Power Supply LED Display
Original instructions
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Introduction
The status and performance of the Modicon X80 power supplies are monitored and reported through the LED display on the front of the module.
LED Status for Standalone Power Supply
All standalone power supply modules have a (green) OK LED. It indicates this diagnostic information:
LED
Status Indication
OK
ON
Module operations are normal.
OFF
One of these conditions exists:
  • The rack power supply output voltage is below the threshold.
  • The RESET button is pressed
The BMXCPS2000, BMXCPS3500, and BMXCPS3540T power supplies also have a (green) 24 V LED, which indicates this diagnostic information:
LED
Status Indication
24 V
ON
Module operations are normal.
OFF
The 24 Vdc sensor voltage from the power supply is not present.
LED Status for Redundant Power Supply
The redundant power supply module has (green) LEDs that indicate these diagnostic information:
LED
Status Indication
OK
ON
Module operations are normal, that is:
  • The rack power supply output voltages are in the acceptable range, and
  • The RESET button is not pressed
OFF
The RESET button is pressed
Blinking
The RESET button is not pressed and one of the rack power supply output voltages (24 Vdc or 3.3 Vdc) is below the threshold.
ACTIVE
ON
The power supply performs the role of master and the RESET button is not pressed.
OFF
The power supply performs the role of slave or the RESET button is pressed.
RD
ON
The redundancy functionality is operational:
  • The power supply module is installed in a redundant configuration (with another redundant power supply that operates normally in the same redundant power supply rack), and
  • The rack power supply output voltages of both redundant power supply modules are in the acceptable range, and
  • The communication between both redundant power supplies through the backplane is operating, and
  • None of both RESET button are pressed.
OFF
One of these conditions exists:
  • The power supply module is installed in a redundant configuration but the other redundant power supply is not operating.
  • The power supply module is installed in a standalone configuration (without another redundant power supply in the rack).
  • The 24 Vdc output voltage of the power supply is out of range.
  • The 3.3 Vdc output voltage of the power supply is out of range.
  • Communication through the backplane is interrupted.
  • The RESET button is pressed.
Blinking
The redundancy current measurement failed.
The power supply module is installed in a redundant configuration but one of these conditions exists:
  • The current capability on the 24 Vdc output voltage of at least one of the redundant power supplies is insufficient.
  • The current capability on the 3.3 Vdc output voltage of at least one of the redundant power supplies is insufficient.