Liebert AC4 User Manual

• Use the arrows to choose a character.
• Press Enter to advance to the next character position.
• When finished, press Enter again.
7.3.2 Define Input as Normally Open or Normally Closed
Each input may be set up as Normally Open (NO) or Normally Closed (NC).
The default setting for all input points is NO (Normally Open).
If you require an input to be a supervised point, define the input as
Normally Closed (NC).
• From the Setup Inputs Menu, choose Norm Open/Close, as
shown at right, and press Enter.
• To change the normal state for this input, use the arrows to
choose NO (Normally Open) or NC (Normally Closed), then press
Enter.
7.3.3 Define Input as Alarmable or Event
Each input may be defined as Alarmable
(AL) or as an Event(EV).
• For an input defined as alarmable,
a change in the status of the
device triggers these actions: the
LCD flashes, the audible horn
sounds, a record is entered in the
Alarm Log and the common alarm
relay is energized.
• For an input defined as an event,
a change in the status of the
device is recorded in the Event
Log.
For both types (alarmable and event), user setup determines output control—whether the device that
changed status is disabled or kept in operating mode and whether a standby device is set to operate.
By default, all inputs are set up as AL (Alarmable).
• From the Setup Inputs Menu, choose Alarm/Event, as shown at right, and press Enter.
• To change the type of input, use the arrows to choose AL (Alarmable) or EV (Event), then
press Enter.
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Liebert AC4 Specifications

General

Brand	Liebert
Model	AC4
Category	Control Unit
Language	English