Alarm Led On G4Ai; Alarm Led On O4Le; Alarm Led On Rf Hybrid And On Rf Combiner; Alarm Relays - ABB ETL600 Instruction Manual

ABB Switzerland Ltd
LED
RDY
U
SYS
LNK
HW
P4LT
Table 9-3
9.3.8.2.2.

Alarm LED on G4AI

The G4AI alarm LED (red) lights when a hardware alarm or an
interface alarm has been detected on the board.
9.3.8.2.3.

Alarm LED on O4LE

The O4LE alarm LED (red) lights when a hardware alarm has been
detected on the board (There are no interface alarms for the O4LE
board).
9.3.8.2.4.

Alarm LED on RF hybrid and on RF Combiner

These red LEDs signal a Tx level alarm. They light up if the level of the
RF transmit signal is lower than an adjustable threshold.
9.3.8.3.

Alarm relays

Electromechanical relays are specially suited for alarms because
closed relay contacts can signal an alarm even if the system is not
powered. There are alarm relays on the following boards: P4LT,
R1BC, G4AI, O4LE.
9.3.8.3.1.

Alarm relays on P4LT

The three alarm relays on P4LT are equipped with switchover contacts
and controlled by three top-level alarms:
•
SYSTEM or CABINET alarm,
•
HARDWARE alarm,
•
LINK alarm.
The relays are de-energized if the respective alarms are present.
9-10
1KHW001489-EN
Colour Description
Lights continuously while the system is in
normal operating condition.
Green:
Otherwise it is flashing.
Lights up when the top-level Warning is
Yellow
active.
Lights up when the top-level SYSTEM alarm
Red
is active.
Lights up when the top-level LINK alarm is
Red
active.
Lights up when the top-level
Red
HARDWARE alarm is active.
Lights up when P4LT hardware alarm or
Red
P4LT interface alarm is active.
The six LEDs on the frontplate of P4LT
November 2005
ETL600
Troubleshooting