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6.8 Front Panel Layout (All Units)
Refer to the following illustration for the entire UPS front panel operating procedures.
line-1
line-2
line-3
line-4
INVAC IN
BYP
BATT
FAULT
MONI
BATT F1
IN OUT
BATT
TEST
BUZZ
STOP
MENU ENTER
RESET
EPO
STOP RUN
UPS
4200Series
ON-LINE
UNINTERRUPTIBLE POWER SYSTEM
4-line liquid
crystal display
screen (see
Section 6.9)
Emergency
power off switch
(see Section 6.6)
STOP/RUN key
switch
Green light emitting
diodes (LED)
(see Section 6.8)
Red light emitting
diode (LED)
(see Section 6.8)
12-key Data entry
keypad (see
Section 6.14)
Green light emitting
diodes (LED)
(see Section 6.11)
12-key Data entry
keypad (see
Section 6.17)
Red light emitting
diode (LED)
(see Section 6.11.1)
STOP/RUN key
switch
Emergency
Power Off switch
(see Section 6.9)
4-line liquid
crystal display
screen (see
Section 6.12)
6.9 EPO (Emergency Power Off) Function
These units are equipped with terminals for receiving an EPO (Emergency Power Off)
"closed contact" switch command from two locations: (1) a remote location and (2) from a
front panel mounted EPO switch. This safety feature enables quick shutdown of the UPS
AC output and battery circuits. Usually the EPO switch is installed in a central location that
is easily accessible to personnel concerned with the operation of the UPS and the
equipment connected to it. The EPO function is initiated by pressing the switch to the
closed "shutdown" position. The effect of using the EPO switch is the same whether the
UPS is in the AC Input Mode, Battery Backup Mode, or the Bypass Mode. See
'EMERGENCY OFF' screen. The following figure shows the UPS condition after
application of the EPO switch. Use the Start-up Procedure for restarting the unit.
Converter Inverter
Bypass
Charger/
Chopper
Isolating
XFMR
External
Batteries
Output
Power
MCCB
MBS
Input
Power
Power Flow
TRIPPED
OFF
OFF
OFF
4200FA CT/XT User’s Manual 42