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3.4.4 Power Supply Unit and the Wiring
Use an Insulated Power Supply with a Built-in Protection Circuit
•
Use an insulated power supply unit with a built-in protection circuit. The LightPixAE20 power supply
unit is a non-insulated circuit. Therefore, applying an abnormal voltage might damage the internal circuit.
If you use a power supply unit without a protection circuit, supply power through a protective device
such as a fuse.
•
When supplying power to the LightPixAE20, do not commonly use the power source for powering the
device and be sure to install a protection circuit such as a fuse.
Use a Power Supply Unit with Sufficient Capacity
•
When the power is turned on, the current far above the rated current temporarily flow. Use the power
supply unit with enough capacity (more than 1A). Check the operation of the device when actually
turning the power on.
Increase Resistance to Noise
•
Separate the wiring systems for the LightPix AE20 main unit, input devices, and output devices with
each other.
•
When there is a particular concern about noise coming from input/output circuits, it is recommended
that the power source for the LightPixAE20 and for input/output should be separately supplied.
Turn the LightPixAE20 ON/OFF at the Primary Side
•
Turn the LightPixAE20 on/off at the primary side (100 V AC). If you turn the device on/off at the
secondary side (24 V DC), the fuses of the device may melt down.
Consider the Electric Power Sequence
•
Consider the power supply sequence so that the power supply unit for the LightPixAE20 can be turned
off before the one for the input/output is turned off.
•
If you turn the input/output power off before turning the LightPixAE20 off, the device will detect a
change in the input signal level and may malfunction.
•
When powering on the LightPixAE20 again, wait at least 10 seconds after powering off the device.
About Momentary Power Interruptions
•
If momentary power interruption is less than 10 ms, the LightPix will perform continuous running.
•
If momentary power interruption is between 10 and 70 ms, the device may perform continuous running
depending on the condition but the device may reset itself.
•
If momentary power interruption is more than 70 ms, the device will reset itself. When power is
supplied again, the device will begin to operate from its initial state.
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