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6.3 Cautions
Cautions on design
•
Never connect in serial nor parallel the DC output terminals of the FX
power supply unit.
Such a connection may damage the unit.
Never connect the FX
FX
-20PSU
2N
24+ 24-
Never connect the FX
FX
-20PSU
2N
24+ 24-
7. TROUBLESHOOTING
When it is suspected that the FX
•
Check the POWER LED status.
[When the POWER LED is extinguished]
-
Check the input voltage of the FX
If any abnormality is detected → Input the specified supply voltage.
-
Disconnect the wiring from the output terminals "24+" and "24-".
If the POWER LED lights → The overcurrent protection circuit (See Section 4) is actuated.
Investigate the load connected to the output terminals.
If the POWER LED remains extinguished → The overvoltage protection circuit (See Section 4)
may be actuated. Ask for inspection and repair.
[When the POWER LED is lit]
-
Check the input voltage of the FX
If any abnormality is detected → Input the specified supply voltage.
-
Check the external wiring.
If any abnormality is detected → Correct the wiring (See Section 6).
•
The overcurrent protection circuit and the overvoltage protection circuit are built in the FX2N-20PSU.
If such a protection circuit is actuated, the output voltage drops or is shut down. For details, refer to
Section 4.
HEAD OFFICE : MITSUBISHI DENKI BLDG MARUNOUTI TOKYO 100-8310
HIMEJI WORKS : 840, CHIYODA CHO, HIMEJI, JAPAN
JY992D85101A
-20PSU in parallel to another power supply unit.
2N
FX
-20PSU or
2N
another power
supply unit
-
+
-20PSU serially to another power supply unit.
2N
FX
-20PSU or
2N
another power
supply unit
-
+
-20PSU is not normally operating, check the following items.
2N
-20PSU.
2N
-20PSU.
2N
Manual number : JY992D85101
Manual revision : A
Date
FX
-20PSU
2N
24+ 24-
FX
-20PSU
2N
24+ 24-
: FEB. 2000
TELEX : J24532 CABLE MELCO TOKYO
-20PSU to another
2N
FX PLC
Service power
supply
24V
0V
FX PLC
Service power
supply
24V
0V
Effective FEB. 2000
Specifications are subject to
change without notice
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