Power Consumption
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 30
6.4 Phoenix Ethernet Switches
A network solution (AutroNet) with more than two panels requires the
use of switches, unless AutroNet Ring Topology is used (refer to
chapter 9.5.3). Only Phoenix Ethernet switches are approved and
supported by Autronica Fire and Security AS. The switch type and the
number of switches depend on the actual installation / network design
(number of panels and the transmission length between the panels /
switches).
For detailed technical information on the power consumption for
Phoenix Ethernet Switches, refer to System Description, AutroSafe
Interactive Fire Detection System.
6.5 Power Design Considerations
The Power Cabinet’s (BP-405) power supply (BPS-405) has 3A
available, as 2A is reserved for battery charging.
The supplies have three different output classes:
A1/A2, rated 2A each. (May be paralleled for higher current). Will
always be ON except in fault situations.
B1/B2, rated 2A each. (May be paralleled for higher current)
C1/C2, rated 2A each. (Cannot be paralleled. Will be turned OFF
during every start-up/initialization.
Output class A1 may be paralleled with A2, and output class B1 may
be paralleled with B2.
The outputs current is limited by the total available current, i.e. on a
BP-405 Power Cabinet with battery, 2A is drawn from output A1, only
1A is available from output A2, and nothing available for the other
outputs.
One BPS-405 unit can be connected to one battery set. A battery set
may NOT be shared by several BPS-405 units.
The outputs from different BPS-405 units cannot be paralleled, as the
power supplies are not designed for this. Earth fail detection will also
fail. Regulations define that battery resistance shall be monitored,
which prevents the use of common battery bank.
The A1/A2 outputs are not affected of a BPS-405 software failure. If
one output (for example, A1) is short-circuited, the other ones are not
affected. This does not apply when two outputs are paralleled, (for
example, A1 and A2), as a short circuit in this case will disconnect
both outputs.
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