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MX2020 AC Power Supply Module LEDs

 

Each AC PSM faceplate contains four LEDs. These LEDs are described in Table 1. There are a total of eighteen bicolor LEDs located in the craft interface, and are labeled 0 through 8 for the bottom nine PSMs, and 9 through 17 for the top nine PSMs. Both feeds are alive during operation, but only one feed provides current. In addition, a PSM failure triggers the red alarm LED on the craft interface.

Table 1: MX2020 AC Power Supply Module LEDs

Label

Color

State

Description

PWR OK

Green

On

Power is functioning normally with no alarms.

Yellow

On

PSM controller is functioning normally.

Off

PSM is not functioning normally or the AC input voltage is out of range.

FAULT

Red

On

PSM is not functioning normally or the AC input voltage is out of range.

Off

PSM is functioning normally.

INP0

Green

On

AC input is within the required voltage range and the DIP switch is set to on.

Yellow

On

AC input is out of the required voltage range.

Off

AC input to the PSM is not present.

INP1

Green

On

AC input is within the required voltage range and the DIP switch is set to on.

Yellow

On

AC input is out of the required voltage range.

Off

AC input to the PSM is not present.