13 SIGMANET
13.3 AT release
13.3.1 Central AT release
Central AT release means that the appropriate central alarm transceiver (AT) is tripped by all
BMT or IMT control and indicating panels in SIGMANET in the event of failure. The control
and indicating panel in which this AT resides is known as the “AT Master BMT Control and
Indicating Panel” or the “AT Master IMT Control and Indicating Panel”.
The other SIGMANET control and indicating panels are known as “sub-control and indicating
panels”.
If the AT is disabled at the AT master control and indicating panel, this is displayed at all af-
fected SIGMANET units.
Figure 23: Central AT release
This example is not valid for IMT with VdS certificate.
The fire brigade operating panel (FBF) and the key depot are always assigned the AT1 ob-
jects and must be connected to the control and indicating panel at which the appropriate AT1
is connected.
100 / 128 BMT Project Planning Guidelines
Best.Nr. A24205-A337-B970 – Edition 12 (03/07)
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