7
3
F
EATURES
3.1
A
COUSTIC ALARM
The µ-FEP has an internal attention signal. Malfunctions are standard signalized with a continuous
tone signal, alarms with a pulsating tone signal. Deviating tone signalling takes place with
extinguishing activation and operation of the hold (extinguishing delay) function. The voltage of the
monitored output to drive an additional sounder/beacon is controlled by the µ-FEP and is
independent of the main power supply voltage. In case emergency power status, the sounder output
voltage reduces to 9 VDC what might affect the sound pressure level.
3.2
4
HOURS EMERGENCY POWER
To reach the maximum time of emergency power, it is important that the power consumption during
the emergency power status is as low as possible, but that all primary functions will remain active.
Replacing the LIR2477 battery every 3 years will prevent shortening the standby time and prevent
power down in case of increased power consumption during alarm state. When using the MODBUS
communication system, the emergency power capacity is reduced to 3.5 hours.
3.3
C
OMMUNICATION
The µ-FEP has a Modbus network connection. Modbus enables communication among devices
connected to the same network. A Modbus network consists 1 master and a maximum of 247 slave
units, each with a unique address. For more information, see the MODBUS user manual.
3.4
E
XTINGUISHERS TERMINAL BOARD
(
µ
-ETB)
The µ-FEP has as an extra option a special for aerosol extinguishers developed junction box.
See chapter 18 for more details.
3.5
H
ISTORIC EVENT LOG
The µ-FEP has an historic event log
memory of 10000 events readable from a
USB port. Connect an USB cable between
the Mini-B USB port and your computer.
The device will act as an USB stick.
You operating system will create a new
disk station. The files on the disk station
are text files with logged event. Each time
the µ-FEP reboots, a new file is created
with a new batch number in the filename.
Buttons press events, detailed fault
indication and relay switching events are
logged in the text files.
