version 4.7.2 – July 10th, 2022 Firmware version V2.1.7 and higher
EXXFIRE Installation and Service Manual 99
Operation of connected systems
When multiple system are connected in order to protect a larger volume, the systems must be
installed as described in section 4.5.3.
Each system must be configured as described in section 5. Note that DIP switches 2 to 7 only need
to be set on the Master system. Even if these DIP switches are set on a Slave system, these settings
will be overridden by the settings of the Master system. All other DIP switches and the rotary switch
must be must set on both the Master system and on all Slave systems.
During operation the Master system will collect status data from all Slave systems and determine
the overall system status and communicate this status back to all Slave systems. The FAULT, PRE-
ALARM 1 and 2, ALARM and GAS RELEASED status LEDs on all systems will show the overall system
status and the relay outputs of all systems will also reflect this overall system status.
Detailed fault information for all systems will be shown on the 4-digit display of the Master system,
where a Slave system will only show the detailed fault information of that particular Slave system.
Note:
- As a result a Slave system can show the general fault status (FAULT LED is ON), but no fault
code on its 4-digit display (this means that one of the other systems generated the fault
condition and the fault code will be visible on the 4-digit display of the system that
generated the fault and on the Master system)
If one of the systems generates an Alarm the Alarm status will be activated on all connected
systems and all systems will fire their generators and release the gas simultaneously (unless fire
extinguishing is blocked by an open Door Switch or DISABLED mode).
Muting of buzzers on all systems can be done by pressing the MUTE button on the UI panel of any
system.
A number of functions are only available at the Master system, but will have effect on all connected
systems:
- DISABLING the system (see section 7.6)
- Resetting an Alarm (see section 7.8)
- Starting a new commissioning cycle (see section 6.1)
- Resetting flow faults 2 and 3 (see section 7.9)
Lost RS485 connection:
The RS485 bus that connects the systems is constantly monitored. In case connection between
systems is lost, this will be detected by each of the systems and will result in the fault status to be
raised and signalled on the UI panel and communicated through the fault relay outputs of the
systems. The 4-digit display on the system will indicate fault code “bb” (communication fault).
Systems will continue to operate standalone in case of a communication issue. This could mean
that not enough gas will be released in the protected volume in case not all systems release their
gas.
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