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7 Installing the Electronic Door Lock System
7.4 Connecting the Power Cable of the CCU
•
To ensure personnel and equipment safety, before powering on the device, check whether condensation exists in the
cabinet. Power on the device only after you ensure that no condensation exists. For how to remove condensation, see
the related label on the cabinet front door.
•
During the power-on, before and after turning on each circuit breaker for the first time, you must use a multimeter to
check the input and output voltages and ensure that the voltages are normal (normal DC voltage range: –36 V DC to –
72 V DC).
Turn off the circuit breaker of the output terminal (reserved for the CCU) on the DC PDB or power system(LOAD2).
Connect one end of the CCU power cable to the RTN(+)\NEG(-) port on the CCU control board, and connect the other
end to the power system(LOAD2) or the output terminals of the DC PDB.
Turn on the circuit breaker on the power system that controls the power supply to the CCU.
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