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2-3
POWER UP PROCEDURES
The Inter nal Batter y, if installed, char ges automatically when the CO M- 120C is
connected to a power sour ce and the Main Power Switch is set to O N.
The
Power
Supply
automatically with no fur ther action r equir ed.
2-3-1
APPLYING AC POWER
o
Connect ac power cor d to AC Input Connector .
o
Plug ac power cor d into power sour ce. Insur e pr oper gr ounding.
o
Set Main Power Switch to O N ( "I" on switch) .
Power APPLIED Indicator lights when power is available.
o
Pr ess CO M- 120C Fr ont Panel Power O N Key to activate Unit. Power O N Indicator
lights.
2-3-2
APPLYING EXTERNAL DC POWER
o
Connect dc power cor d to DC Input Connector .
o
Pr oper ly connect non- ter minated ends of dc power cor d to a 10A cur r ent limited dc
power sour ce.
Power APPLIED Indicator lights when power is available.
o
Pr ess CO M- 120C Fr ont Panel Power O N Key to activate Unit. Power O N Indicator
lights.
e
2-3-3
BATTERY POWER OPERATION (OPTION 01)
o
Pr ess CO M- 120C Fr ont Panel Power O N Key.
o
Power O N Indicator lights.
O ption 01 r equir ed for batter y oper ation.
Power cycles off after appr oximately 20 to 25 minutes of continuous oper ation.
Flashing Power ON Indicator denotes low battery charge.
is
designed
to
sense
Befor e oper ating unit with 12 V supply, ver ify voltage level at
connector is 12 V or gr eater .
applied
ac
voltage
2-3
SECTION 2
INSTALLATION
and
compensate
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