WEBWAYONE LTD, Unit 11 Kingfisher Court
Hambridge Road, Newbury, Berkshire. RG14 5SJ
00 44 1635 231 514 support@webwayone.co.uk
The Pin Sense Control determines which state indicates an alarm or restore condition (loaded on Auto Take-On).
Due to the different BIAS controls for pins 1-8 and 9-16 the floating Pin Voltage is different. 1-8 float at 3.4V and 9-16 float
at 6.9V (measured from a 0V source). The interpretation of the above terminology does vary within the industry, however
in this instance Negative Removed to Alarm means the same as Negative Applied to restore. In the table above the
terminology is associated to the alarm state.
It is advised that the alarm conditions are set to a “removed state” so that a tamper or a break in the cabling (malicious or
fire damage etc) can be detected. The “applied state” should only be used for the alarm condition if no other option is
available.
WebWayOne SPTs are shipped in HIGH BIAS mode for Negative Removed alarms. A “Pin Profile” defines which
particular Alarm/Restore condition is applied to the individual hardwire connections. All Hardwire conditions are sent as a
SIA event. The table (below) outlines the standard designated SIA profile applied to all SPTs. Deviations from this are
either captured during the order process or can be altered on written request:-
The profile above is called “WebWayOne Std –ve” and is for use with Negative Removed alarms. If Positive Removed is
required, there is an alternative profile of “WebWayOne Std +ve”; this has Positive Pin Sense on all Pins and can be
changed on request.
An example of the raw SIA alarm event delivered to the ARC is as follows:-
[#0112|NFA8001|AFire Alarm]
Where
[#0112 (site ID)|NFA (Event SIA code) 8001 (alarm number)|AFire Alarm (ASCII Text associated with the alarm event)]
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