Panasonic HL-C2 Series, Руководство пользователя, Страница: 13 / 278

Preface
11
Power Supply
■ Power Supply
• Select a power supply with a ripple 0.5V or less (P-P) and a current capacity 2A
or more.
• When using a commercial switching regulator, be sure to ground the frame
ground (F.G.) terminal to avoid the influence of high frequency noise.
• When using a transformer in the power supply, be sure to use an insulated
transformer. The product or the power supply may be damaged if an auto
transformer is used.
• Use an insulated power supply that incorporates a protective circuit to protect
against abnormal voltages from the power line.
• When using a power supply that does not incorporate a protective circuit, be
sure to supply power through a protective element such as a fuse.
■ Power Supply Sequence for Controller
• Arrange the power supply sequence so the controller turns off prior to the I/O
power.
• If the I/O power turns off prior to the controller, the controller detects the change
in level of input signals and this may cause wrong operation.
• Leave an interval for at least 10 seconds between turning off the controller and
turning on the power again.
• It takes about 40 to 50 seconds from power-on to operating state (start up
completed), depending on the settings saved. No outputs are determined
during startup. Do not output anything during the period.
• During startup, -10.8V of analog voltage and -5mA of analog current are output.
• Do not turn off the power while saving the settings. In the worst case, the
system of controller is destroyed and may fail to restart.
Instantaneous Power Failure
If an instantaneous power failure occurs, the system operates continuously, or
goes to the same state as power-on state, depending on the duration of power
failure. Do not use the system in the environment where an instantaneous power
failure occurs.