User Manual

Chapter 2: Controls and Indicators

The AC normal (Green) LED will be on when the UPS is operating in

the normal AC mode and will turn off when the UPS is operating in

the Battery mode.

The On-Battery (Yellow) LED will turn on when the UPS is operating

in the Battery mode and will turn off when the UPS is operating in the

AC normal mode.

The Warning / Fault (Red) LED will turn on when the UPS detects an

internal fault, an Overload, a Weak/Bad/Disconnected Battery or a

Low Battery Warning. The LED will be off when the UPS is operating

normally.

The On/Off Button functions as follows:

When the UPS is in the Off position, press and hold the On/Off

button until the alarm sounds one beep and then release to turn the

UPS On.

When the UPS is in the On position, press and hold the On/Off

button until the alarm sounds one beep and then release to turn the

UPS Off.

When the unit is operating in Battery mode, pressing the Alarm

Silencer Button will silence the audible alarm. Once the UPS reaches

the LBW (Low Battery Warning) threshold the alarm will start beep-

ing. The alarm cannot be silenced during the LBW alarm. Once

the UPS transfers back to the AC normal mode the alarm will reset

back to the default setting.

Output Power Receptacles

NEMA 5-15P W/4 ft cord

Model # Input Power Cord

4 - NEMA 5-15R Battery Backup & Surge

4 - NEMA 5-15R Surge Only

1. Alarm Silencer Button: Silences the alarm during the Battery mode.

2. Battery Backup & Surge output receptacles: Mission critical equipment.

3. Input circuit breaker: Protection against an excessive overload.

4. AC normal (Green) LED.

5. On/Off Button: Turns the UPS On or Off.

6. On-Battery (Yellow) LED.

7. Warning / Fault (Red) LED.

8. Input power cord: Connecting to Utility Power.

9. Surge-only output receptacles: Noncritical equipment.

10.USB Communications Port (EN550 only): UPS monitoring and control.

11.RJ11/45 Single line Phone/Network protection port.

EN350

EN550

NOTE: See the LED and Alarm functions table for more information.

NOTE: With the exception of the On-Battery alarm all the other Warning/Fault

alarms cannot be silenced. Once the Warning/Fault condition has been cor-

rected the alarm will reset to default.