S8VM Datasheet, PDF (12/37 Pages) Omron Electronics LLC – Switch Mode Power Supply

S8VM
■ Probable Causes of Power Supply Errors and Troubleshooting Using
Undervoltage Alarm Function
Check the following information if the Undervoltage Alarm Function operates.
Contact your OMRON representative if the Power Supply does not function normally after checking.
The symbols in the table are as follows:
: Lit, : Not lit, : Flashing
Note: Flashing: The output voltage is unstable, causing the LED to repeatedly turn ON and OFF.
DC ON
DC LOW1
DC LOW2
LED D:
Green
LED F:
Yellow
Transistor
outputs
(H to J)
LED G:
Red
Transistor
outputs
(I to J)
Output voltage
Power Supply status diagnosis
Normal
1
ON
ON
→
(approx. 90% min.
of rated output
Normal status
voltage)
Normal
The output voltage has re-
2
OFF
ON
→
(approx. 90% min.
of rated output
covered to normal status
following a previous sud-
24 V
voltage)
den voltage drop.
3
ON
OFF
Output drop
→
(approx. 90%
max. of rated
output voltage)
The output voltage has
dropped gradually and re-
mains low.
24 V
Output drop
The output voltage re-
4
OFF
OFF
→
(approx. 90%
max. of rated
mains low following a pre- ^{24 V}
vious sudden voltage
24 V
output voltage) drop.
5
OFF
ON
OFF
Output drop
→
(approx. 80% of
rated output
voltage)
The output voltage re-
mains low and is continu-
ing to fluctuate following a
previous sudden voltage
drop.
24 V
ON
Output drop
The output voltage has
6
ON
→
(approx. 80% of
rated output
dropped gradually, re-
mains low, and is continu-
24 V
OFF
voltage)
ing to fluctuate.
7
OFF
OFF → No output
No output voltage is being
output.
ON
ON
8
→ Unstable output
The output voltage is un-
stable.
24 V
OFF
OFF
12