User Manual

MBF, Multi Band Repeater
PRODUCT DESCRIPTION AND USER'S MANUAL
© Axell Wireless Ltd A 200 93 00, rev E 41 (105)
External Alarms
Alarm Code Description Trigger
External Alarm 1 EX1 Monitors any alarm source, for example fire
alarms or external door sensors connected to the
external interface.
Error from alarm
source
External Alarm 2 EX2 Monitors any alarm source, for example fire
alarms or external door sensors connected to the
external interface.
Error from alarm
source
External Alarm 3 EX3 Monitors any alarm source, for example fire
alarms or external door sensors connected to the
external interface.
Error from alarm
source
External Alarm 4 EX4 Monitors any alarm source, for example fire
alarms or external door sensors connected to the
external interface.
Error from alarm
source
Relay Output for Sum Alarm
The module for external alarms contains a relay output. The relay can be used to indicate the summary status
of the repeater. Each alarm source can be configured to be affecting the relay or not.
4.4.2 Alarms and End of Alarms
When the Control Module detects a failure in the repeater, an alarm is transmitted to the Axell Element
Manager, informing the operator about the error condition. When the alarm has ceased, an end of alarm is
sent to the AEM, stating that the alarm source is now OK.
For slave type repeaters in a OMU-repeater system this communication is initiated and managed by the
OMU.
Each “alarm” and “end of alarm” updates the AEM database with the latest status of the alarm source,
ensuring that the AEM operator always has the correct repeater status in the system.
 To generate an alarm a number of consecutive measurements must first show an error state. This can be
configured for each alarm source separately.
 To generate an end of alarm only one OK measurement is needed.
Alarm level
Time
Alarm threshold
Alarm is sent after three
seconds above threshold
End of alarm is sent as
soon as status is OK
If an alarm should constantly toggle between OK and ERROR the communications interface might be
blocked. To prevent this there is a parameter called Minimum Alarm Repetition Cycle. This parameter
defines how many minutes must elapse before a new alarm can be transmitted from the same alarm source.