Rear Panel

Item

Component

Description

1

Cover screws

Loosen the screws to remove the appliance cover.

2

ESD grounding point

When servicing the appliance, connect an ESD strap to this point.

3

Alarm Off button for power supply units

If a power supply cable is not connected to the outlet, an alarm sounds continuously.

Press this button to turn off the alarm.

Note that this button is functional immediately after you power up the appliance.

4

Grounding lugs

Used to connect grounding.

5

LED indicator for each power supply unit

  • Off - No power cord is connected to any of the PSUs in the system.

  • Green - System on.

  • Blinking green - Power cords are connected to all PSUs, but the system is off.

  • Amber - No power cord is connected to the PSU, but other PSUs in the system have a power cord connected.

  • Blinking amber - Warning about a hardware issue (high temperature, high power, high current, slow fan) that might lead to an issue with the PSU.

  • Blinking fast green - PSU in Firmware update.

6

Power supply units

Dual redundant power supplies that you can hot swap. Each power supply unit connects to an electric outlet.

You can use the cable restraints to avoid accidental removal of the power supply cable.

In QLS250 appliances - The PSUs are numbered from top to bottom in the Gaia OS as Power Supply #1 and Power Supply #2.

In QLS450, QLS650, and QLS800 appliances - The PSUs are numbered from top to bottom in the Gaia OS as Power Supply #1 (top), Power Supply #2 (middle), and Power Supply #3 (bottom).

In MLS200 and MLS400 appliances - The PSUs are numbered from left to right in the OS as Power Supply #1 and Power Supply #2.

See PSU Configuration and Monitoring.

7

Thumb screws for cooling fan unit

Loosen the screws to remove the cooling fan unit from the appliance.

8

Cooling fan units

In QLS250 appliances - Units are numbered from right to left: 1, 2, 3, 4.

In QLS450, QLS650, and QLS800 appliances -Units are numbered in stacks of two (one inner and one outer) for a total of 8 fans. When checking the hardware sensors in the CLI, they are referred to as 1-4 inside and 1-4 outside. See Cooling Fan Units Naming Convention.

In MLS200 appliances - Units are numbered from right to left: 1, 2, 3, 4.

In MLS400 appliances - Units are numbered from right to left: 1, 2, 3, 4, 5.

9

Location LED

  • Off - Location beacon is turned off.

  • Blinking blue - Location beacon is turned on through the Gaia Portal or Gaia Clish.

  • Solid blue - Location beacon is turned on through the Locator button.

Note - Turn off the Location LED the same way you turned it on.

10

Main power switch

When the appliance is turned off, this turns the appliance on.

When the appliance is turned on, pressing and releasing the switch starts an orderly shutdown process. Alternatively, holding the switch for 4 seconds forces a machine shut down.

Cooling Fan Units Naming Convention

In QLS450, QLS650, and QLS800 appliances, when checking the hardware sensors in the Gaia Portal or Gaia Clish, note that the cooling fans use a different naming convention.

Use the below table to identify each of the 8 fans.

Gaia Portal

CLI

System Fan #1

System Fan 1 Inside

System Fan #2

System Fan 2 Inside

System Fan #3

System Fan 3 Inside

System Fan #4

System Fan 4 Inside

System Fan #5

System Fan 1 Outside

System Fan #6

System Fan 2 Outside

System Fan #7

System Fan 3 Outside

System Fan #8

System Fan 4 Outside

Using the Power Cable Restraint on QLS250, QLS450, QLS650, QLS800, and MLS400 Appliances

You can use the power cable restraint to prevent accidental removal of the power cable.

Legend

Item

Description

1

Restraint anchor

2

Cable loop

3

Restraint strip tab

4

Restraint strip

The image below is for the QLS250 appliance, but installing the power cable restraint is the same for the MLS400 appliance.

Legend

Item

Description

1

Restraint strip slot

2

Power supply inlet

Legend

Item

Description

1

Restraint strip slot

2

Power supply inlet

  1. If a power cable is connected to the power supply inlet, disconnect it.

  2. Find the restraint strip slot on top of the power supply inlet.

  3. Make sure that the cable loop on the restraint faces the power supply inlet.

  4. Insert the restraint strip anchor into the slot until it snaps and locks.

  5. Connect the power cable to the power supply inlet.

  6. Pull the restraint tab to the side to move the cable loop on the restraint strip.

  7. Move the cable loop until you can put it around the power cable as shown in the next figure.

  8. Insert the open side of the cable loop into the loop slot until it is tight against the power cable.

  9. Make sure the cable loop is secured and the power cable cannot be removed.

The MLS200 appliances have a power cable restraint clip attached to the power supply unit (PSU). Use the restraint clip to prevent accidental removal of the power cable.

  1. Make sure the restraint clip is in the open position (upward).

  2. Connect the power supply cable to the power supply inlet on the PSU.

  3. Push down on the restraint clip to close it and secure the power supply cable.

Legend

Item

Description

1

Restraint clip in the open position (upward)

2

Restraint clip in the closed position