Edition 60 February 2013

Open Connect Points capacity update



The Open Connect product provides a simple means of integrating Apollo protocol Syncro or Syncro AS fire panel networks with a wide range of Building Management Systems (BMS), using commonly used communication protocols.

Open Connect allows the rapid deployment of the BMS interface by means of an embedded web application. This allows the fire system events to be passed to the BMS to be easily selected and for the gateway between fire and BMS systems to be quickly built, without expensive and time consuming specialist building integration engineering.

The Open Connect product is available in four different interface capacity options, with support for three BMS protocols (LonWorks, BACnet andModbus) via a number of different transport protocols.

It has been identified that there was an error in the technical details of the BMS points capacity for the four models. As a result the product datasheet, product manual and the BMS points calculator application have been updated and published.

The current and corrected items may be downloaded using the links below

Open Connect Datasheet

Open Connect Manual

Open Connect Points Calculator Application


Syncro Firmware Release V6.40


As part of the ongoing product improvements, there have been a number of minor firmware updates to the Syncro and Syncro AS panels since the last major release of V6.30 in October 2011.

In order to re-align all the protocol and panel variants, a major firmware release took place in January 2013 and all Syncro and Syncro AS panels are now supplied with V6.40 firmware.

Click here for details of the revisions included in the update

The current Syncro firmware files may be downloaded from the Kentec website.



Syncro AS Panel remote power connections



The Syncro AS control panel includes an on-board 3 Amp EN54-4 approved power supply unit.

Supplied via a transformer and bridge rectifier fitted in the rear of the panel enclosure, the on-board power supply provides a 28 volt d.c. output that is used to power the panel, drive the powered outputs and also to maintain the standby battery.

Of the 3 Amps provided by the power supply unit, 2.3A are available to drive the panel and output circuit loads and the remaining 700mA is used to charge and maintain the batteries in accordance with EN54-4 requirements.

The maximum batteries supported by the control panel power supply are 9Ah (high capacity batteries), which are typically sufficient to provide 24 hours standby and 30 minutes alarm.

NOTE: This also applies to the “larger M3 enclosure” variant of the Syncro AS panel, as the same power supply is used.

In situations where longer standby times are required, or where a standing load is taken from the Aux24 volt output, larger capacity batteries are required.

It is not recommended to connect larger capacity batteries to the standard power supply battery leads, because the 700mA charge current is not sufficient to re-charge the batteries within the times specified by EN54-4 and local codes of practice.

In addition, there is insufficient space within the panel enclosure to support larger batteries.

In such situations, the Remote PSU terminals on the Syncro AS panel are used to allow the connection of a remote EN54-4 approved power supply unit.

Two sets of terminals are provided, which allows two transmission paths to be provided between the power supply and panel in accordance with EN54-4 clause 6.6 requirements. These terminals are diode blocked, to prevent a short on one input affecting the other input.

A power fault input is also provided, to give a common power fault indication for the remote power supply. A power fault is given when 0V is applied to the PF terminal. This 0V must originate from the Syncro AS 0V terminal and is routed through volt free fault relay contacts on the power supply, rather than using the 0V from the remote power supply.

When using the remote power supply, it is necessary to continue using the internal on-board supply, as there is no provision to disable the on-board mains fail and battery monitoring hardware.
To ensure reliable operation, the internal and external power supplies must be powered from the same mains spur, such that a fault will cause both to switch to their standby batteries at the same time.

The battery capacity is the sum of the external power supply batteries capacity and the 7Ah (or 9Ah high capacity) batteries within the Syncro AS enclosure.

The protection diodes at the Remote PSU terminals prevent the panel batteries from attempting to feed the remote power supply unit.

For further advice on any of the items in this bulletin, please contact the Technical Support team on +44 (0)1322 222121 or by e-mail using techsupport@kentec.co.uk


For back issues of In the Loop and In the Technical Loop Click Here 
If you feel a colleague may benefit from receiving In the Loop/ In the Technical Loop they can register on the front page of our web site for their own future copy. Click Here.
Kentec Electronics Ltd. on the Web
Visit www.kentec.co.uk for up to date information on our product range, including: Data sheets, manuals, brochures, reference sites, news items and technical bulletins.