Emerson AC4 Manuale Utente

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 Zones
• Setup Outputs
• Setup System Info
• Setup Operation

The Liebert AC4 has four digital input points that may be configured 

individually. These inputs may have a wide variety of Liebert or other 

manufacturers’ equipment connected.
To configure a digital input:

• From the Main Menu, use the arrows

↑↓

 to

 

choose System and 

Control, then press Enter ↵ (see 7.1 Login for help).

• Enter your password at the Login screen.
• From the System and Control Menu, use the arrows

↑↓

 to

 

choose 

Setup System, then press Enter ↵.

• From the Setup System Menu, shown at right, use the arrows

↑↓

 to

 

choose Setup Inputs and 

press Enter ↵.

• From the Select Input Menu, choose an input—for example, Device_1—and press Enter ↵.

Table 13 shows the digital input features you may change, along with the default settings: you may 

change the name of the input, define it as normally open or closed, and specify it as alarmable or as an 

event.

• Alarmable inputs may be defined as either Unlatched or Latched.
• Event status allows you to monitor a digital input’s state—and use a change in state to initiate an 

action through an output, if desired—without triggering an alarm. Events are always Unlatched.

• You may also specify a time delay before the Liebert AC4 responds to an alarm or event.

Use the steps following Table 13 to change the default settings for any digital input.
Table 13

LABEL

Any name (up to eight characters)

NORM OPEN/CLOSE

NO (Normally open)

NC (Normally closed)

ALARM/EVENT

AL (Alarmable)

EV (Event)

LATCHED

L (Latched) / Y (Yes)*

NL (Unlatched) / N (No)*

DELAY

00:01 (1 second)

Any time (in minutes and seconds) from 00:00 to 99:59

* NOTE: Different abbreviations are used to designate a digital input as Latched or Unlatched as shown below.

Settings - Select Input Menu
(see Section 7.3)

When configuring an input
(see Section 7.3.4)

Unlatched

NL (Not Latched)

N (No, not latched)

Latched

L (Latched)

Y (Yes, latched)

SETUP COMMON ALARM
SETUP ZONES

↑↓=NEXT

↵

=SELECT

SETUP OUTPUTS
SETUP SYSTEM INFO
SETUP OPERATION

SELECT INPUT

DEVICE_2  NO-AL-NL

↑↓=NEXT

↵

=SELECT

DEVICE_3  NO-AL-NL
DEVICE_4  NO-AL-NL