Power Supply Troubleshooting
When the PWR LED is ON, the CLICK PLC is receiving enough power for operation. Verify
the power input voltage at the bottom connector on the PLC unit; the input voltage should
be 20β28 VDC.
The input voltage measures less than 20VDC
Remove the bottom connector from the CLICK PLC unit and measure the voltage again.
If the voltage at the connector then measures more than 20VDC, the power supply cannot
provide enough current for the CLICK PLC. Replace the power supply with a higher output
current power supply. Check the power budget to determine the current required from the
power supply (see below).
If the voltage still measures less than 20VDC with the connector removed from the PLC,
and the power supply voltage is not adjustable, then the power supply cannot be used for the
CLICK PLC. Replace the power supply with another one.
The input voltage measures greater than 28VDC
If the output current of the power supply is adjustable, decrease the output voltage. If the
output voltage cannot be lowered to less than 28VDC, replace the power supply with another
one.
How to check the power budget
You can use the programming software to check the power budget of the CLICK PLC:
β’ Connect the PLC to a computer running the CLICK programming software.
β’ From the software menus, connect the software to the
PLC by selecting PLC and Connect...
β’ From the software menus, select Setup and System Conο¬guration...
β’ The System Conο¬guration Setup window opens, and displays the Power Budget
in milliamps (mA) required by the PLC system. The PLC power supply must
be capable of providing more current than the Power Budget amount.
CLICK PLC Hardware User Manual, 6th Edition, Rev. F β C0-USER-M
6β5
Chapter 6: Troubleshooting
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