Dual Safety Installation
asafeinstall_dgb, AutroSafe Interactive Fire Detection System, Release 4,
116-P-ASAFE-INSTALL/DGB, Doc-1004796-2, 2021-08-23, Autronica Fire and Security AS
Page 56
12.2.2 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.
12.3 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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