMON ALARM2=RETURN TO SETUP MENU3=RETURN TO MAIN MEN...

Setup Menu 67 A.6.3 Setup Zones For details on this feature, see 7.5 - Setup System - Setup Zones . Setup Zones SETUP ZONES Select zones and number of devices in the zone ZONE # DEVICES 1=ZONE 1 2 2=ZONE 2 2 3=RETURN TO SETUP MENU4=RETURN TO MAIN MENU SELECT A NUMBER:1 ># DEVICES IN ZONE 1>[2]...

Setup Menu 69 A.6.5 Setup System Info This section presents Service Terminal Interface screens for choices 1 through 9 in the Setup System Information menu shown below. For details on this topic, see 7.7 - Setup System - Setup System Info . Change Password For details on this feature, see 7.7.1 - Ch...

Setup Menu 70 Set Date & Time/Automatic Daylight Saving Time For details on this feature, see 7.7.2 - Set Date & Time/Automatic Daylight Saving Time . Setup Site ID For details on this feature, see 7.7.3 - Setup Site ID . Set Date & Time SET DATE & TIME CURRENT DATE & TIME DST 28...

Setup Menu 72 Factory Defaults For details on this feature, see 7.7.5 - Factory Defaults . Backup & Upload Configuration File - Upload BACKUP AND UPLOAD CONFIGURATION FILE Backup from panel saves panel configurationsUpload to panel restores panel configurations Select to backup or upload file 1=...

Setup Menu 73 Firmware Update (Service Terminal Interface only) For details on this feature, see 7.7.6 - Perform Firmware Update (Service Terminal Interface only) . Firmware Update PERFORM FIRMWARE UPDATE This command will updatethe existing firmware 1=PERFORM FIRMWARE UPDATE2=RETURN TO SETUP SYSTEM...

Setup Menu 77 Restart Delay For details on this feature, see 7.8.5 - Specify Restart Time . Setup Operation - Restart Delay SETUP OPERATION Select operation to edit OPERATION STATE 1=AUTO SEQUENCING OFF 2=STANDBY TESTING OFF 3=FAILED STANDBY N 4=HOLD DELAY 10:00 5=RESTART DELAY 00:06 6=RETURN TO SET...

Setup Menu 79 A.6.8 Clear Alarms & Logs For details on this topic, see 7.10 - Clear Alarms & Logs . Clear Active Alarms For details on this feature, see 7.10.1 - Clear Active Alarms . Clear the Alarm Log For details on this feature, see 7.10.2 - Clear the Alarm Log . Clear Alarms & Logs ...

Setup Menu 80 Clear the Event Log For details on this feature, see 7.10.3 - Clear the Event Log . Clear Alarms & Logs - Clear the Event Log CLEAR ALARMS&LOGS Clear active alarmsor log records Select the log to clear 1=CLEAR ACTIVE ALARMS2=CLEAR ALARM LOG3=CLEAR EVENT LOG4=RETURN TO SETUP MEN...

The Company Behind the Products With over a million installations around the globe,Liebert is the world leader in computer protectionsystems. Since its founding in 1965, Liebert hasdeveloped a complete range of support andprotection systems for sensitive electronics: • Environmental systems—close-co...