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Table 21: 7450 ESS-1 Front Panel and LED Descriptions (Continued)
Key
Label/Part
DCE
4
(cont)
5
Alarm
6
ACO/LT
7
Status
Power Supply
Fan
Compact Flash
Alarms
7450 ESS-1
Sub
category
Flip the switch to DCE when connecting to the serial port of a PC with a
straight-through cable. When the switch is flipped to DCE, the console
port is acting as a data communications equipment (DCE) serial port.
The Alarm port is provisioned as a DB-9 serial port and is used to con-
nect to external alarm devices that report conditions that trigger red or
amber alarms.
The Audible Alarm Cutoff/Lamp Test button verifies the operability of
LEDs. When pressed, the LEDs should temporarily illuminate. This but-
ton also turns off all external alarm relay control bits until the next new
alarm condition. The LEDs blink when the button is depressed.
• Green: Operationally up and administratively up.
• Amber: Operationally down but administratively up.
• Amber (blinking): Qualified, but previously failed.
• Unlit: Not operational, shutdown, or administratively down.
• Green: Indicates that AC input power is present and operational.
1
• Amber: Indicates an error condition with the AC input power.
• Unlit: Indicates that the AC power supply is not installed or
recognized.
• Green: Indicates that DC input power is present and operational.
2
• Amber: Indicates an error condition with the DC input power.
• Unlit: Indicates that the DC power supply is not installed or recognized.
• Green: Indicates that the fans are operational.
• Amber: Indicates a fan failure.
• Unlit: Indicates that the fans are not operational.
• Green: Indicates that the flash card is operational and in a read or write
1,2,3
process.
Note: Do not physically remove or attempt to remove the flash card
when the LED is lit green.
• Amber (blinking): Error condition exists.
• Amber (solid): Indicates that the slot is in an operationally down mode.
This is the only mode to safely remove the flash card.
• Unlit: A flash card is not installed in the slot.
• Red: An overtemperature condition exists.
OT
If there are no OT conditions, this LED should remain off.
Appendix A: LEDs and Optics
Description
Page 83
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