Dual Safety Installation
Installation Handbook, AutroSafe Interactive Fire Detection System, Release 4, 116-P-ASAFE-INSTALL/DGB Rev. I, 2014-04-01,
Autronica Fire and Security AS
Page 55
11.2.2 Example 2: Connections using both AL_Com+ and AutroFieldBus
The distance from the Primary Panel to the Primary Loop Driver
Module is less than 3 meters. An AL_Com+ flat ribbon cable is used
between the panel AL_Com port and the I/O stack (including the Loop
Driver Module).
The distance from the Secondary Panel to the Secondary Loop Driver
Module is more than 3 meters. An AL_Com+ flat ribbon cable
(maximum 3 meters) is used between the AutroFieldBus (AFB)
Protocol Converter BSD-321 and the I/O stack (including the
Secondary Loop Driver Module). The AFB Protocol Converter is
connected to the panel’s AFB. The AFB cable length can be up to
1000 meters. Booster equipment can be added to exceed the AFB
cable length even further.
11.3 Connections Overview
There are two AutroKeepers BN-180 for each detection loop in a Dual
Safety System (see next page). One must be assigned to the Primary
System and the other to the Secondary System. The BSD-321 (if
used) must be set to the Al_Com+ protocol (default).
The AutroKeeper is physically placed between the loop controller
(BSD-310) and the detection loop (one belonging to the Primary
System and one belonging to the Secondary System) and thus
controlling/providing the loop controller access to the detection loop.
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