Bosch Plena Operating Manual page 126

126 en | Appendices
Clause / Requirement
In addition to individual fault identification
at these locations, a common sounder shall
sound for a minimum of 0,5 s every 5 s. A
fault shall cause the sounder to operate in
a latched mode and a visual indicator to
light, either steadily, or in a flashing mode.
Manual acceptance and reset switching
shall be included. When accepted, the
sounder shall be silenced and the indicator
shall change to (or remain in) steady
illumination. The occurrence of a further
fault condition shall reactivate the sounder
and the visual indicator. When all the faults
have been cleared, the indicator shall be
switched off, either automatically or by
operating a reset switch.
The fault indication should be given within
100 s of the occurrence of the fault,
regardless of whether the voice alarm
system is being used for non-emergency
purposes, such as the transmission of
background music.
5.4 Monitoring of software controlled
equipment
The correct execution of the system
software by any microprocessor shall be
monitored by internal self-checking
procedures and by an appropriate
monitoring circuit (e.g. "watch dog" circuit)
complying with the following:
a The monitoring circuit and its
b The monitoring circuit shall monitor the
2013.07 | V2.0 |
associated indication and signalling
circuits shall not be prevented from
determining and signalling a fault
condition by the failure of any
microprocessor or associated clock
circuits.
execution of routines associated with
the main program elements (i.e. it shall
not be solely associated with "waiting"
or other "housekeeping" routines).
Installation and Operation manual
Compliance
Compliant. Fault identification
and sounder is part of the
controller.
Compliant.
Compliant.
Compliant. Fault is indicated on
the controller and router.
Configuration must be set up to
supervise this.
Plena
Signature
Bosch Security Systems B.V.