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MX2020 DC and Power Supply Module LEDs

 

Each DC PSM (-48 V and 240 V China) faceplate contains four LEDs. These LEDs are described in Table 1. Eighteen bicolor LEDs labeled 0 through 8 for the bottom nine PSMs, and 9 through 17 for the top nine PSMs, are located in the center of the craft interface.

The primary input of the PSM is a dual redundant feed, INP0 and INP1. Both feeds are active during operation, but both feeds may or may not be providing current. In addition, a PSM failure triggers the alarm LED on the craft interface.

Table 1: MX2020 DC Power Supply Module LEDs

Label

Color

State

Description

PWR OK

Green

On

PSM is functioning normally with no alarms.

Yellow

On

PSM controller is functioning normally.

Off

PSM is not functioning normally or the PSM controller is off.

FAULT

Red

On

PSM is not functioning normally or the DC input voltage of one or more feeds is out of range.

Off

PSM is functioning normally or both the DIP switches are set to off.

INP0

Green

On

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

Yellow

On

DC input is detected but voltage is out of range.

Off

DC input to the PSM is not present.

INP1

Green

On

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

Yellow

On

DC input is detected but voltage is out of range.

Off

DC input to the PSM is not present.