Voyager 3000 User Guide
3-6
Each slave EMU will have the same data available to the Master and Host as is shown in
Table 3-4 and Table 3-5. Table 3-6 shows a summary of the status that is monitored by the
EMU.
Connection
Status monitored
Method used
FANS
Connected
Loopback circuit.
Speed OK
Squarewave proportional to speed.
PSU
Connected
Loopback circuit.
Voltage Good
Valid if both 12V and 5V good
signals are active. Voltages
monitored internally by the PSU.
Temperature
Within range
Temperature trip points set in
o
C by
EMU circuitry.
SCSI Devices
Connected
IDs
Loopback circuit.
Read ID settings serially from
backplane.
Battery Backup or
UPS
On Battery Power
2 Minute reserve
warning
Internal and external logic level
connectors.
Interpreting the EMU LED Feedback
When a failure occurs an audible alarm will sound from the buzzer and the EMU LED will
flash at regular intervals. Table 3-7 shows how to recognize failures.
No of Flashes
Interpretation
1
Fan One Failure
2
Fan Two Failure
3
Fan Three Failure
4
Fan Four Failure
5
Alarm Temperature
5
Critical Temperature reached or exceeded
If a device failure occurs then the bottom light indicator will display RED indicating which
device has failed. If a Power Supply failure occurs then the indicator will display RED.
The Silence Switch is used only to silence the alarm buzzer - it does not stop the error LED
from flashing. Multiple failures are shown as multiple sequences of LED flashes, for example
if the first two fans fail, then the LED will flash once, followed by two flashes and it will
continue to display this sequence.
Table 3-6 Devices/events monitored by the EMU
Table 3-7 Interpreting the EMU LED feedback
