MX2020 DC 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 |
|---|---|---|---|
| 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. | |
| 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. | |
| 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. | |
| 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. |