Open Ended Network Option
Up to 64 Syncro and Syncro AS control panels
can be networked using a secure, fault tolerant
2-core RS485 data loop.
The networking capability is provided by the
addition of an S555 network driver card into
each Syncro or Syncro AS control panel. This
card not only provides the networking facility,
but also acts as a network data booster and
network cable isolator to guarantee consistent
operation of the network, even if there is
a single cable fault on the network data loop.
Any single cable short circuit or open circuit
will be reported to all panels on the network
as a network cable fault from the two panels
at either side of the damaged section. In
addition, the network card has two “link
healthy” indicators for the data in
/ data out links to provide further information
to the service engineer. Therefore it is a
simple exercise to quickly identify the damaged
cable on the Syncro network.
Whenever there is a single cable fault on
the network, the network data is passed back
and forward between the panels on the remaining
cables, thus preserving the integrity of the
network messaging and sharing of information
The predecessor to the Syncro, the Signifire
control panel, also supported networking,
by using a multi-drop cable configuration.
This product did not require a loop configuration
and as a result was more vulnerable in the
event of a cable fault – in particular
a short circuit.
With the increasing difficulty in sourcing
the Signifire core components, it is generally
recommended that the Signifire product is
replaced with the Syncro control panel where
possible. For existing Signifire networks,
it is not always easy to install additional
network cables to provide the network loop
required by the Signifire product.
We have therefore developed the facility
on the Syncro network to allow these products
to be connected in an open-ended network,
for these retrofit applications. Loop Explorer
allows the user to configure the start and
end panel on the open-ended loop and by using
the appropriate firmware in all panels on
the network; the open circuit network faults
will be suppressed.
This facility will be provided as part of
the panel enhancements, which will be released
in the coming weeks. These enhancements also
include support for new devices from Hochiki
& Apollo as well as cause and effects
using zones on particular nodes and a zone
Please contact any member of the Technical
Support or Customer Service departments if
you require additional information.
Download the Syncro manual:
Syncro AS manual:
Syncro Networking manual: