2-3
SECTION 2
INSTALLATION
2-3 POWER UP PROCEDURES
The Internal Battery, if installed, charges automatically when the COM-120C is
connected to a power source and the Main Power Switch is set to ON.
The Power Supply is designed to sense applied ac voltage and compensate
automatically with no further action required.
2-3-1 APPLYING AC POWER
o Connect ac power cord to AC Input Connector.
o Plug ac power cord into power source. Insure proper grounding.
o
Set Main Power Switch to ON (“I” on switch).
Power APPLIED Indicator lights when power is available.
o
Press COM-120C Front Panel Power ON Key to activate Unit. Power ON Indicator
lights.
2-3-2 APPLYING EXTERNAL DC POWER
o
Connect dc power cord to DC Input Connector.
o
Properly connect non-terminated ends of dc power cord to a 10A current limited dc
power source.
Power APPLIED Indicator lights when power is available.
o
Press COM-120C Front Panel Power ON Key to activate Unit. Power ON Indicator
lights.
O
T
e
n
Before operating unit with 12 V supply, verify voltage level at
connector is 12 V or greater.
2-3-3 BATTERY POWER OPERATION (OPTION 01)
o
Press COM-120C Front Panel Power ON Key.
o
Power ON Indicator lights.
Option 01 required for battery operation.
Power cycles off after approximately 20 to 25 minutes of continuous operation.
Flashing Power ON Indicator denotes low battery charge.
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General