Fan Tray Leds; Table 56 7750 Sr-A -48 Vdc Psu Description - Alcatel-Lucent 7750 SR-a4 Installation Manual

Fan Tray LEDs

Key Part
1 Handle
2 Fan
3 Ground terminal
4 Power connector screw
5 Power connector screw
6 LED
7 Latch lock
Fan Tray LEDs
140
Table 56: 7750 SR-a –48 VDC PSU Description
Description
Used to remove power supply after the latch (Key 7) is unlocked
Cooling fan for the PSU
M4 screw
Left terminal stud (Batt terminal) for connection to –48 VDC battery cable
Right terminal stud (RTN terminal) for connection to 0 VDC return cable
Unlit: The DC power input is below the specified minimum to turn on the
PSU.
Green (slow blink): The PSU is in standby mode. Standby output is
operating within normal parameters. The main output is disabled.
Green (solid): The standby and main outputs are operating within normal
parameters.
Yellow (slow blink): A warning condition has been detected on the PSU.
Yellow (solid): A fault condition has been detected on the PSU.
Red (solid): An incorrect PSU has been inserted in the shelf.
Secures the PSU in place. Press the latch lock to the left to unlock the PSU.
You must supply your own DC power cables. Verify that they are compliant with your local
safety code. PSUs have no field-replaceable parts. You must replace the entire unit in the
event of a failure.
Refer to Installing, Wiring, and Connecting a –48 VDC PSU on page 98
information regarding preparing DC power cables.
Fan trays are chassis-specific.
• The 7750 SR-a4 5-RU chassis requires the SR-a4 fan tray, which houses four axial
fans.
• The 7750 SR-a8 7-RU rack requires the SR-a8 fan tray, which houses six axial fans.
7750 SR-a4 and SR-a8 Installation Guide
for requirements and